Hydrogenated poly(styrene-co-α-methylstyrene) polymers: A new class of high glass-transition-temperature polyolefins

Jing J. Xu, Binh T. Nguyen, Frank S. Bates, Stephen F. Hahn, Michelle L. Hudack

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We demonstrate a method to prepare high glass-transition-temperature (Tg) materials with a two-step process - anionic copolymerization of α-methylstyrene with styrene (leading to copolymers referred to as SAMS), with subsequent catalytic hydrogenation. The product, poly(cyclohexyl ethylene-co-2-cyclohexyl propylene), is referred to as PCEPx, where the subscript denotes the molar percentage of 2-cyclohexyl propylene units in the copolymer. PCEPx exhibits Tg values between 140 and 178 °C depending on the composition and composition distribution in the polymerization product. To increase the toughness of PCEPx, we copolymerized SAMS with butadiene followed by hydrogenation to form PCEPx/PEEy block copolymers, where PEEy refers to poly(ethylene-co-ethyl ethylene), and γ denotes the molar percentage of ethyl ethylene segments. Tg values as high as 162 °C were achieved for these block copolymers.

Original languageEnglish (US)
Pages (from-to)725-735
Number of pages11
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume41
Issue number7
DOIs
StatePublished - Apr 1 2003

Keywords

  • Block copolymers
  • Copolymerization
  • Glass transition
  • Hydrogenation
  • Poly(cyclohexyl ethylene-co-2-cyclohexyl propylene) (PCEP)

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