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Citation: LIU Yan-Long, KE Zhuo, YIN Li-Gang, SHI Qiang, YIN Jing-Hua. Combined Lewis Acids Catalysed in-situ Compatibilization of Poly(octene-ethylene) and Polystyrene Blends[J]. Chinese Journal of Applied Chemistry, ;2009, 26(10): 1129-1133. shu

Combined Lewis Acids Catalysed in-situ Compatibilization of Poly(octene-ethylene) and Polystyrene Blends

1.
State Key Laboratory of Polymer Physics and Chemistry, Changchun Insitute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Corresponding author: YIN Jing-Hua,
Received Date: 27 September 2008
Available Online: 10 December 2008
Fund Project: 国家自然科学基金重点(50833005) (50833005)国家自然科学基金青年基金(50803061)资助项目 (50803061)

A new type of combined catalyst of Lewis acids,Me₃SiCl and InCl₃·4H₂O,that can catalyze Friedel-Crafts alkylation reaction between POE and PS in the molten state was studied. The existence of grafted copolymer was testified by FTIR. SEM micrographs show that the size of the domains was decreased from 3～ 4 μm to less than 1 μm when the combined catalyst was added. Because the in-situ generated PS-g-POE copolymer could act as a compatibilizer in the blending system,the mechanical properties of the reacted blends were improved notably compared to that of the physical blends. For example,after compatibilization,the Izod impact strength of the m(POE):m(PS) blend (40:60) was increased from 1.9 kJ/m² to 9.7 kJ/m² and its elongation at break increased from 3.4% to 46.3%. The complex viscosity of the reacted blends within the low frequency range showed a higher value than that of the physical blends,indicating the increased interactions between POE and PS.
- reactive blend,
- compatibilization,
- graft copolymer,
- polyethylene octane copolymer,
- polystyrene
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