Synthesis and Characterization of Block Copolymers.

Abstract

Segmented (AB)n Polyurethanes; A series of polyether-polyurethane (PEPU) segmented block copolymers were synthesized and characterized. Soft segments were poly(propylene oxide) (PPO; Mn = 2,000) or poly(tetrahydrofuran) (PTHF; Mn = 1,650). Hard segments were formed from 4,4'-diphenylmethane diisocyanate (MDI) and different short chain diols as chain extenders. In the PPO series, 1-5-pentandiol (P). diethylene glycol (D), triethylene glycol (T) and 1,3-bis(N,N'-methyl-N,N'-2-hydroxyethyl)isophthalamide (Bi(M)) were used as chain extenders. In the PTHF series 1,6-bis(N,N'-2-hydroxy-ethyl)adipamide (A), Bi(M), D, T, bis(N,N'-2-hydroxyethyl)isophthalamide (Bi) and 1,6-bis(N,N'methyl-N,N'-2-hydroxy-ethyl)adipamide (A(M)) were used as chain extenders. By varying hard segment content, PEPU polymers with different properties were synthesized.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1987
Accession Number
ADA184405

Entities

People

  • James C. Chien
  • Jun-long Hong

Organizations

  • University of Massachusetts Amherst

Tags

DTIC Thesaurus Topics

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

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Engineering.

Technology Areas

  • Microelectronics