The Effect of Nano- and Micro-Fillers on the Strength and Toughness of PIR Foams Obtained From Renewable Resources
Low-density rigid polyisocyanurate (PIR) foams obtained from renewable resources (with the polyol system comprising up to 80% of rapeseed oil esters) have been produced and tested for strength and fracture toughness in a range of foam density of importance for practical applications. In order to enhance the mechanical characteristics of the foams, the effect of several nano- and micro-fillers has been investigated experimentally. It is demonstrated that nano-fillers, such as organically modified nanoclays, carbon nanotubes, ZnO nanoparticles, increase both the strength and toughness of the foams whereas such micro-fillers as milled carbon fibers, while providing substantial increase in stiffness, have little effect on foam strength and toughness. Scaling models relating filled solid polymer properties to those of the filled foams have been considered and shown to have a predictive potential.
polymer foams strength toughness nanoclay carbon fibers
Janis Andersons Ugis Cabulis Uldis Stirna
Institute of Polymer Mechanics,University of Latvia,Riga LV-1006,Latvia Latvian State Institute of Wood Chemistry,Riga LV-1006,Latvia
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）