Preprint Article Version 1 This version is not peer-reviewed

Improving Thermal Stability of Polyurethane through the Addition of Hyperbranched Polysiloxane

Version 1 : Received: 1 March 2019 / Approved: 4 March 2019 / Online: 4 March 2019 (13:38:01 CET)

A peer-reviewed article of this Preprint also exists.

Liu, S.-H.; Shen, M.-Y.; Kuan, C.-F.; Kuan, H.-C.; Ke, C.-Y.; Chiang, C.-L. Improving Thermal Stability of Polyurethane through the Addition of Hyperbranched Polysiloxane. Polymers 2019, 11, 697. Liu, S.-H.; Shen, M.-Y.; Kuan, C.-F.; Kuan, H.-C.; Ke, C.-Y.; Chiang, C.-L. Improving Thermal Stability of Polyurethane through the Addition of Hyperbranched Polysiloxane. Polymers 2019, 11, 697.

Journal reference: Polymers 2019, 11, 697
DOI: 10.3390/polym11040697

Abstract

Polydimethylsiloxane with hydroxy groups was functionalized to form functionalized polydimethylsiloxane, which subsequently underwent an addition reaction with isophorone diisocyanate to form the prepolymer. Next, 3-aminopropyltriethoxysilane (APTS) reacted with 3-glycidoxypropyltrimethoxysilane (GPTS) to produce bridged polysilsesquioxanes, and the sol–gel technology was employed to form hyperbranched polysiloxane nanoparticles with hydroxy groups, which was used as the additive. The hyperbranched polysiloxane and the prepolymer containing NCO functional groups then underwent an addition reaction to produce the hybrid materials. Fourier-transform infrared spectroscopy and 29Si nuclear magnetic resonance were used to characterize the structure of the polyurethane hybrid. Regarding thermal stability, after the hyperbranched polysiloxane nanoparticles was introduced, the integral procedural decomposition temperature increased from 348 ºC for polyurethane matrix to 859 ºC for the hybrid material. The results revealed that the thermal stability of the hybrid material substantially increased by approximately 247%.

Subject Areas

polyurethane (PU), siloxane, sol–gel technology, thermogravimetric analysis, thermal stability

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