Heat Resistance Temperature Analysis Of PP Bottle
The reason is simple. PP is a typical semi-crystalline polymer, that is, in its aggregated structure, the crystalline region is dominated by a continuous phase, and the amorphous region contains relatively little content, which is a dispersed phase. The performance is mainly determined by the crystalline region, although the amorphous region has a non-negligible effect.
The melting point of the PP crystal region is about 135 degrees and 160 degrees, although its glass transition temperatures are about -67 degrees to 20 degrees. Because the crystal region is a continuous phase, it determines the product performance and also determines the maximum use temperature. The amorphous region, of course, is in a high elastic state, which also affects the performance, which is reflected in the better toughness.
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