Morphology and properties of poly(benzoxazine‐co‐urethane)s based on bisphenol‐S/aniline benzoxazine. Issue 12 (30th March 2013)

• Record Type: Journal Article
• Authors: Li, Zhihong; Liu, Yanfang; Zhang, Jie; Zhao, Shasha; Luo, Shanshan; Yue, Zaiqin; Run, Mingtao
• Is Part Of: Polymer engineering & science. Volume 53:Issue 12(2013:Dec.)
• Page Start: 2633
• Page End: 2639
• Publication Date: 2013-03-30
• Subjects: Polymer engineering -- Periodicals; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pen.23520
• Languages: English
• ISSNs: 0032-3888

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Poly(benzoxazine‐<italic>co</italic>‐urethane) was prepared by melt‐blending bisphenol‐S/aniline‐type benzoxazine (BS‐a) with isocyanate‐terminated polyurethane (PU) prepolymer based on 2, 4‐toluene diisocyanate and poly(ethylene glycol), followed by thermally activated polymerization of the blend. The copolymerization reaction between BS‐a and PU prepolymer was monitored using Fourier transform infrared spectroscopy. The morphology, dynamic mechanical properties, and thermal stability of the poly(benzoxazine‐<italic>co</italic>‐urethane) were studied using scanning electron microscopy, dynamic mechanical analysis, and thermogravimetry. Homogeneous morphology is shown in scanning electron micrographs of the fracture surfaces of poly(benzoxazine‐<italic>co</italic>‐urethane)s with different urethane weight fractions, and the roughness of the surface increases with urethane content increasing. Correspondingly, a single glass transition temperature (<italic>T</italic><sub>g</sub>) is shown on the dynamic mechanical analysis curves of the poly(benzoxazine‐<italic>co</italic>‐urethane)s, and the <italic>T</italic><sub>g</sub> is higher than that of the polybenzoxazine. With increase in the urethane content, the <italic>T</italic><sub>g</sub> and water absorption of poly(benzoxazine‐<italic>co</italic>‐urethane) increase, whereas the storage modulus and thermal stability decrease. POLYM. ENG. SCI., 53:2633–2639, 2013. © 2013 Society of Plastics Engineers</p> </abstract>