Abstract: Anovel CNBR/PPthermoplastic elastomer was prepared by using reactive blending method.Here, a plain PPand a fully cross-linked acrylonitrile-butadiene rubber powders(CNBR) with nanometer dimension and carboxylic end-groups were used as the blending components.And a polypropylene functionalized with glycidyl methacrylate(PP-g-GMA) was used as a compatibilizer.Their morphologies were examined by using AFMAnd TEM.It was found that the size of CNBR dispersed phase of the compatibilized blending system was much smaller and its distribution was much more homogeneous than that of the related uncompatibilized blends.Comparing with the uncompatibilized blends, mechanical properties of compatibilized blends were obviously improved at the same compositions.The DSC data indicated that the crystallization temperature of PPin compatibilized blendSIncreased about 10℃. It could be tentatively explained as that the dispersed CNBR particles or the reactive product formed on the interface of two phase acted as a kind of nucleating agent.

Key words: Acrylonitrile-butadiene rubber powder, Functionalized polypropylene, Thermoplastic elastomer, Reactive compatibilization, Morphology and structure, Property