文献类型：期刊文献

英文题名：Branching and Cross-linking of Poly(ethylene terephthalate) and Its Foaming Properties

作者：Li, Jun[1];Tang, Sitie[1];Wu, Zupeng[1];Zheng, Anna[1];Guan, Yong[1];Wei, Dafu[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Preparat & Applicat Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2017

卷号：59

期号：2

起止页码：164

外文期刊名：POLYMER SCIENCE SERIES B

收录：;EI(收录号：20171903651490);WOS:【SCI-EXPANDED(收录号:WOS:000400553500004)】；

基金：This work was supported by Shanghai Natural Science Funds (13ZR1411400) and Ministry of Science and Technology Support Program (2015BAD16B05).

语种：英文

外文关键词：Viscosity - Chains - Styrene - Thermoanalysis - Acrylic monomers - Blowing agents

摘要：The branching and cross-linking of poly(ethylene terephthalate) were investigated using two chain extenders: glycidyl methacrylate-styrene copolymer (GS) and poly(butylene terephthalate)-GS (PBT-GS) in order to improve the melt viscosity and melt strength of poly(ethylene terephthalate). An obvious increase in torque evolution associated with chain extending, branching and cross-linking was observed during the process. The properties of modified poly(ethylene terephthalate) were characterized by intrinsic viscosity and insoluble content measurements, rheological and thermal analysis. The intrinsic viscosity and rheological properties of modified PET were improved significantly when using PBT-GS, indicating that PBT-GS should be a better chain extender. Good foaming of poly(ethylene terephthalate) materials were obtained using supercritical CO2 as blowing agent. The average cell diameter and cell density were 61 mu m and 1.8 x 10(8) cells/cm(3), respectively.