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Compatibilization of iPP/HDPE Blends with PE-g-iPP Graft Copolymers
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-07-29 , DOI: 10.1021/acsmacrolett.0c00339 Kristine Klimovica 1 , Sanshui Pan 2 , Ting-Wei Lin 1 , Xiayu Peng 2 , Christopher J Ellison 2 , Anne M LaPointe 1 , Frank S Bates 2 , Geoffrey W Coates 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-07-29 , DOI: 10.1021/acsmacrolett.0c00339 Kristine Klimovica 1 , Sanshui Pan 2 , Ting-Wei Lin 1 , Xiayu Peng 2 , Christopher J Ellison 2 , Anne M LaPointe 1 , Frank S Bates 2 , Geoffrey W Coates 1
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The compatibilization of polyethylene (PE) and isotactic polypropylene (iPP) blends is of particular interest due to the challenges associated with recycling these plastics from mixed waste streams. Polyethylene-graft-iPP copolymers (PE-g-iPP) were prepared using a grafting-through strategy by copolymerization of ethylene with allyl-terminated iPP macromonomers in the presence of a hafnium pyridylamido catalyst. Graft copolymers with a variety of graft lengths (Mn = 6–28 kg/mol), graft numbers, and graft spacings were prepared. These graft copolymers were melt-blended with high-density polyethylene (HDPE) and iPP (iPP/HDPE = 30/70 w/w), and the blend properties were evaluated by tensile testing. The blends showed enhanced tensile strength at 5 and 1 wt % loading, with higher tensile strength observed for larger block numbers and graft lengths. These results indicate that graft copolymers are efficient compatibilizers for blends of HDPE and iPP.
中文翻译：
iPP/HDPE 共混物与 PE-g-iPP 接枝共聚物的相容性
由于与从混合废物流中回收这些塑料相关的挑战，聚乙烯 (PE) 和全同立构聚丙烯 ( i PP) 共混物的相容性特别令人感兴趣。聚乙烯-接枝-i PP 共聚物(PE - g - i PP) 是通过乙烯与烯丙基封端的i PP 大分子单体在吡啶基氨基铪催化剂存在下共聚而采用接枝策略制备的。制备了具有各种接枝长度（Mn = 6-28 kg/mol）、接枝数和接枝间距的接枝共聚物。这些接枝共聚物与高密度聚乙烯 (HDPE) 和i PP (i PP/HDPE = 30/70 w/w)，并通过拉伸试验评估共混物性能。共混物在 5 和 1 wt% 负载下显示出增强的拉伸强度，对于较大的嵌段数和接枝长度观察到较高的拉伸强度。这些结果表明接枝共聚物是 HDPE 和i PP 共混物的有效增容剂。
更新日期：2020-08-18
中文翻译：
iPP/HDPE 共混物与 PE-g-iPP 接枝共聚物的相容性
由于与从混合废物流中回收这些塑料相关的挑战，聚乙烯 (PE) 和全同立构聚丙烯 ( i PP) 共混物的相容性特别令人感兴趣。聚乙烯-接枝-i PP 共聚物(PE - g - i PP) 是通过乙烯与烯丙基封端的i PP 大分子单体在吡啶基氨基铪催化剂存在下共聚而采用接枝策略制备的。制备了具有各种接枝长度（Mn = 6-28 kg/mol）、接枝数和接枝间距的接枝共聚物。这些接枝共聚物与高密度聚乙烯 (HDPE) 和i PP (i PP/HDPE = 30/70 w/w)，并通过拉伸试验评估共混物性能。共混物在 5 和 1 wt% 负载下显示出增强的拉伸强度，对于较大的嵌段数和接枝长度观察到较高的拉伸强度。这些结果表明接枝共聚物是 HDPE 和i PP 共混物的有效增容剂。
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