Synthesis and Characterization of Temperature-Sensitive TSPU/PNIPAAm Semi-IPN Polymer

Abstract:

Thermo-sensitive polyurethane (TSPU) was synthesized from poly(ε-caprolactone) and 4,4’-methylenebis (phenyl isocyanate) by a two-step process with 1,4-butanediol as the chain extender. Following that, a novel temperature-sensitive material was created by the strategy of IPN from TSPU and PNIPAAm in the method of in situ polymerization. The chemical structure and thermo properties of the semi-IPN were characterized with FT-IR and DSC. The results prove that intensive inter-molecular interactions exist between TSPU and PNIPAAm chains, which have significant influence on the phase transition behaviors of the material. According to these results, the transition temperature of the semi-IPN can be adjusted in the range of 30~40 °C by controlling the composition of TSPU and the semi-IPNs.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 359-362
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.359
• Online since: November 2011
• Authors: Yi Chun Wang, Zheng Wei Dai, Yuan Xue
• Keywords: N-Isopropylacrylamide, Semi-IPN Polymer, Thermo-Sensitive Polyurethane

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