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Open AccessArticle

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

by Wenjin Yuan 1,2, Yunhua Lu 2 and Shiai Xu 1,2,*
1
School of Chemical Engineering, Qinghai University, Xining 810016, China
2
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
*
Author to whom correspondence should be addressed.
Academic Editor: Volker Altstädt
Materials 2016, 9(8), 625; https://doi.org/10.3390/ma9080625
Received: 27 May 2016 / Revised: 16 July 2016 / Accepted: 19 July 2016 / Published: 28 July 2016
(This article belongs to the Special Issue Polymer Blends and Compatibilization)
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−2, 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. View Full-Text
Keywords: poly(vinyl chloride) composites; calcium sulfate whisker; coupling agent; surface treatment; interface poly(vinyl chloride) composites; calcium sulfate whisker; coupling agent; surface treatment; interface
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MDPI and ACS Style

Yuan, W.; Lu, Y.; Xu, S. Synthesis of a New Titanate Coupling Agent for the Modification of Calcium Sulfate Whisker in Poly(Vinyl Chloride) Composite. Materials 2016, 9, 625.

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