Influence of hydroxylation on fabrication of PVC/CaSO4 composite

• DOI: 10.1016/j.apsusc.2015.09.234
• Publication Date: 2015-10-02T23:42:28Z
• Authors: H.Y. Chen; J. Wang; P.Y. Ma; J. Liang; L. Xiang
• Keywords: Hydroxylation; Surface Modification

Abstract The influences of hydroxylation on grafting of aminopropyltrimethoxysilane ((CH 3 O) 3 Si CH 2 CH 2 CH 2 NH 2 , abbreviated as APS) and fabrication of CaSO 4 /PVC composite were investigated in this paper. The experimental results indicated that the pre-treatment of CaSO 4 particles by NaOH promoted the formation of OH − , which enhanced the grafting of APS on CaSO 4 surface and improved the interfacial adhesion between CaSO 4 and PVC matrix. Compared with the use of CaSO 4 with sole APS modification, the use of the CaSO 4 with NaOH and APS modification led to the increase of the impact strength of the CaSO 4 /PVC composite from 36.5 kJ m −2 to 50.2 kJ m −2 and the flexural strength from 48.7 MPa to 62.1 MPa.