The Combined Effect of the Soft Segment Structure and the Grafted Side Chains on the Thermal Properties and Low-temperature Flexibilities of Polyurethane. (1st November 2016)

• Record Type: Journal Article
• Authors: Chung, Yong-Chan; Jo, Suhyeon; Lee, Byung Hee; Choi, Jae Won; Chun, Byoung Chul
• Is Part Of: Polymer-plastics technology and engineering. Volume 55:Number 16(2016)
• Page Start: 1720
• Page End: 1730
• Publication Date: 2016-11-01
• Subjects: 2-Ethylhexyl acrylate -- butyl acrylate -- graft polymerization -- grafting -- PDMS; Polymers -- Periodicals; Polymerization -- Periodicals; Polymers -- Periodicals; Engineering -- Periodicals; Plastics -- Periodicals; 668.9
• DOI: 10.1080/03602559.2016.1163600
• Languages: English
• ISSNs: 0360-2559

Abstract

ABSTRACT: Polyurethanes containing polycaprolactone diol or poly(tetramethylene ether)glycol as a soft segment and 4, 4′-methylenebis(phenyl isocyanate) as a hard segment were used as a polymer frame. Polydimethylsiloxane was grafted onto polyurethanes to reduce the molecular interactions and to improve the mobility of polyurethanes, and the plasticizing groups, n -butyl and 2-ethylhexyl, were attached to polyurethanes by graft polymerization. With an increase in the polydimethylsiloxane content, the T g of the polydimethylsiloxane–polyurethanes gradually increased, whereas the T g of the n -butyl and 2-ethylhexyl-attached polyurethanes was not affected by a change in their composition. The polydimethylsiloxane-grafted polyurethanes demonstrated excellent tensile strength, shape recovery, and low-temperature flexibility. GRAPHICAL ABSTRACT: