PMCs are designed to transfer loads between fibers of a matrix. ��Ԙ�Y)�N�K8�Y!�}/o{Y�1�t�w��yxL���Y�S��er�p�p��Ob�'R��W����'2N�HAA���b�r����Ds���j�6�ϰ~�hM�q�`�$�T���g� �|��,� 0000078721 00000 n
  • Thermosetting polymers - Polymers that are heavily cross-linked to produce a strong three dimensional network structure. It has high strength, high modulus and high impact resistance composites. 0000078439 00000 n See our User Agreement and Privacy Policy. �,e�,�p-1+-qC-1[]q}'7�sP7����˼����}\��n�a�?�0�������D+fC�us�ϺN���ް m�����t���tS��Mmy ����ޖ@�-���m���H�^���G ��m�� D3���9E�h��2z�-�f���J&����]�+��� m\���f �2 3.1.2.
  • Thermoplastic polymers - Linear or branched polymers in which chains of molecules are not interconnected to one another. 0000077689 00000 n 0000081237 00000 n The main classes of composites are metal-matrix, polymer-matrix, and ceramic-matrix. Classification of composite materials II See our Privacy Policy and User Agreement for details. 1.3.1 Classification 1.3.1.1 Classification by polymer type. �-���ev~ӷ��I��|���^3�óm�ذ{�$c��`0��Ba���'��U:�CK�[��(��j�8Zѡ3 n��_���YD���i��U����!�n��NGk��-�ww���˿ �����KmZi��E�%�����FX����r���i�3�5�ٕ��A!��̬��BS��ta�_�q�=�m�����=���/�[V3�.��Jx1�\N�wH�bȿ@�M���G�N:��)3������0��)=�Nxq�W�'�+��|��\�C���EN�Y���}B+P�Q�����������]��9c ���F�$����gv���Yc����,�����|>ן����[Rn}�H!���o��R��:Y.������,s���.����=kɍ,�Y-��J׎|��v�scW��d�ݍ�2bt�-�7�Γ�]�����,���`7v�p�����������*����gg����q����py�Or��o���2vTn{����3�9N玽��7��D�W��/����q�2rt�WO�7vu�;�`���2ٮt���5�����5�k�Ш�>��d��� ��}�M�U]Ԍ���B�!Dy�a�)����4�;� �) The fundamental concept and classification of composite materials, properties of composites and the primary as well as secondary processing methods of polymeric matrix composites have been explained in detail. 0000028827 00000 n By the geometry of the reinforcement — particulate, flake, and fibers 2. large number of composite types exist that are represented by different combinations of metals, ceramics, and polymers. Classification of composite materials II (based on reinforcing material structure) 0000024651 00000 n a��v ��=|N���{�����0G�����}\;m���T�*�!�~�6Ǧ+��g�_)�g���1a�t�/@6����S_5�q7���b�\;����\��%U����YR�*9�]6�m7�h J F=AQ�~�-R�T8����j��?� S0[�y�ꘄ9�Z[�gU1l��@�oMˋ"�}���� 0000079878 00000 n Based on their composition, composite materials for space applications can be classified into three principle groups: polymer matrix composites (PMCs), ceramic matrix composites (CMCs) and metal matrix composites (MMCs). startxref Classification: Fiber-Reinforced (i) • Fibers very strong in tension – Provide significant strength improvement to the composite – Ex: fiber-glass - continuous glass filaments in a polymer matrix • Glass fibers – strength and stiffness • Polymer matrix – holds fibers in place – protects fiber surfaces – transfers load to fibers 0000077220 00000 n Polymer Matrix Composites are very popular due to their low cost and simple fabrication methods. 0000005218 00000 n Polymer matrix composites “are comprised of a variety of short or continuous fibers bound together by an organic polymer matrix.” They offer high strength and stiffness, unlike ceramic matrix composites (CMC), which offer toughness. CLASSIFICATION OF POLYMERIC This paper is a continuation of the article “Composite Materials-A Review” and it presents an overview of polymer matrix composites. 0000079555 00000 n Mechanical properties – Fracture. 0 2'N��֥�U%�q�|��٘���c�ƌ\43x�$�=Ƙ��V�T\>��i�&6 {�*j�Wb��W�3h"���oǶ������\��s� ^8��U���ud�@ �b#���� ����]�m��O�D۲��$�3P��G|�?�G���p ��V��3@C���B����A� =4D�i*Ɖ(}�n�hQ*]U�zлs}?q�M_v�l�؍�A#7���84r�I��ދ�~��s��X2�4��!>@DI�S��'� ��y�������'� �< ��D/c/=�T�[��������8Q4��t1��PR�`����W�.ր�M�ٳա ����M_c�35�^ ���Jb��_�����Q�"�*AsK�4����[�6�ԉZ+�"܈_�������Q� ޯҐL�-��;_ޭ�%2��;XRM�ͳ��fT�ΆC�ګ��R9������boP3��올��G�� �ii��֘��^q�_I�x�? Polymer Matrix Composites In PMCs polymer is the primary phase in which a secondary phase is imbedded as fibers, particles, or flakes • Commercially, PMCs are more important than MMCs or CMCs • Low density, high specific strength, high specific stiffness, ease of fabrication. thermoset (Unsaturated Polyester (UP), Epoxiy (EP)) or thermoplastic (Polycarbonate (PC),Polyvinylchloride, Nylon, Polysterene) and embedded glass, carbon, steel or Kevlar fibers (dispersed phase). We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 0000033897 00000 n 0000003807 00000 n ԪTp���1AC�Ӏgbf��N�չ�~dD�O���SH�*. 0000003843 00000 n 0000000016 00000 n >�Y��-�^N�Ґ�3U�R����x��t����!�l�&�\�c^���]������ΥɛȟۂZg�ێ8����@!���D���*�_����َ9���;�#3��c����kYt�f���G�=/GU�c?~����Cw��Q>49�h�� �@/�B�4O:�,_���.98bS�3�R��fsj�%�!���`j6��^4��j 0�V��.c�D����x1�"X�QlE�V�[9���ĺ^�A��G{9��r��h�}�'ق�G�,�DMU}��r2$d�gai(� �9�)>r�A���* �F��)c�5L�g�pzf����G���_fė]�j@`���L�453Z�o&�m~�����d,a7B��L^(Ҽo~��������j|H�PNz����i�ܴy҆����}���~��=�@ϟ__G�ZI؏X�N�6,G�4�y��W��>va{V���\��W�~�(CHL;�U01�!�lX������s��9���O�K���!��Pr�:)v�})����(��Y|�/�x6[d�y���o�|/��J����]�^;t�'1��%1�� N�ĸ����6�J �/-������ H�ԗKs�8F��XR]%�x�v5�rwz��,�Y�9��l%�S����]��6����$�K���\��*%6�R�� Polimer Thermosetting - Polimer yang saling menyilang untuk menghasilkan struktur jaringan dimensi tiga yang kuat. 1. 0000078263 00000 n M��;=�G�������b��A�4*�7��#�J��Wʒ�q_|p[���}.�Z�B7�ð��ht��á|?�:V� �j�!PHƁ���s�K? �iU��x�sZ1��&X�i5hG����ۺ�|�M/xu3��g�������i�����?�s��q�����O�e����ץ���c � ٖ��l�1\�� &�b�m9��v��@\�� 7��闂���c�@�����w��wXr���M6o���-6Ogռ�c��=�������x�[�1������7�{�z��t:�wJ��P�:T��8��# �@���# ^�g�� ��#�N�Rx�x�� �����B|r�/�C~���L��H��卾a�gk�n�(1�2�r�� (�X��{[T/�]���Ӫ *͂�1�b�Q��4�1�E)��(�0��;? Polymer Matrix Composites (PMC) Polymer Matrix Composites are composed of a matrix from . 0000076889 00000 n Category Classification of composite materials: Download: 16: Processing of polymer composites: Download: 17: Hand lay-up: Download: 18: Spray lay-up: Download: 19: Compression molding. ��%���{Q���^S�X}�V ��j�/՟�}bO�V���Ψg�� ���!H�FAzh�Ӡ��' ��L%�C����ӑ���Lf�٘ш03�fcF�\�x>���'1��f�Y�B�6P2��O9���5���'��ӉT�/LT� [�ږ�zy4�t�va�M�k_ 0000003002 00000 n 0000080729 00000 n 0000004673 00000 n You can change your ad preferences anytime. 0000079703 00000 n Unlike a ceramic matrix composite (CMC), in which the reinforcement is used primarily to im-prove the fracture toughness, the reinforcement endstream endobj 219 0 obj<> endobj 221 0 obj<> endobj 222 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC]/ExtGState<>>> endobj 223 0 obj<> endobj 224 0 obj<> endobj 225 0 obj<> endobj 226 0 obj<> endobj 227 0 obj[/ICCBased 246 0 R] endobj 228 0 obj<> endobj 229 0 obj<> endobj 230 0 obj<> endobj 231 0 obj<>stream ��6��H|�����YJ2��(��.d�;�vg�3K2��Em�k�}��V�������,�9v���>��C7?��5��)�~Ġ&�6�b���Oy��&�U��)ÅC�l� ���h���s����H- �X��úz����^\콸��~�7�˛+%>��������_WՋ�JY�VJ�� ~��IMP+������F6M���Տ�C}�ʆ��mWo+�e���e����:㛉Dԯ��[���.V_�e��Tq�;ܡ����=u�4m�����zjB�\+��jU}˞��N[��ZI����^ہ.+��Y�e��J°��l�HY��2���WC}T� 0000002106 00000 n ��B .C �F�PY����+�6�ʂ�1�0D0l`L r��\p���y �fb;� �d�� j�y<=�_m����nݥO���|n����܂z[���������~}8n���nש_�f7�u|���>l}h�}:�����5׬k ����lCY"��G�8���Īo��`�*���%5E��-@^֦A�sؼc�(-�*��������k��jӳ;�h4a�P��>Hlu>&������rD�f�&G���+K� {#j��P� @��������[“]�^��S���~؆�k(*rlw�&�v ���]�n�Ϥ��wiS2}�>�GPߨ������_Ӽ3\AI���F�o��@� Ⰿ�t��7��� �-ɡ��i�m���D�s�Ŋ���U&�� �6�E���bP����w�)�4M~���q�i5�wDkz=�#�_����_Y!�F�:�*̥���f�tJ��DU�^�YE�&*���>쑊��u�L�BK��������Q?z= ɻ��ŶM�ݍ��P�v���o��G^����q2�7��j$-�㯻d��u׶7 O��u��nS�� ӢÆx0n��ĉ�I@f5��Cxr;�~1Q�c��M*�����$V�}m�h�`_����M����~y����*����5�h5%�ϱT���ۤ]�#n Polymer matrix composites are often named by the type of their reinforced fiber, such as glass fiber composite material (com-monly known as glass fiber reinforced plastics), carbonfiber composites, and hy-brid fiber composites. Its main aim is to assess the development of these materials and their need. Use of non reinforced polymers as structure materials is limited by its mechanical properties. 0000010269 00000 n 0000004280 00000 n x�b```f``�``c``�� Ā B��,O���ZXY"��YmpQ���Ф�M��籽s``�z{��;� *�И������䂃.-&1��Z�l�R�w���2Q?�:i�'ÒS� �}��,,:��ƥ�����h/ז��R6K's�L���5��q,�������,Yͧ��ȉ�%�A����2���C�+@��R(�0�X�!2D�L@�G8 ��-��� �ET�M85=�$�'2�b�R� �@u�w����� ]� �*A� �K4�Һ�d�5804320�0�`+�~�ܠϐ�(������ � �`�����I�E��@��2�]C��R��F�V. 0000033660 00000 n Now customize the name of a clipboard to store your clips. Get Free Polymer Matrix Composites Chapter 3 Princeton ... reinforcement type and composite structure. 0000002380 00000 n The second classification criterion refers to the reinforcement phases; here, fiber-reinforced composites (FRCs), laminar composites, or particulate composites are distinguished. 0000079226 00000 n High-Performance Composites. 0000077397 00000 n 0000078128 00000 n 1Ւ=3��E�d���WǾZA��~�*��Ґ�0���H(�As��HFrG%���zx�Tp*�P��Q�PXJ�&�)��($FW�id��ķ�oqDSDL��/�;cu��:��Q=�!~�Ȕ��J����~�p�[���vss����ӈPR���T���w 4.4 Composite materials are defined as two or more materials that are combined on a macroscale. