文献类型：期刊文献

英文题名：Free volume hole size of Cyanate ester resin/Epoxy resin interpenetrating networks and its correlations with physical properties

作者：Zeng, Minfeng[1];Lu, Cuiyun[1,2];Wang, Baoyi[3];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Inst Appl Chem, Shaoxing 312000, Peoples R China;[2]Zhejiang Normal Univ, Inst Phys Chem, Jinhua 321004, Peoples R China;[3]Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

年份：2010

卷号：79

期号：9

起止页码：966

外文期刊名：RADIATION PHYSICS AND CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000278984400010)、、EI(收录号：20102413008086)、Scopus(收录号：2-s2.0-77953364367)、WOS

基金：This work was supported by National Natural Science Foundation of China (Grant no.: 10875079), and Natural Science Foundation of Zhejiang Province, China (Grant no.: Y4080448).

语种：英文

外文关键词：Free volume; Structure-property relations; Positron annihilation; Toughness

外文摘要：Cyanate ester (CE) resin was blended with epoxy resin (EP) at different mass ratios (CE/EP: 100/0, 90/10, 70/30, 50/50, 30/70, 10/90, and 0/100). The curing process of the blend system was characterized by Fourier transform infrared spectrometry (MR) and differential scanning calorimetry (DSC). Examination of the mechanical properties, thermal stability, and morphology of the blend systems showed that addition of epoxy resin resulted in improved toughness but a little sacrifice in thermal stability when compared with neat CE. The free volume size of the blend system determined by positron annihilation lifetime spectroscopy (PALS) decreased with the epoxy resin content, which is consistent with the chemical structure changes for the copolymerization between CE and EP. The crosslinking units of curing products (oxazoline, oxazolidinone, and polyether network) of the blends are all smaller in size than those of triazine ring structure from neat CE. Therefore, the free volume size of the blends decreases with increase of EP content. The correlations between the free volume properties and other physical properties (thermal stability and mechanical properties) have also been discussed. (C) 2010 Published by Elsevier Ltd.