Properties Study Of Polyurethane/nanoCaCO₃ Composite

This paper aims at studying the development nano materials and considering from economy. And n-CaCO₃ were used to reinforce polyurethane. Polyurethane n-CaCO₃ composite materials' properties are studied due to the outstanding performanceof polyurethane and n-CaCO3.In this paper, based on polytetramethylene(PTMG) and diisocyanate( TDI), polyether urethane elastomers is synthesized from polytetrahydr of-uran and aromaticdiamine MOCA as crosslinking agent in the preparation. And to be more reinforce polyurethane, n-CaCO3 were prepared. The altering of the surface character of n-CaCO3 and the introducing of ultrasonic promoted the dispersion of n-CaCO3. The synthetic technology, mechanical properties, thermai resistance and erosion wear resistance of polyurethane nano composite are studied in this article. The morphology of abrasion surface and the mechanism of abrasion are analyzed by SEM technology.The testing results show that polyurethane composite materials have higher mechanical properties, thermal resistance and erosion wear resistance than polyurethane;Composite materials have the best properties when n-CaCO3 content is 3%;the synthetic temperature, the content of dissociative -NCO and the type of keying agents all haveeffects on the properties of the composire. SEM show that: nano particles were not better dispersed but reunite in this system;The mechanism of polyurethane ceramic composite materials are lossed by plastic deform, microcutting, cracking and ripping of ceramic powders masses gathering and masses re-gathering.