The experimental results showed that TPI was easy to degrade, its relative molecular mass, melt point and crystallinity degree decreased with the increase of aging time.
结果表明，TPI极易老化，其相对分子质量随老化时间的延长而迅速降低，熔点及结晶度也逐渐降低。
The experimental results showed that TPI was easy to degrade, its relative molecular mass, melt point and crystallinity degree decreased with the increase of aging time.
结果表明，TPI极易老化，其相对分子质量随老化时间的延长而迅速降低，熔点及结晶度也逐渐降低。
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