Citation: Wei-jia Wang, Cheng-huan Huang, Zhao-xia Guo, Jian Yu. Preparation of POE/PS Blends with Fine Particle Sizes by Diffusion and Subsequent Polymerization of Styrene in POE Pellets[J]. Chinese Journal of Polymer Science, ;2017, 35(8): 939-949. doi: 10.1007/s10118-017-1955-0 shu

Preparation of POE/PS Blends with Fine Particle Sizes by Diffusion and Subsequent Polymerization of Styrene in POE Pellets

Key Laboratory of Advanced Materials(Ministry of Education), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: Zhao-xia Guo, guozx@mail.tsinghua.edu.cn Jian Yu, yujian03@mail.tsinghua.edu.cn
Received Date: 9 February 2017
Revised Date: 20 March 2017
Accepted Date: 22 March 2017

Fund Project: the National Natural Science Foundation of China 51173095

Ethylene-α-octene copolymer (POE)/polystyrene (PS) blend pellets with fine particle sizes were prepared by diffusion and subsequent polymerization of styrene in POE pellets through a one-pot procedure. The effects of the amounts of styrene and BPO on PS content, monomer efficiency and monomer conversion were investigated. The blend pellets were characterized by Micro-FTIR and FESEM, showing homogeneous diametrical distributions of PS and particle size. After melt-processing into rods, the average particle sizes are almost doubled, but still in submicron scale. Compared to neat POE rods, the blend rods with PS content higher than 15% exhibit improved tensile modulus and tensile strength without significantly losing ductility, being attributed to the small sizes, complex nature of particles and the existence of POE-g-PS copolymer that result in good interfacial adhesion. POE/PS pellets were compared with the previously reported PP/PS pellets, and the differences between the two systems are attributed to the different morphology of the two matrices:POE is completely amorphous at the diffusion and polymerization temperature, while iPP is semicrystalline. Without efficient impediment of the crystal lamellae in POE pellets, styrene diffuses easily in POE pellets.
- Blends,
- Mechanical properties,
- Nanostructured polymers,
- Polystyrene
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