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Citation: GONG Ya-Feng, ZHANG Zi-Yong, ZHANG Ai-Feng. Dual Grafting of MAH/styrene onto Polypropylene Using Supercritical CO₂ Fluid[J]. Chinese Journal of Applied Chemistry, ;2004, 21(9): 914-917. shu

Dual Grafting of MAH/styrene onto Polypropylene Using Supercritical CO₂ Fluid

1.
Department of Chemistry, College of Life Science and Technology, Jinan University, Guangzhou 510632

Corresponding author: ZHANG Zi-Yong,
Received Date: 31 October 2003
Available Online: 10 April 2004
Fund Project: 广东省自然科学基金(021198)资助项目 (021198)

Free-radical dual grafting of maleic anhydride(MAH) and styrene(St) onto granular polypropylene(PP) using supercritical CO₂ as a solvent and swelling agent has been studied and PP-g-(MAH-St) prepared. The effect of molar ratio of monomers, swelling temperature and time, reaction time and pressure on the grafting density are discussed. It is found that the St as a co-monomer in the grafting reaction system could significantly enhance the grafting density of PP for MAH and St on PP. The maximum grafting density for PP-g-(MAH-St) in supercritical CO₂ fluid under optimal reaction conditions was 10.58%, two times that for PP-g-MAH. The process is simpler than regular graft polymerization processes. The structures and properties of the graft copolymers were characterized by FTIR and DSC. The results indicate that styrene branch chains reduces the T_m of PP from 158℃ to 154℃.
- polypropylene,
- graft,
- supercritical CO₂,
- styrene,
- maleic anhydride
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Dual Grafting of MAH/styrene onto Polypropylene Using Supercritical CO2 Fluid

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通讯作者: 陈斌, bchen63@163.com

Dual Grafting of MAH/styrene onto Polypropylene Using Supercritical CO₂ Fluid