文献类型：期刊文献

英文题名：Use of tung oil as a reactive toughening agent in dicyclopentadiene-terminated unsaturated polyester resins

作者：Liu, Chengguo[1,2] Lei, Wen[3] Cai, Zhengchun[3] Chen, Jianqiang[3] Hu, Lihong[1,2] Dai, Yan[1] Zhou, Yonghong[1]

第一作者：刘承果;Liu, Chengguo

通信作者：Liu, CG[1]

机构：[1]Chinese Acad Forest, Inst Chem Ind Forestry Prod, Nanjing 210042, Jiangsu, Peoples R China;[2]CAF, Inst Forest New Technol, Beijing 100091, Peoples R China;[3]Nanjing Forestry Univ, Coll Sci, Nanjing 210037, Jiangsu, Peoples R China

年份：2013

卷号：49

起止页码：412-418

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20132716475408);Scopus(收录号：2-s2.0-84879568050);WOS:【SCI-EXPANDED(收录号:WOS:000324566600057)】；

基金：The authors are grateful to the financial support from Chinese National Special Fund of International Cooperation Of Science and Technology (No. 2011DFA32440) and Chinese Academy of Forest for the Special Fund of Fundamental Research (No. CAFINT2011C02).

语种：英文

外文关键词：Tung oil; Toughening agent; Unsaturated polyester resin; Dicyclopentadiene; Diels-Alder reaction

摘要：Unsaturated polyester resin terminated with dicyclopentadiene (DCPD-UPR) was modified by tung oil (TO) via intermolecular Diels-Alder reaction occurring at the later stage of melt polycondensation. These TO-modified DCPD-UPR (DCPD-UPR-TO) polymers were characterized by FT-IR, H-1 NMR, and gel permeation chromatography. The DCPD-UPR-TO polymers were further blended with styrene comonomer and cured via free-radical polymerization to give crosslinked thermosetting polymers. Scanning electron microscopy was employed to produce surface morphology and dynamic mechanical analysis was conducted to study the thermo-mechanical properties. Thermal and mechanical properties of these biomaterials were also investigated and the results show that toughness of them increases obviously as the increase of TO content. Compared with the neat DCPD-UPR matrix, the matrix obtained from DCPD-UPR-TO with a TO content of 20% has maximum increase of 373% and 875% in impact strength and tensile failure strain due to the synergistic effects of phase separation and crosslink density. However, the optimum amount of tung oil is 10% because its polymer matrix gives a best stiffness-toughness balance. These oil-based polymer materials show promise as an alternative to replace petroleum-based materials. (C) 2013 Elsevier B.V. All rights reserved.