Random copolymerization of epsilon-caprolactone and trimethylene carbonate with rare earth catalysts
文献类型：期刊论文
| 作者 | Shen, YQ; Shen, ZQ; Zhang, YF; Huang, QH; Shen, LF; Yuan, HZ |
| 刊名 | JOURNAL OF APPLIED POLYMER SCIENCE
 |
| 出版日期 | 1997-06-13 |
| 卷号 | 64期号:11页码:2131-2139 |
| 关键词 | random copolymerization epsilon-caprolactone and trimethylene carbonate rare earth catalysts |
| ISSN号 | 0021-8995 |
| 英文摘要 | Random copolymerization of trimethylene carbonate (TMC) with epsilon-caprolactone (CL) catalyzed by rare earth chloride-epoxide or rare earth isopropoxide has been investigated for the first time. It was found that in the presence of epoxide, rare earth chlorides have high activities for the copolymerization, giving high-molecular-weight random copolymer P(CL-co-TMC) with a narrow molecular weight distribution. Light rare earth chloride-propylene oxide systems are more effective for the copolymerization than heavy rare earth chloride-propylene oxide systems. For the rare earth chloride-epoxide catalyst system, epoxide is the requisite component, and its amount affects the catalytic activity; while rare earth isopropoxide can catalyze the copolymerization alone. The preparative conditions of the copolymer with NdCl3-5PO system were studied. The reactivity ratios of CL and TMC copolymerization with NdCl3-5PO determined by Fineman-Ross method are 1.60 for r(TMC) and 0.72 for r(CL), respectively. The copolymers were characterized by H-1- and C-13-NMR, GPC, and DSC. The mechanism study shows that the rare earth alkoxide is the active species that initiates the ring opening copolymerization of CL and TMC with acyl-oxygen bond cleavages of the monomers. (C) 1997 John Wiley & Sons, Inc. |
| WOS研究方向 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:A1997WZ77900009 |
| 出版者 | JOHN WILEY & SONS INC |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/4128]  |
| 专题 | 中国科学院武汉植物园 |
| 作者单位 | 1.ZHEJIANG UNIV,DEPT POLYMER SCI & ENGN,HANGZHOU 310027,PEOPLES R CHINA 2.CHINESE ACAD SCI,WUHAN INST PHYS,STATE KEY LAB MAGNET RESONANCE & ATOM MOL PHYS,WUHAN,PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | Shen, YQ,Shen, ZQ,Zhang, YF,et al. Random copolymerization of epsilon-caprolactone and trimethylene carbonate with rare earth catalysts[J]. JOURNAL OF APPLIED POLYMER SCIENCE,1997,64(11):2131-2139. |
| APA | Shen, YQ,Shen, ZQ,Zhang, YF,Huang, QH,Shen, LF,&Yuan, HZ.(1997).Random copolymerization of epsilon-caprolactone and trimethylene carbonate with rare earth catalysts.JOURNAL OF APPLIED POLYMER SCIENCE,64(11),2131-2139. |
| MLA | Shen, YQ,et al."Random copolymerization of epsilon-caprolactone and trimethylene carbonate with rare earth catalysts".JOURNAL OF APPLIED POLYMER SCIENCE 64.11(1997):2131-2139. |
入库方式： OAI收割
来源：武汉植物园
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