文献类型：期刊文献

英文题名：Free-volume properties and toughening behavior of cyanate ester resin/carboxyl-randomized liquid butadiene-acrylonitrile rubber composites

作者：Zeng, Minfeng[1];Sun, Xudong[1];Yao, Xiandong[1];Wang, Yun[1];Zhang, Mingzhu[1];Wang, Baoyi[2];Qi, Chenze[1]

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

年份：2009

卷号：44

期号：16

起止页码：4270

外文期刊名：JOURNAL OF MATERIALS SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000267784300010)、、EI(收录号：20092912194783)、Scopus(收录号：2-s2.0-67650076971)、WOS

基金：This work is supported by National Nature Science Foundation of China (Grant number 10875079), and Nature Science Foundation of Zhejiang Province, China (Grant number Y4080448).

语种：英文

外文关键词：Butadiene - Esters - Fourier transform infrared spectroscopy - Free volume - Phase separation - Positron annihilation spectroscopy - Resins - Rubber

外文摘要：The toughness of cyanate ester resin (CE) matrix was improved significantly with addition of carboxyl-randomized liquid butadiene-acrylonitrile rubber (CRBN). The curing behavior of the system was studied by differential scanning calorimetric (DSC) and Fourier transform infrared spectrum (FTIR). The results showed that carboxyl groups on the CRBN chain had slight activation effect to CE curing reaction at the beginning of the cure process. Phase separation was the main toughening mechanism for CE/CRBN composites. The existence of micro-size pores induced by small amount of the low weight molecular part of CRBN might be another toughening mechanism. The toughening mechanism was proved powerfully from the aspect of free-volume using positron annihilation lifetime spectroscopy (PALS). PALS is qualitatively sensitive to the existence of pores induced by low molecular weight part of CRBN during curing process.