| RING-OPENING POLYMERIZATION OF 1,4-DIOXAN-2-ONE INITIATED BY LANTHANUM TRIS（ 2,6-DI-TERT-BUTYL-4-METHYLPHENOLATE） |
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| 引用本文： | Qing Fang Hao Zheng Guo-rong Shen Zhi-quan Shen. RING-OPENING POLYMERIZATION OF 1,4-DIOXAN-2-ONE INITIATED BY LANTHANUM TRIS（ 2,6-DI-TERT-BUTYL-4-METHYLPHENOLATE）[J]. 高分子科学, 2007, 0(4): 427-430 |
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| 作者姓名： | Qing Fang Hao Zheng Guo-rong Shen Zhi-quan Shen |
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| 作者单位： | [1]Department of Chemisthey, Zhejiang University, Hangzhou 310027, China [2]Institute of Polymer Science, Zhejiang University, Hangzhou 310027, China |
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| 基金项目： | This work was financially supported by the financial support of National Natural Science Foundation of China （No. 20434020）. |
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| 摘 要： | The ring-opening polymerization of 1,4-dioxan-2-one （PDO） was carried out by lanthanum tris（2,6-di-tert-butyl-4- methylphenolate） （La（OAr）3） as novel single component initiaLor. The influences of polymerization reaction temperature and the molar ratio of monomer to initiator on the monomer conversion and molecular weight of poly（1,4-dioxan-2-one） （PPDO） were explored. PPDO with high viscosity average molecular weight of 1.95×10^5 can be prepared at 40℃ when [PDO]/ [La（OAr）3] molar ratio was 800. Mechanism investigation shows that the polymerization proceeds through a ＂coordination- insertion＂ mechanism with selective rupture of acyl-oxygen be,nd of PDO.
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| 关 键 词： | 开环聚合 1 4-二恶烷 镧 三（2 6-二-三元醇-丁基-4-甲基酚盐） |
| 收稿时间： | 2007-01-29 |
| 修稿时间： | 2007-03-23 |
RING-OPENING POLYMERIZATION OF 1,4-DIOXAN-2-ONE INITIATED BY LANTHANUM TRIS(2,6-DI-TERT-BUTYL-4-METHYLPHENOLATE) |
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| Qing Fang,Hao Zheng,Guo-rong Shen,Zhi-quan Shen. RING-OPENING POLYMERIZATION OF 1,4-DIOXAN-2-ONE INITIATED BY LANTHANUM TRIS(2,6-DI-TERT-BUTYL-4-METHYLPHENOLATE)[J]. Chinese Journal of Polymer Science, 2007, 0(4): 427-430 |
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| Authors: | Qing Fang Hao Zheng Guo-rong Shen Zhi-quan Shen |
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| Affiliation: | Department of Chemisthey Institute of Polymer Science, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The ring-opening polymerization of 1,4-dioxan-2-one (PDO) was carried out by lanthanum tris(2,6-di-tert-butyl-4-methylphenolate) (La(OAr)3) as novel single component initiator. The influences of polymerization reaction temperature and the molar ratio of monomer to initiator on the monomer conversion and molecular weight of poly(1,4-dioxan-2-one) (PPDO) were explored. PPDO with high viscosity average molecular weight of 1.95 × 105 can be prepared at 40oC when [PDO]/ [La(OAr)3] molar ratio was 800. Mechanism investigation shows that the polymerization proceeds through a “coordination-insertion” mechanism with selective rupture of acyl-oxygen bond of PDO. |
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| Keywords: | Lanthanum tris(2 6-di-tert-butyl-4-methylphenolate) 4-dioxan-2-one Ring-opening polymerization |
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