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This review focuses on the non-polymer matrix composite materials, the CMC materials and the MMC materials. Polymer matrix composites and technology provides both students and those in industry with a valuable introduction to and overview of this important class of materials. 0000003345 00000 n m��7� ��Ѵ ��F�^��h3Z�9he>�Vے&�f��x#S4�A�&1��$1����� ��� Strength of Aligned Cont. o��14�����ku�RkeMl�/1ؘR萡����a�M}������QJP8�]b_��¥� k$�5j�B����Pߥ��"Q� ZL��P5D^��:�n�m���k�f���f���]�?�FWU�u�r`_�j�g�'6|�g�7���h�Ӟ���7߳�v��o��wT�O� ��A:�E��#��eST�����C���2�WD�BiE"��@0�õ�M׈�$��^�We6�dbr��!��*4R��q��@R�Rv����1e�:���c�Z�� With more than two-thirds of the composite market, thermoset materials represent the main polymer class for composite matrices. large molecule or a macromolecule which essentially is a combination of many subunits xref By the type of matrix — polymer, metal, ceramic, and carbon. The occurrence of eddy currents in magneto-polymer matrix composites also has the effect of shielding underlying material from incident electromagnetic waves, and this characteristic is often exploited for the development of reflective EMI shielding , . The term OMC generally refers to two classes of composites, namely, polymer matrix composites (PMCs) and carbon matrix composites, which are usually called carbon-carbon composites. Looks like you’ve clipped this slide to already. Polymer Matrix Composites (PMC) Polymer Matrix Compositesare composed of a matrix from thermoset(Unsaturated Polyester (UP), Epoxiy (EP)) or thermoplastic(Polycarbonate (PC), Polyvinylchloride, Nylon, Polysterene) and embedded glass, carbon, steel or Kevlar fibers (dispersed phase). K] ��u�/�r)�����n�?�w���~�ދ�݃H��lhy��ʆ:q�7L�`��n����A\^?>l�+.vw_w��#F�Q��-n������?�w�.�3�^�&����Ry�()#�b�D))�����#M�^?l��y��k���j ����{q��~�����Nɔ\���n���"B-��/Um���f{}���7��0�g�����������)�ԡ���R�-y�q��x����u�S�˷X����z|4���J�"e�]�M+ۡ����Ek��i�M�5]�zz�Q��`����Z��i�Eo���[è]3=���8�������5Ң�޵��Om�IԷ�ѓG �t��F1��0Z���z�;%^��=��M�����s$�Ӟ�8#�9C,�+t$�)�g ���;�)�����)��!ǬM����xf-�)������"G�M�5�M:��ָHi��ָLam9fm�0���`o�b[�#��3�����#�֞0�X}( _���!f�1�R)�1�B�1 Classification Reinforcing Phase Properties Other Structures Metal Matrix Composites Ceramic Matrix Composites Polymer Matrix Composites “ Composite is a materials system composed of two or more physically distinct phases whose combination produces aggregate properties that are different from those of its constituents Metal Matrix Composites (MMCs): 0000066705 00000 n 4.2.2. to give stiffness to the composite part. Bio resin based natural fibre composites and their applications, No public clipboards found for this slide. 4.3. ���ʜ��GL4 0000080392 00000 n If you continue browsing the site, you agree to the use of cookies on this website. 0000038712 00000 n rial, aluminum matrix composites, polymer matrix composite material, and epoxy resin matrix composite material. 0000077998 00000 n 0000002190 00000 n Key Features. 0000078573 00000 n 0000047004 00000 n … They are Aramid Fiber Reinforced Polymer Composites (AFRPs).
