Accession Number:

ADA238879

Title:

Blends of Crystallizable Polybutadiene Isomers: Compatibilization by Addition of Amorphous Diblock Copolymer

Descriptive Note:

Technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING

Personal Author(s):

Report Date:

1991-07-24

Pagination or Media Count:

50.0

Abstract:

Precipitated blends of two crystallizable polybutadiene PBD isomers were characterized in terms of crystallization and phase behavior, morphology, and tensile mechanical properties. The isomers are syndiotactic 1,2 PBD and trans 1,4 PBD. As predicted by Flory-Huggins theory, the blends exhibit heterogeneous behavior over the full range of composition. Tensile properties of the crystalline blends are intermediate between those of the corresponding crystalline homopolymers, while tensile properties of the amorphous blends are generally worse than either of the amorphous homopolymers. But in both cases, property enhancement is evident at approximately 10 1,2 PBD content.

Subject Categories:

  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE