Investigation on novel thermoplastic poly(urethane-thiourea-imide)s with enhanced chemical and heat resistance

Ayesha Kausar, Sonia Zulfiqar, Cafer T. Yavuz, Muhammad Ilyas Sarwar

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A new generation of segmented thermoplastic poly(urethane-thiourea-imide)s (PUTIs) was synthesized via reaction of polyethylene glycol and thiourea-based prepolymer with dianhydride as chain extenders. NCO-terminated prepolymer was synthesized from a new diisocyanate, 3-(3-((4-isocyanatophenyl)carbamoyl) thioureido)phenyl-4-isocyanatophenylcarbamate (IPCT), as a hard segment and PEG forming soft segment. The starting materials and polymers were characterized by conventional methods and physical properties such as solubility, solution viscosity, molecular weight, thermal stability and thermal behavior were studied. PUTIs showed partially crystalline structures. Weight average molecular weights of PUTIs (GPC measurements) were in the range of 1,68,694-1,97,035. Moreover, thermogravimetric analysis indicated that poly(urethane-thiourea- imide)s were fairly stable above 500 °C having T10 of 521-543 °C. Investigation of the results authenticated the approach of introducing thiourea (using IPCT) and imide structure in polyurethanes for the improvement of thermal stability. In comparison to typical polyurethanes, these polymers exhibited better heat resistance, chemical resistance as well as processability. © 2011 Elsevier Ltd. All rights reserved.
Original languageEnglish (US)
Pages (from-to)1333-1341
Number of pages9
JournalPolymer Degradation and Stability
Volume96
Issue number7
DOIs
StatePublished - Jul 1 2011
Externally publishedYes

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Mechanics of Materials
  • Condensed Matter Physics

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