Accession Number : ADA133069

Title :   Homopolymer-Induced Microphase Separation of a Homogeneous Diblock Copolymer.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Cohen,Robert E ; Torradas,Jose M

PDF Url : ADA133069

Report Date : 29 Aug 1983

Pagination or Media Count : 14

Abstract : Binary polymer blends were prepared from a homogeneous diblock copolymer (1,2 polybutadiene-1,4 polybutadiene) and either of the corresponding homopolymers. Using dynamic mechanical testing and transmission electron microscopy it was shown that the 1,4B homopolymer and the copolymer form homogeneous blends; however, addition of 1,2B homopolymer induces a heterogeneous morphology when present in sufficient proportions. The nature of this homopolymer-induced microphase separation is compared to predictions of a recent theory.

Descriptors :   *Polymers, *Synthesis(Chemistry), Morphology, Homogeneity, Polybutadiene, Block copolymers, Binary compounds, Preparation, Separation

Subject Categories : Polymer Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE