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POLYETHYLENES HAVING FASTER CRYSTALLIZATION RATE AND IMPROVED ENVIRONMENTAL STRESS CRACKING RESISTANCE
POLYETHYLENES HAVING FASTER CRYSTALLIZATION RATE AND IMPROVED ENVIRONMENTAL STRESS CRACKING RESISTANCE
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机译:聚乙烯具有更快的结晶速率和改善的抗环境应力开裂性
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摘要
Disclosed is a polyethylene composition having faster crystallization rate and improved environmental stress cracking resistance. The polyethylene composition comprises a multimodal polyethylene and a nucleating agent. The multimodal polyethylene comprises from 25 to 50 wt % of a low molecular weight ethylene homopolymer component, from 25 to 50 wt % of a medium molecular weight ethylene copolymer component and from 25 to 50 wt % of a high molecular weight ethylene copolymer component. The polyethylene composition has an environmental stress cracking resistance (ASTM D1693, Condition B in 100% Igepal) greater than or equal to 40 days and a crystallization half time less than or equal to 70% of the crystallization half time of the multimodal polyethylene without nucleating agent.
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