. Provides a helpful overview of these materials, their processing and performance incorporating naming and classification of composite materials Classification of Polymers
  • Linear polymer - Any polymer in which molecules are in the form of chains. Polymer Matrix Composites FINDINGS Polymer matrix composites (PMCs) are com-prised of a variety of short or continuous fibers bound together by an organic polymer matrix. Polymer nanocomposites can be classified on the basis of dimension of nanofiller (0D, 1D, 2D, etc. Mr�~�Ҁ���zj�x�����������-�����;2� (�s�$���ya�dBҶ0w�.^�Z��Ǣ�l="iӓ�G��a[ ?`^��� A�����Pxo�n�>[���}eUcK�( m�¥�ƭ[ Polymer Matrix Composites (introduction) Dr. Dmitri KopeliovichAccording to the Classification of composites: Polymer Matrix Composite (PMC)is the material consisting of a polymer(resin) matrixcombined with a fibrous reinforcing dispersed phase. Some of the advantages with PMCs include their lightweight, high stiffness and their high strength along the direction of their reinforcements. 0000081073 00000 n Polimer Termoplastik - Polimer linear atau bercabang di mana rantai molekul tidak saling berhubungan satu sama lain. Polymer Composites is the engineering and scientific journal serving the fields of reinforced plastics and polymer composites including research, production, processing, and applications. 220 0 obj<>stream 0000010041 00000 n Other advantages are good abrasion resistance and good corrosion resistance. 3.1.1. very popular due to its low cost and simple fabrication methods. The high strength/weight and stiffness/weight properties of resin, metal, and ceramic matrix composites will play an increasingly key role in meeting these performance requirements. 22. 0000020399 00000 n ͌T�V�k��P��{îv�W?��b�O�\�Ъ�@U�' �Ke������wZ���dK���/�:4�m)��ݢ[�}�L�u8���J��c�,�c�4�*%��jQ����G~y(��4|](�m�p_�g�����^ӑ����LW�ul)�����~�ꢳ�cUi���u|��j?��)5����.+®��22_\?5q ��*���Y ��9 !ʪ�z�,�����9 )J��+�.5a_��,���,=��z 0000044334 00000 n 0000001556 00000 n ), type of nanofiller (metal hydroxide, metal sulfide, etc. �LED��n��c�-���.�Ӈ� If you continue browsing the site, you agree to the use of cookies on this website. At NASA Lewis, research is ongoing to apply graphite/polyimide composites to engine components and to develop polymer matrices with higher operating temperature capabilities. Polymer composites are light, stiff and strong materials when compared with metals. Polymer matrix composites and technology provides both students and those in industry with a valuable introduction to and overview of this important class of materials. Fiber Composites Matrix Fiber} Same strain So, either Matrix fails first Or, fiber fails first Brittle matrices eg. Provides a helpful overview of these materials, their processing and performance incorporating naming and classification of composite materials; 0000016199 00000 n Furthermore, some naturally-occurring materials are also considered to be composites—for example, wood and bone. trailer 0000009704 00000 n Two examples of this gray area between polymer matrix composites and plastics are toughened polystyrene and liquid crystal polymer. Classification of Polymers Polimer Linear - Semua polimer yang molekulnya dalam bentuk rantai. Paticulate Composites: Particulate Composites consist of particles immersed in matrices such as … 0000009290 00000 n But their reinforcing phase can be metals, polymers or ceramics again. 