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Physical Properties and Microphase Separation of Polyurethane Films Containing Poly(dimethyl siloxane) Component
- Authors
- Ra, Sang Hee; Lee, Hee Dong; Kim, Young Ho
- Issue Date
- Jul-2015
- Publisher
- POLYMER SOC KOREA
- Keywords
- polyurethane; poly(dimethyl siloxane); mechanical properties; phase separation; SAXS
- Citation
- POLYMER-KOREA, v.39, no.4, pp.579 - 587
- Journal Title
- POLYMER-KOREA
- Volume
- 39
- Number
- 4
- Start Page
- 579
- End Page
- 587
- ISSN
- 0379-153X
- Abstract
- Polyurethanes (PUs) containing poly(dimethyl siloxane) (PDMS) unit in soft segment, PU-Si, were synthesized, and their mechanical properties and phase separation were investigated. Various amounts of PDMS units were incorporated into PU via a solution polymerization method in N,N'-dimethylformamide using poly(tetramethylene ether glycol) and PDMS diol as a soft segment and methylene diphenyl diisocyanate and 1,4-butanediol as a hard segment. Two series of PU-Si samples with an HS content of 23% and 32% were prepared and analyzed. Results showed that the elongation-at-break of the PU-Si films increased, breaking stress decreased, and the hydrophobicity of the film increased as the PDMS content in PU-Si increased. SAXS analysis indicated that the microphase separation of the PU-Si film between hard and soft segments decreased with increasing PDMS content, irrespective of the HS content.
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Related Researcher
- Kim, Young Ho
- Department of Organic Materials and Fiber Engineering