Influence of Acrylonitrile-styrene Copolymer on the Thermal Stability of Polyoxymethylene Resin

doi:10.7503/cjcu20150141

Abstract

Abstract:

The influence of acrylonitrile-styrene(AS) copolymer on the thermal stability of polyoxymethylene(POM) resin was studied. It was shown that, under dynamic melt blending conditions, the thermal stability of POM melt and the molten residence time could be significantly improved by adding just a small amount of AS, and the optimal mass fraction is 3%. Under static heating conditions, the addition of AS leads to a significant increase in decomposition temperature of POM system during the elevated temperature process, and an apparently decrease in the mass loss rate during the constant temperature process. In both dynamic and static conditions, the contribution of AS to the thermal stability of POM is similar, and the effect is even more signi-ficant by the combined use of AS and melamine. IR analysis revealed that the mechanism of the thermal stabilization of POM resin is the efficient absorption of formaldehyde by the -CN groups of AS copolymer.

Key words: Polyoxymethylene, Acrylonitrile-styrene(AS) copolymer, Thermal stability

CLC Number:

O631

TrendMD:

LIU Jingwei, GUO Zhaoxia, YU Jian. Influence of Acrylonitrile-styrene Copolymer on the Thermal Stability of Polyoxymethylene Resin[J]. Chem. J. Chinese Universities, 2015, 36(9): 1853.

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