Block Copolymers of Isotactic Polypropylene and 1,4 Polybutadiene.

Abstract

Two block copolymers of isotactic polypropylene and 1,4 polybutadiene were synthesized using techniques involving a transformation from anionic to Ziegler-Natta polymerization mechanisms. The yield of block copolymer was about fifteen percent (weight basis) in both polymerizations, the remainder being unreacted polybutadiene from the first block synthesis. Molecular characterization experiments and model reactions were consistent with a block-like structure for the copolymers; definitive evidence for the proposed molecular structure was obtained through transmission electron microscopy which clearly revealed microphase-separated morphologies characteristic of block copolymers. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 24, 1985
Accession Number
ADA160147

Entities

People

  • M. A. Drzewinski
  • Robert E. Cohen

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Alcohols
  • Biomedical And Dental Materials
  • Block Copolymers
  • Butadienes
  • Chemical Engineering
  • Chemistry
  • Copolymers
  • Electron Microscopes
  • Electron Microscopy
  • Materials
  • Materials Science
  • Microscopy
  • Molecular Weight
  • Physical Properties
  • Polybutadiene
  • Synthetic Rubber
  • Transmission Electron Microscopy

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology

Technology Areas

  • Microelectronics