Study on creep property of polyurethane composites

Abstract

This paper mainly investigates the creep property of polyurethane composites. The polyurethane composites with different structures are first prepared and experiments are subsequently carried out to study their creep property in terms of molecular weight of soft segments, isocyanate structure and cross-linking degree. The results show that the creep property gradually gets poorer with the increase of molecular weight of soft-segment polyols. The isocyanate molecule features a well-defined structure, and better anti-creep property of polyurethane materials can be observed in better orderly arranged molecular chains. Besides, higher cross-linking degree would lead to better anti-creep property of the polyurethane materials. As a result, the experimental result suggests a reasonable formula when designing to improve the anti-creep property of polyurethane materials.

Keywords:

• Creep
• Polyurethane composite
• Cross-linking degree
• Molecular weight
• Isocyanate structure