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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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碳纳米球/聚乙烯复合物的制备与表征
DOI: 10.3724/SP.J.1105.2014.13354, PP. 686-691
Keywords: 碳纳米球,负载型Ziegler-Natta催化剂,聚乙烯/碳纳米球复合物,核-壳结构
Abstract:
以碳纳米球为载体，经格氏试剂处理后，与TiCl4反应制成负载型Ziegler-Natta催化剂，在AlEt3存在下，催化乙烯聚合，原位制备聚乙烯（PE）/碳纳米球（CSs）复合物，催化剂活性达5.7×106gPE/（molTi·h），聚乙烯分子量为4.9×105.HRTEM和SEM结果表明，常压聚合条件下聚乙烯/CSs复合物为核-壳结构，颗粒呈圆形，直径约为1μm左右，复合物颗粒中包含碳纳米球.介电分析结果表明，由于碳纳米球的引入，复合物的介电性能相较于普通聚乙烯有明显的提高，从而提高了聚乙烯的抗静电性能，且介电常数和介电损耗都随着聚合时间的延长而降低.此外，采用WAXD，DSC和TGA表征了PE/CSs复合物的结晶性能和热性能，结果表明聚乙烯/CSs复合物具有好的结晶性能和热稳定性能.
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