Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Abstract

Six new polyether titanate coupling agents with different polyethyleneglycol (PEG) segment lengths were prepared in this study and were then used to modify calcium sulfate whiskers (CSWs) in order to improve the compatibility between CSWs and poly(vinyl chloride) (PVC). The chemical structure of these coupling agents was characterized by FTIR, Raman, 1 H NMR and 31 P NMR, and the surface properties of CSWs modified by the coupling agents (mCSWs) were characterized by FTIR, SEM-EDS and XPS. Then, CSW/ PVC and mCSW/PVC composites were prepared using a two-roll mill, and their mechanical and thermal properties were characterized to investigate the effects of the PEG segment length of the coupling agents on the performance and compatibility of the composites. The results show that the new coupling agents can significantly improve the compatibility and the interfacial adhesion between CSWs and the PVC matrix, which results in a significant improvement of the comprehensive performance of mCSW/ PVC composites. PEG4000 shows the best modification effect on CSWs. Finally, the underlying mechanisms are discussed.

Crosslinking of hydrophilic polymers using polyperoxides

“…5a). The increase at 880 cm −1 can be attributed to symmetric stretching of ether bonds that are formed during the crosslinking [73][74][75]. This observation was less noticeable when using P[PM-co-BA-co- MA] as a crosslinker (Fig.…”

“…This may be due to the lower mol% of peroxide groups. Changes of a band at 1065 cm −1 (asymmetric stretching of the C-O-C group) can be explained with changes in the MA and ether contents [74,75]. The signals at 1780 and 1725 cm −1 , which correspond to C=O groups of MA and esters, respectively, initially increased with temperature ( Fig.…”

Effects of inorganic‐organic surface modification on the mechanical and thermal properties of poly(vinyl chloride) composites reinforced with fly‐ash

“…The coupling agent used was prepared according to the procedure reported in our previous study [ 35–37 ] :…”

Crosslinking of Hydrophilic Polymers Using Polyperoxides

“…This may be due to the lower mol% of peroxide groups. Changes of a band at 1065 cm -1 (asymmetric stretching of the C-O-C group) can be explained with changes in the maleic anhydride and ether contents [70,71]. The signals at 1780 and 1725 cm -1 , which correspond to C=O groups of MA and esters, respectively, initially increased with temperature ( Figure 5, blue).…”