An Investigation on Polypropylene Degradation in Supercritical Water Adding Benzoyl Peroxide

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An Investigation on Polypropylene Degradation in Supercritical Water Adding Benzoyl Peroxide

SU Lei^a,b; WU Xuehua^a,c; LIU Xiuru^a; CHEN Liying^a; CHEN Keyu^d; HONG Shiming^a

^aLaboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031, China
^b Department of Physics, Zhengzhou University of Light Industry, Zhengzhou 450002, China
^c College of Science, Kunming University of Science and Technology, Kunming 650093, China
^d Department of Polymer Science and Technology, Sichuan University, Chengdu 610065, China

Received:1900-01-01 Revised:1900-01-01 Online:2005-12-28 Published:2005-12-28
Contact: SU Lei

超临界水中添加过氧化苯甲酰对聚丙烯降解的促进作用

苏磊^a,b; 吴学华^a,c; 刘秀茹^a; 陈丽英^a; 陈克宇^d; 洪时明^a

^a Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031, China
^b Department of Physics, Zhengzhou University of Light Industry, Zhengzhou 450002, China
^c College of Science, Kunming University of Science and Technology, Kunming 650093, China
^d Department of Polymer Science and Technology, Sichuan University, Chengdu 610065, China

通讯作者:
苏磊

Abstract

Abstract: The effect of benzoyl peroxide （BPO） on polypropylene （PP） degradation in supercritical water was investigated with the aim of developing a process for recycling of waste plastics. A series of experiments with and without BPO were carried out at temperatures of 653 K and 673 K under pressure about 26MPa for 30, 75 and 120 min respectively. Products were analyzed by an Ostward-type viscometer, gas chromatography and spectrometry （GC/MS） etc. The results indicated that mean molecular weight of the samples decreased greatly along with the time elapsing or with the temperature increasing, and PP was decomposed to Miphatic and cycloparaftinic hydrocarbons but a few benzenoid hydrocarbons. By comparing the experiments with and without BPO, it was made clear that BPO is an effective additive on PP degradation in supercritical water.

Key words: vsupercritical water, polypropylene degradation, benzoyl peroxide

摘要： The effect of benzoyl peroxide （BPO） on polypropylene （PP） degradation in supercritical water was investigated with the aim of developing a process for recycling of waste plastics. A series of experiments with and without BPO were carried out at temperatures of 653 K and 673 K under pressure about 26MPa for 30, 75 and 120 min respectively. Products were analyzed by an Ostward-type viscometer, gas chromatography and spectrometry （GC/MS） etc. The results indicated that mean molecular weight of the samples decreased greatly along with the time elapsing or with the temperature increasing, and PP was decomposed to Miphatic and cycloparaftinic hydrocarbons but a few benzenoid hydrocarbons. By comparing the experiments with and without BPO, it was made clear that BPO is an effective additive on PP degradation in supercritical water.

关键词: 超临界水;过氧化苯甲酰;聚丙烯;降解;促进作用

SU Lei, WU Xuehua, LIU Xiuru, CHEN Liying, CHEN Keyu, HONG Shiming. An Investigation on Polypropylene Degradation in Supercritical Water Adding Benzoyl Peroxide[J]. .

苏磊,吴学华,刘秀茹,陈丽英,陈克宇,洪时明. 超临界水中添加过氧化苯甲酰对聚丙烯降解的促进作用[J]. CIESC Journal.