Citation: Hai-yue Qiu, Fang Chen, Zhao-xia Guo, Jian Yu. Preparation of Polypropylene/Poly(styrene-co-(butyl methacrylate)) Nanoblends by Diffusion and Subsequent Copolymerization of Monomers in Isotactic Polypropylene Pellets[J]. Chinese Journal of Polymer Science, ;2015, 33(10): 1380-1388. doi: 10.1007/s10118-015-1686-z shu

Preparation of Polypropylene/Poly(styrene-co-(butyl methacrylate)) Nanoblends by Diffusion and Subsequent Copolymerization of Monomers in Isotactic Polypropylene Pellets

1.
Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received Date: 16 March 2015
Revised Date: 9 April 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 51173095).

The diffusion and subsequent copolymerization of styrene (St)/butyl methacrylate (BMA) mixed monomers in iPP pellets to prepare copolymer nanoblends were investigated. The diffusion step was carried out at 90 ℃ for 2 h in water, and the copolymerization was initiated by the addition of BPO with the aid of a small amount of St. The diametrical distributions of both St and BMA units and their ratio St/BMA were investigated by micro FTIR. Both St and BMA can diffuse into the centres of iPP pellets. The diametrical distribution of St/BMA ratio is constant in all the copolymer blends. The copolymer composition depends on the comonomer feed ratio. The molecular weights of the copolymers were measured by GPC after extraction with tetrahydrofuran. The phase morphology of the copolymer blends was investigated by FESEM, showing the average particle sizes of less than 100 nm. DSC measurements show that the diffusion and subsequent copolymerization of St/BMA monomers only occur in the amorphous regions of iPP pellets.
- Polypropylene,
- Polymer blend,
- Diffusion,
- Copolymerization
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1.
沈阳化工大学材料科学与工程学院沈阳 110142