China Plastics ›› 2017, Vol. 31 ›› Issue (9): 97-101.DOI: 10.19491/j.issn.1001-9278.2017.09.015
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Abstract: Effects of several 6-aminouracils on heat stability of PVC were investigated by an oven discoloration method.The results indicated that the heat stability of PVC was improved with an increase of electronwithdrawing capability of groups linked to the carbamido groups.Based on this progressive change law of heat stability as well as molecular structural characteristics of 6-aminouracils, it was predicted that 6-aminouracils could stabilize PVC by an electrophilic reaction with PVC through their 6-C atom as the electrophilic center.This means that the classical Frye and Horst’s theory are not suitable for the heat stabilization mechanism of 6-aminouracils, and therefore, the exact mechanisms for this new heat stabilizer should be clarified in further work.
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URL: https://www.plaschina.com.cn/EN/10.19491/j.issn.1001-9278.2017.09.015
https://www.plaschina.com.cn/EN/Y2017/V31/I9/97