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Thermal Stability of PVC with -APS-g-MMT and Zeolite Stabilizers by TGA Technique

¹ Materials Science and Engineering Department, Faculty of Engineering and Industrial Technology, Silpakorn University, Thailand
² Polymer PROcessing and Flow (P-PROF) Research Group, School of Energy, Environment and Materials, King Mongkut’s University of Technology Thonburi, Thailand

^* To whom correspondence should be addressed. E-mail: chanchai{at}su.ac.th.

	Abstract

In this work, hexadecyltrimethylammonium bromide modified montmorrillonite (OMMT), 3-aminopropyltriethoxysilane-grafted montmorrillonite (-APS-g-MMT), and zeolite were used as thermal stabilizers in PVC compound. The thermal stabilities of PVC were then assessed in terms of decomposition temperatures by thermal gravimetric analysis. X-ray diffractometer (XRD) was used to characterize the d-spacing of MMT as a result of -APS modification. The XRD results suggested that the d-spacing of silicate layers could increase with a chemical grafting of -APS molecules onto MMT. The zeolite was found to be the most effective stabilizer for PVC as compared with OMMT and -APS-g-MMT stabilizers. It was found that the greater the zeolite and -APS-g-MMT loadings in PVC compound, the higher the decomposition temperatures up to 7 phr. No synergic effect was observed on thermal stabilities of PVC by incorporating a mixture of -APS-g-MMT and zeolite stabilizers in PVC compound.

First published on October 6, 2009
Journal of Thermoplastic Composite Materials 2009, doi:10.1177/0892705709347082


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