The Polypropylene has similar properties to polyethylene but has greater hardness and heat resistance than PE. The density of polypropylene is among the lowest of all plastic materials, ranging from 0.900 to 0.915.
Polypropylenes are perhaps the only thermoplastic that surpasses all others in combined electrical properties, heat resistance, rigidity, toughness, chemical resistance, dimensional stability, and surface gloss at a lower cost compared to other thermoplastic materials.
?Although polypropylenes are arranged spatially into Isotactic, Syndiotactic and Atactic, isotactic polypropylenes are the most common.
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