A study on biodegradable aliphatic poly(tetramethylene succinate): the catalyst dependences of polyester syntheses and their thermal stabilities
文献类型：期刊论文
| 作者 | Yang, J; Zhang, SP; Liu, XY; Cao, AM |
| 刊名 | POLYMER DEGRADATION AND STABILITY
 |
| 出版日期 | 2003-07-01 |
| 卷号 | 81期号:1页码:1-7 |
| 关键词 | Biodegradable Aliphatic Ptms Ttipo Catalyst Condensation Polymerisation Thermal Stability |
| ISSN号 | 0141-3910 |
| DOI | 10.1016/S0141-3910(03)00056-9 |
| 英文摘要 | In this study, titanium alkoxide catalyst dependences of condensation polymerization, thermal degradation and stability were examined for a biodegradable aliphatic poly(tetramethylene succinate) (PTMS). A series of aliphatic PTMSs were synthesized through polycondensation of 1,4-butanediol and succinic acid in bulk with various amounts of titanium tetraisopropoxide (TTiPO) as the catalyst, and were further characterized by gel permeation chromatography, differential scanning calorimetry and thermo-gravimetric analysis. To reveal the presence and effect of catalyst residues, the crude product PTMS samples were precipitated in methanol from their chloroform solution, and were further refluxed in an acid solution to selectively hydrolyse the weak metal alkoxide moieties formed. Results of GPC analysis indicated that the original precipitated polyesters exhibited remarkably increasing molecular weights with a decrease in the catalyst/succinic acid feed molar ratio, and strong catalyst dependence of molecular weight and distribution were detected for the product polyesters. As for the acid deactivated samples, it was found that the higher the catalyst concentration used for polyester synthesis, the more remarkable was the decrease in molecular weight observed as compared with the corresponding original precipitated polyesters. Hence, a weak chain linker structure, such as (RO)(n)Ti(OP)(m) with m > I was reasonably suggested to be included in the macromolecular architecture of polyester, where RO and P respectively express the alkoxyl moiety and polyester chain. Thermal analysis showed similar melting points and glass transition temperatures for all polyester samples. In contrast, a strong catalyst dependence of thermal degradation and stability was found for the TTiPO catalysed polyesters, and can be interpreted for the formed weak (RO)(n)Ti(OP)(m) structures. (C) 2003 Elsevier Science Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000183134300001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/80241]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Cao, AM |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Organ Chem, Polymer Mat Lab, Shanghai 200032, Peoples R China 2.NW Univ Xian, Dept Chem, Xian 710069, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, J,Zhang, SP,Liu, XY,et al. A study on biodegradable aliphatic poly(tetramethylene succinate): the catalyst dependences of polyester syntheses and their thermal stabilities[J]. POLYMER DEGRADATION AND STABILITY,2003,81(1):1-7. |
| APA | Yang, J,Zhang, SP,Liu, XY,&Cao, AM.(2003).A study on biodegradable aliphatic poly(tetramethylene succinate): the catalyst dependences of polyester syntheses and their thermal stabilities.POLYMER DEGRADATION AND STABILITY,81(1),1-7. |
| MLA | Yang, J,et al."A study on biodegradable aliphatic poly(tetramethylene succinate): the catalyst dependences of polyester syntheses and their thermal stabilities".POLYMER DEGRADATION AND STABILITY 81.1(2003):1-7. |
入库方式： OAI收割
来源：化学研究所
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