Volume 95 Issue 9 | p. 10 | Concentrates
Issue Date: February 27, 2017

Welding immiscible polyethylene and isotactic polypropylene

Pyridylamidohafnium catalyst produces a tetrablock copolymer that holds these popular plastics together
Department: Science & Technology
News Channels: Materials SCENE, Environmental SCENE
Keywords: polymers, polyethylene, isotactic polypropylene

Polyethylene (PE) and isotactic polypropylene (iPP) account for nearly two-thirds of the world’s plastic—adding up to $200 billion in annual sales worldwide. When melted together, PE and iPP are immiscible and form a brittle material. So they tend to get recycled into lower-value products because of the expense associated with sorting them from one another. Now, researchers led by Cornell University’s Geoffrey W. Coates, Anne M. LaPointe, . . .

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