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- W2372848903 abstract "Based on the thermally reversible Diels|Alder reaction between the cyclopentadiene and dicyclopentadiene,the dicyclopentadienyl dicarboxiate derivatives were synthesized by usual organic reaction,and it was taken into PVC molecular chain as a covalent crosslinking agent.The effects of crosslinking agent,catalyst and activator on the crosslinking rate,mechanical properties and the flow feacture of crosslinekd PVC were also investigated in detail.It has been found that when PVC was reacted with crosslinking agent in the melt directly,the crosslinking rate was low (crosslinking reaction taking place at 190℃ for 36min,the gel content of the system was only 26.3%),when the ammonium salt as catalyst and polyglycol as activator were added into the reactio system at a optimum ratio,the crosslinking rate can raise 7～9 times.The crosslinked PVC not only has good thermally conversion behavior through the analysis of reaction solubility,DSC and flow curves,but also exhibits flow behavior similar to uncrosslinked PVC.Based on the recipe of soft PVC,thermally reversible covalent crosslinked PVC with better mechanical properties in comparison with the original one was prepased." @default.
- W2372848903 created "2016-06-24" @default.
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- W2372848903 date "2000-01-01" @default.
- W2372848903 modified "2023-09-23" @default.
- W2372848903 title "A STUDY ON THERMALLY REVERSIBLE COVALENT CROSSLINKING OF POLYVINYL CHLORIDE" @default.
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