Fracture mechanism of liquid-crystalline epoxy resin systems with different phase structures
A liquid‐crystalline epoxy resin was cured at two different temperatures. The phases of the cured systems clearly showed isotropic and nematic polydomain structures, which depended on the curing temperature. The fracture toughness of the systems was measured, and the fracture mechanism was investiga...
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Veröffentlicht in: | Journal of polymer science. Part B, Polymer physics Polymer physics, 2004-11, Vol.42 (22), p.4044-4052 |
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creator | Harada, Miyuki Aoyama, Kentaro Ochi, Mitsukazu |
description | A liquid‐crystalline epoxy resin was cured at two different temperatures. The phases of the cured systems clearly showed isotropic and nematic polydomain structures, which depended on the curing temperature. The fracture toughness of the systems was measured, and the fracture mechanism was investigated with polarized IR measurements. The nematic polydomain structure system showed considerably higher fracture toughness than the isotropic structure. Moreover, both systems exhibited a reorientation of the network chains near the fracture surface during the fracture process, and the region of the network reorientation in the nematic polydomain structure system was larger than that in the isotropic structure system. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 4044–4052, 2004 |
doi_str_mv | 10.1002/polb.20249 |
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The phases of the cured systems clearly showed isotropic and nematic polydomain structures, which depended on the curing temperature. The fracture toughness of the systems was measured, and the fracture mechanism was investigated with polarized IR measurements. The nematic polydomain structure system showed considerably higher fracture toughness than the isotropic structure. Moreover, both systems exhibited a reorientation of the network chains near the fracture surface during the fracture process, and the region of the network reorientation in the nematic polydomain structure system was larger than that in the isotropic structure system. © 2004 Wiley Periodicals, Inc. 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J Polym Sci Part B: Polym Phys 42: 4044–4052, 2004</description><subject>Applied sciences</subject><subject>crosslinking</subject><subject>Exact sciences and technology</subject><subject>fracture</subject><subject>Mechanical properties</subject><subject>Organic polymers</subject><subject>orientation</subject><subject>Physicochemistry of polymers</subject><subject>Properties and characterization</subject><issn>0887-6266</issn><issn>1099-0488</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNp9kEtP3DAURi1UJKbQTX-BN3RRKXBtZxJn2Y7KQxoeCxBSVcnyONcaU-eBbyKYf9_AUNixsnR9vrM4jH0VcCQA5HHfxdWRBJlXO2wmoKoyyLX-xGagdZkVsij22Geie4Dpb17N2J-TZN0wJuQNurVtAzW88zyGhzHUmUsbGmyMoUWOffe04QkptJymMzbEH8Ow5nXwHhO2A-_XlpDTkMYXJR2wXW8j4ZfXd5_dnvy6WZxly6vT88WPZeZUCVWWy1zWQoD1dlWpunS5t1J6pR1gaT1arD145woQoAulVnleVx7Bo5z7WoLaZ9-23j51DyPSYJpADmO0LXYjGamFFiJXE_h9C7rUESX0pk-hsWljBJjngOY5oHkJOMGHr1ZLzkafbOsCvS8KqXQxlxMnttxjiLj5wGiur5Y__7uz7SZMIZ_eNjb9NUWpyrm5uzw1C312cXm9uDO_1T8VSJJp</recordid><startdate>20041115</startdate><enddate>20041115</enddate><creator>Harada, Miyuki</creator><creator>Aoyama, Kentaro</creator><creator>Ochi, Mitsukazu</creator><general>Wiley Subscription Services, Inc., A Wiley Company</general><general>Wiley</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20041115</creationdate><title>Fracture mechanism of liquid-crystalline epoxy resin systems with different phase structures</title><author>Harada, Miyuki ; Aoyama, Kentaro ; Ochi, Mitsukazu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3709-4242d110afab93d7c4fa22f38c0e7afeaedf0fcc60108633b44d9fe0fe25fd203</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Applied sciences</topic><topic>crosslinking</topic><topic>Exact sciences and technology</topic><topic>fracture</topic><topic>Mechanical properties</topic><topic>Organic polymers</topic><topic>orientation</topic><topic>Physicochemistry of polymers</topic><topic>Properties and characterization</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Harada, Miyuki</creatorcontrib><creatorcontrib>Aoyama, Kentaro</creatorcontrib><creatorcontrib>Ochi, Mitsukazu</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of polymer science. 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subjects | Applied sciences crosslinking Exact sciences and technology fracture Mechanical properties Organic polymers orientation Physicochemistry of polymers Properties and characterization |
title | Fracture mechanism of liquid-crystalline epoxy resin systems with different phase structures |
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