The dependence of miscibility on temperature for blends of poly(vinyl methyl ether) (PVME) and styrene-butadiene random copolymer (SBR) was studied. The binary interaction energy densities of the blends could be evaluated from the observed cloud point curves. With a simple approach based on the mean-field theory for blends of a homopolymer with a random copolymer, the miscibility boundary could be determined as a function of composition of the copolymer. The predicted miscibility region for the given polymer pairs was compatible with the experimental results.
Bibliographical noteFunding Information:
This work was supported by the Korea Science and Engineering Foundation (95-0501-08-01-3). We wish to thank Dr C. Baehr and Prof. T. Chang of POSTECH for computer programming and characterizing samples, respectively.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry