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Preparation of PMMA grafted calcium carbonate whiskers and its reinforcement effect in PVC
Author(s) -
Cui JiaYang,
Cai YangBen,
Yuan WenJin,
Lv ZhongFei,
Zhang Chao,
Xu ShiAi
Publication year - 2017
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.23873
Subject(s) - materials science , whisker , thermogravimetric analysis , composite material , whiskers , thermal stability , fourier transform infrared spectroscopy , ultimate tensile strength , scanning electron microscope , dynamic mechanical analysis , methacrylate , chemical engineering , polymerization , polymer , engineering
In this study, calcium carbonate (CaCO 3 ) whiskers were grafted with poly(methyl methacrylate) (PMMA) by in situ emulsion polymerization using γ‐methacryloxy propyl trimethoxyl silane (γ‐MPS) as a coupling agent, and the properties of resultant whisker were determined using Fourier transform infrared (FTIR) spectroscopy, energy dispersive spectroscopy (EDS), X‐ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The results show that PMMA has been successfully grafted onto the surface of CaCO 3 whiskers and the maximum grafting degree (Gd) is 3.75%. The scanning electron microscopy (SEM) micrographs of the tensile‐fractured surfaces show that modified CaCO 3 whiskers have strong interfacial adhesion to the poly(vinyl chloride) (PVC) matrix. The tensile strength increases from 44.0 MPa for PVC composite with unmodified whisker to 49.5 MPa for that with grafted whisker. The dynamic mechanical analysis (DMA) and TGA results indicate that the composites reinforced by modified CaCO 3 whiskers have much higher modulus, glass transition temperature, and better thermal stability than their counterparts reinforced by unmodified CaCO 3 whiskers. POLYM. COMPOS., 38:2753–2761, 2017. © 2015 Society of Plastics Engineers