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thermal degradation
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nature : polymer in the heating by the degradation reaction. Thermal degradation reactions are of three kinds : (a) heating side-elimination, such as heating dehydrochlorination of PVC, poly vinyl acetate from acid, which was characterized with the increased heating temperature or time extension, the elimination reaction intensified, color Browning, but in general the main chain is not broken and little impact on performance ; (2) Random degradation, heating polymer main chain from the Central Office weak bond fracture, such as polyethylene, polypropylene thermal degradation. Its molecular weight is characterized by decreased state variable Nien, mechanical properties decreased substantially, but little change in quality; (3) faces zipper â–?degradation of the polymer chain from start-degradable, like faces zipper â–?as a degraded as a monomer. If PMMA and thermal degradation of PTFE fall into this category.


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More Detailed Data:
1) thermal degradation
2) degradation
3) degradation
4) degradation
5) heat drop
6) heat
7) heat
8) heat
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