Materials: Impact modifier helps TPOs balance stiffness, toughness  

Oleh:

Deligio, Tony

Jenis: Article from Bulletin/Magazine - ilmiah internasional
Dalam koleksi: Modern Plastics Worldwide vol. 86 no. 10 (Dec. 2009), page 18.
Topik: Dow Chemical; Impact Modifier; Thermoplastic Olefins (TPOs)

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Perpustakaan Pusat (Semanggi) Nomor Panggil: MM68.8 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Dow Chemical (Midland, MI) is in the process of commercializing a new impact modifier for rigid thermoplastic olefins (TPOs) that will increase their flexural modulus without affecting low-temperature impact resistance, allowing designers to downgauge parts without sacrificing mechanical properties. In a paper presented at the Society of Plastics Engineers’ Automotive TPO Conference, Dow’s Kim Walton said the new impact modifier, which will join the Engage family of products, showed 15-20% greater impact efficiency than best-in-class commercial ethylene/1-octene copolymers, with equivalent low-temperature high-speed dart impact results and 15% higher modulus as SEBS block copolymers in TPOs at equivalent levels. In late October, Dow Chemical Market Manager Dave Mitchell told MPW that the latest member of the Engage family had completed internal testing, and was currently being validated at several automotive customers, with commercialization expected in the fourth quarter. Walton and Mitchell said the impact modifier’s higher level of performance is primarily derived from improvements in its compatibility with polypropylene (PP), allowing what they call “optimum dispersion” and a greater balance in stiffness/toughness properties.

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