文献类型：期刊文献

英文题名：Comparison between polyether titanate and commercial coupling agents on the properties of calcium sulfate whisker/poly(vinyl chloride) composites

作者：Lu, Yunhua[1];Li, Xingwei[1];Wu, Chifei[1];Xu, Shiai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Qinghai Univ, Sch Chem Engn, Xining 810016, Qinghai, Peoples R China

年份：2018

卷号：750

起止页码：197

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20181504992968);WOS:【SCI-EXPANDED(收录号:WOS:000432668500025)】；

基金：This research is financially supported by the National Natural Science Foundation of China (U 1507123), the Foundation from Qinghai Science and Technology Department (2017-HZ-803), Thousand Talents Program of Qinghai Province and Kunlun Scholar Award Program of Qinghai Province.

语种：英文

外文关键词：Calcium sulfate whisker; Coupling agent; Surface modification; Mechanical properties; Poly(vinyl chloride)

摘要：In this study, calcium sulfate whisker (CSW) was modified with a newly synthesized polyether titanate coupling agent (eTi(4000)) and four commercial coupling agents, including two silane coupling agents (KH560 and KH570) and two titanate coupling agents (KR38S and KR138S), respectively, and then the modified calcium whisker (mCSW) was incorporated into poly(vinyl chloride) (PVC) by melt blending to prepare mCSW/PVC composites. The morphologies, mechanical properties and thermal stability of these mCSW/PVC composites were compared. The results reveal that the four commercial coupling agents have slightly better reinforcing effect, while eTi(4000) shows much better toughening effect. Moreover, the mCSW/PVC composite modified by eTi(4000) shows higher storage modulus than those modified by commercial coupling agents in dynamic stress mode. The energy dissipation mechanism of these mCSW/PVC composites during the impact process was analyzed, and their interfacial interactions were evaluated quantitatively by the damping ratio. The mCSW/PVC composite modified by eTi(4000) exhibits better thermal stability than their counterparts modified by the commercial coupling agents. Generally, eTi(4000) is an effective coupling agent for CSW, and it can endow mCSW/PVC composites with better balanced properties. (C) 2018 Elsevier B.V. All rights reserved.