Research progress in grafting and crosslinking modification of PVC

doi:10.19491/j.issn.1001-9278.2022.05.023

Abstract

Abstract:

This paper reviewed the recent research progress in the grafting and crosslinking modification methods for poly（vinyl chloride）（PVC）. The grafting modification methods included the grafting of groups containing C， N or S elements on carbon atom of PVC chains as well as other nucleophilic substitution methods. The crosslinking modification methods involved peroxide crosslinking， triazine compound crosslinking， diene compound crosslinking， silane crosslinking， and other chemical crosslinking methods. Finally， the development prospect of chemical modification for PVC was prospected.

Key words: poly（vinyl chloride）, graft, nucleophilic substitution, chemical crosslinking, modification

CLC Number:

TQ325.3

DENG Tianxiang, XU Lina, LI Shouhai, ZHANG Yan, YAO Na, JIA Puyou, DING Haiyang, LI Mei. Research progress in grafting and crosslinking modification of PVC[J]. China Plastics, 2022, 36(5): 140-148.

Figures/Tables 12

Fig.1. Allylation and epoxidation reaction of PVC

Fig.2. Azidization of PVC

Fig.3. Mechanism of formation of triazole and tetrazole rings from azide PVC

Fig.4. Internal plasticization mechanism of PVC materials

Fig.5. Synthetic route of PVC material without PAEs

Fig.6. Modification of PVC using p?aminothiophenol

Fig.7. Graft?modification of PVC using bio?based epoxy monomers

Fig.8. Principle of free radical generation in PVC

Fig.9. Principle of Diels?Alder reaction

Fig.10. Dicyclopentadiene cycloaddition reaction

Fig.11. Reaction principle siloxane cross?linked PVC

Fig.12. Reaction principle of triazine compounds cross?linked PVC

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