Synthesis and Characterization of Block Copolymers.

Abstract

Polyether-Polyimide Block Copolymers; Three series of Polyether-Polyimide (PEPI) block copolymers were synthesized. Soft segments were poly(propylene glycol) (PPO) Mn = 2,000 and 4,000. Hard segments were pyromellitic dianhydride (PMDA) and di-(2-hydroxyethyl)-dimethylhydantoin (H). The hard segments were formed from 4,4'-diphenylmethane disocyanate (MDI) with PMDA or 95% PMDA and 5% H. The first series designated as PEPI-2K was synthesized with PPO-2,000, MDI and PMDA. The second series, PEPI-2KH, used PPO-2,000, MDI, 95% PMDA+ 5% H. The third series, PEPI-4K, used PPO-4,000, MDI and PMDA. PEPI copolymers in each series varied by weight percent of hard segment.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1987
Accession Number
ADA184406

Entities

People

  • C. F. Chu
  • James C. Chien

Organizations

  • University of Massachusetts Amherst

Tags

DTIC Thesaurus Topics

  • Alkenes
  • Biomedical And Dental Materials
  • Block Copolymers
  • Copolymers
  • Ethylene Glycol
  • Glass Transition Temperature
  • Glycols
  • Low Temperature
  • Mechanical Properties
  • Modulus Of Elasticity
  • Phase
  • Phase Separation
  • Polyethylene Glycols
  • Polymeric Films
  • Polymers
  • Transition Temperature
  • Transitions

Readers

  • Polymer Science and Engineering.

Technology Areas

  • Microelectronics