用于聚氯乙烯复合材料中硫酸钙晶须改性的新型钛酸酯偶联剂的合成

Synthesis of a New Titanate Coupling Agent for the Modification of Calcium Sulfate Whisker in Poly(Vinyl Chloride) Composite.

作者信息

Yuan Wenjin, Lu Yunhua, Xu Shiai

机构信息

School of Chemical Engineering, Qinghai University, Xining 810016, China.

School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.

出版信息

Materials (Basel). 2016 Jul 28;9(8):625. doi: 10.3390/ma9080625.

DOI:10.3390/ma9080625

PMID:28773748

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5509043/

Abstract

A new titanate coupling agent synthesized from polyethylene glycol (PEG), isooctyl alcohol, and phosphorus pentoxide (P₂O₅) was used for the modification of calcium sulfate whiskers (CSWs) and the preparation of high-performance CSW/poly(vinyl chloride) (PVC) composites. The titanate coupling agent (sTi) and the modified CSWs (sTi-CSW) were characterized by Fourier transform infrared (FTIR) spectroscopy, and the mechanical, dynamic mechanical, and heat resistant properties and thermostability of sTi-CSW/PVC and CSW/PVC composites were compared. The results show that sTi-CSW/PVC composite with 10 wt. % whisker content has the best performance, and its tensile strength, Young's modulus, elongation at break, break strength, and impact strength are 67.2 MPa, 1926 MPa, 233%, 51.1 MPa, and 12.75 KJ·m, with an increase of 20.9%, 11.5%, 145.3%, 24.6%, and 65.4% compared to that of CSW/PVC composite at the same whisker content. As the whisker content increases, the storage modulus increases, the Vicat softening temperature decreases slightly, and the glass transition temperature increases at first and then decreases.

摘要

一种由聚乙二醇（PEG）、异辛醇和五氧化二磷（P₂O₅）合成的新型钛酸酯偶联剂用于硫酸钙晶须（CSW）的改性及高性能CSW/聚氯乙烯（PVC）复合材料的制备。通过傅里叶变换红外（FTIR）光谱对钛酸酯偶联剂（sTi）和改性CSW（sTi-CSW）进行了表征，并比较了sTi-CSW/PVC和CSW/PVC复合材料的力学、动态力学、耐热性能及热稳定性。结果表明，晶须含量为10 wt.%的sTi-CSW/PVC复合材料性能最佳，其拉伸强度、杨氏模量、断裂伸长率、断裂强度和冲击强度分别为67.2 MPa、1926 MPa、233%、51.1 MPa和12.75 KJ·m，与相同晶须含量的CSW/PVC复合材料相比，分别提高了20.9%、11.5%、145.3%、24.6%和65.4%。随着晶须含量的增加，储能模量增大，维卡软化温度略有降低，玻璃化转变温度先升高后降低。