Compatibilization of iPP/HDPE Blends with PE-g-iPP Graft Copolymers

被引：90

作者：

Klimovica, Kristine ^{[1
]}

Pan, Sanshui ^{[2
]}

Lin, Ting-Wei ^{[1
]}

Peng, Xiayu ^{[2
]}

Ellison, Christopher J. ^{[2
]}

LaPointe, Anne M. ^{[1
]}

Bates, Frank S. ^{[2
]}

Coates, Geoffrey W. ^{[1
]}

机构：

[1] Cornell Univ, Baker Lab, Dept Chem & Chem Biol, Ithaca, NY 14853 USA

[2] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

来源：

ACS MACRO LETTERS | 2020年 / 9卷 / 08期

关键词：

HIGH-DENSITY POLYETHYLENE; OLEFIN BLOCK-COPOLYMERS; POLYMER BLENDS; VINYL-CHLORIDE; POLYPROPYLENE; MORPHOLOGY;

D O I：

10.1021/acsmacrolett.0c00339

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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 (M-n = 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.

引用

页码：1161 / 1166

页数：6

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