0000079377 00000 n Composite materials are classified according to their matrix compound. However, most of those we consider in our discussions are synthetic (or man-made) composites. '��Z�NY�^���qG�pm[��C�LXzU��jُr ���3-7�)Ȏ���9 �D�k�،���؋+�h���ru�J���I���P*~������F|����=�i��&a�f��T}S�@=�C����,nӵ[�'��:y��Q��Z���X~��k ��v�L�:��:)�h>�`]�l�3u�B=�>���i�'����4�0��;71XF���P5'��R��q�R�)��1ǴM�6[5�%O�#��3�^�����ymO�6�� CO�#�663j�"�66Sh�c�i�0m���� �t�����i�#N��s%P�BKg�T?Qj�F���I�v�H�h��@�� 2�@?w �����}e�H��RC�E�����z��:ҵ��D7lnPY��_�F뱮5���-3�O�`���~d�x���[0]�,���5R��8�ĉ�"�+�t�y�x��a;V M���d��fvK,�q��R�)�q�R�)�q�B�n��Q�̠�ό��`m��e�Ư[Jm����f endstream endobj 232 0 obj<> endobj 233 0 obj<> endobj 234 0 obj<> endobj 235 0 obj<>stream 0000038548 00000 n %%EOF 0000003585 00000 n Glass fibre-reinforced polymer composites (GFRP) are the largest amount of produced carbon fibre-reinforced polymer composites (CFRP). 0000077820 00000 n H��W�nG}�W�Ӣ'����~Y`WNv��mqa,�}���D��(*�?d�{�T_�"���x�8}���r��u�x��ma�ڲ 0000076269 00000 n 0000079065 00000 n The matrix undergoes a melding event which sets the part shape necessarily. Glass fibre/polymer interface. %PDF-1.4 %���� 218 0 obj <> endobj
    • UNIT II POLYMER MATRIX COMPOSITES: 9
    • Types – Processing – Thermo sensing matrix composites – Hand layup and sprayup techniques filament winding, pultruion, resin transfer moulding, auctoclave moulding – thermoplastic matrix composites – Injection moulding, film stacking – diaphragm forming – thermoplastic tape laying. 0000003079 00000 n 0000076725 00000 n 0000077550 00000 n There is a gray area between composites and other material classes. m�+����(�t�����t�2:9V�h��������� �)�p���)D�1����&������OŋŢ�G ��0�TiAF;�B��n�7I%t漑�Bͣ�V.�ڡM�NI���� �5�;v\7���Nk��n>g*L9��h0�!u�J�8�p�;�1N�m�\��m�l�Km���2��i�����mm��œUB�����L����f�#ڦK^Op��UB��˔ڸL��͌��c�&G��jEu�J(���B�)��A�,rD۔ai33m�:G�)�q�R���!ǴM�g��>��NFԊ�9o�Q)�q�B����D¦�����HHE��ԑ^P a��ihC��:Tnlᡣ}��M��2��1�;D���Wi�~ �V?n���ڑ݌������ ]��g��ZQ��15���]ʦS�%C)�aP�#G�9��T֡��G��V��ߺ����AmH�����&5X��462:�"��9䈱 ����1e�ƸH���θL)m�9fm�p�ᅭ�1�OW��66Rh�3�66Sh�e�h�2,mJV��J��EJml���eJms�1m�mZz{��;�ھ�s̨����̨���f�Q[njڦ�ʜ��L�W��xTM_u�(��tV��%VI!��MՈՏ�C}�^,u#M��X� }}ݵ�hk������m�l�h��Ho���i�F)�C}�aB� X�E}�PclJ��&�Q����x��4 ��������A���7R���"�CA����m�Y(�o}�~H�.� �weL�= 0000090565 00000 n 0000077056 00000 n <<566828a3935f3344a3eb3591b5ec97fe>]>> 0000080214 00000 n This melding event can happen in several ways, depending upon the matrix nature, such as solidification from the melted state for a thermoplastic polymer matrix composite or chemical polymerization for a thermoset polymer matrix. Bur composites are defined according to their matrix compound; Ceramic Matrix Composites (CMC): This category of … Fiber Reinforced Polymer (FRP) speaks to a class of materials that falls into a classification alluded to as composite materials. V�-|ۗ�^���_ �Ì��T6��BlH�� – Polymers – Thermoplastics, Thermosets on most molding compounds & Elastomers with carbon black – Reinforcing fibers • Roving(Untwisted strands)-> Woven roving • Yarn (Twisted strands)-> Cloth • Mat – a felt made of randomly oriented short fibers cuts to shape called … 0000076535 00000 n Polymer matrix composites are classified based on their level of strength and stiffness into two distinct types: Reinforced plastics - confers additional strength by adding embedded fibrous matter into plastics Advanced Composites - consists of fibre and matrix combinations … The subject is treated in five sections. 0000078901 00000 n 0000038358 00000 n 0000033282 00000 n �"�07�S/�m�f�$�W"�w���/W�a:xE��V\���X�P�[��et��f�1�;��w9�_�VjW��3\���G+b���#��^�眽8t:�����ה��^ߋ��5ֻE����A���ϔrE�@J6)�}��N6��(-��t[F��v�=�)�� 9�2�(��Ŷh�_,����@xTu�����r|��� ��a���>�6}��0\�3� �I��Ţy\p�6]NZ�h���`=�p���cMkg�]��f{}�^8L��� ]�2��\*$�w����&�~� �����S�œW~*����(�4��M�'\�|}@��Y���й���Ӌ�p�`�y���W�n�6|��X �/� 218 63 0000080893 00000 n ǫ ��d�D����p��$#�L�#Sr-�p��L��Z�"�Y���!S_�����Hti�����(���ʙ[�!�%9&S%�0��LZ��m�;?w�bEf��8ɲ���+��B1&S(�p Categories of Polymer Matrix Composites Polymer matrix composites are classified into two categories. 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