Preparation and Analysis of Thermal and Mechanical Properties of HTPB-type Polyurethane Elastomer Containing Paraffin Microcapsules

• 作者: Ding Hongjing Wang Lili Zhao Tianbo
• 来源期刊: 中国炼油与石油化工（英文版）
• 年，卷（期）: 2020,（3）
• 页码范围: 28-32
• 页数: 5页
• 语种: 英文

摘要

Two microcapsules with different paraffin phase changes were prepared using styrene–divinylbenzene copolymer and melamine resin as the capsule wall and paraffin (with a melting point of 50 °C) as the capsule core. The microcapsules were directly added to the hydroxyl terminated polybutadiene (HTPB)–polyurethane elastomer system to fabricate the polyurethane elastomer composites. The thermodynamic stability and mechanical properties of the material were then studied. The results show that the thermal stability of the polyurethane elastomer does not decrease after adding paraffin phase change microcapsules, and the thermal stability of the polyurethane elastomer with melamine resin as the wall increases. Tensile strength increased from 367 kPa to 797 kPa, and compression strength increased from 245.9 N to 344.7 N. In addition, capsule walls comprised different monomers/paraffin microcapsules of the copolymer of styrene and divinylbenzene. The optimal mechanical property was obtained at a monomer/paraffin ratio of 1:1. The compression strength increased and the tensile strength decreased. The tensile strength of the microcapsule with melamine resin capsule wall and the compression strength of the microcapsule with polystyrene capsule wall were considerably improved.