A facile, green, versatile protocol to prepare polypropylene-g-poly(methyl methacrylate) copolymer by water-solid phase suspension grafting polymerization using the surface of reactor granule technology polypropylene granules as reaction loci

作者：Li, Zhuo; Ma, Yuhong; Yang, Wantai^*

来源：Journal of Applied Polymer Science, 2013, 129(6): 3170-3177.

DOI：10.1002/app.39037

• grafting
• radical polymerization
• polyolefins
• porous materials
• compatibilization

A facile and environment friendly process, called water-solid phase suspension grafting polymerization, was developed to prepare polypropylene-g-poly(methyl methacrylate) (PP-g-PMMA) copolymer with a submicrometer microdomain. In this approach, graft polymerization was elaborately regulated to occur within micropores of polypropylene particles prepared by reactor granule technology. FTIR spectra of the samples after extraction demonstrated that PMMA was successfully grafted onto the PP. The results showed grafting percentage (GP) of PMMA increased with the increasing monomer ratios to PP and that could reach 13.6%. Whereas the grafting efficiency decreased as the monomer ratio increased. The addition of second monomer styrene improved GP up to 24.5%. Differential Scanning Calorimetry tests showed that the grafting of PMMA have a slight effect on the melting point and the relative crystallinity of PP. TEM micrographs demonstrated PMMA domains distributed in PP matrix with sizes ranging from about 100 to 300 nm. In addition, Shear viscosity increased with the growing GP indicated by rheological measurement. The preliminary evaluation showed PP-g-PMMA was effective in improving the compatibility of PP/acrylonitrile-styrene-acrylate blends.

• 出版日期2013-9-15
• 单位北京化工大学