Controlled Ring-Opening Polymerization of L-Lactide and ε-Caprolactone Catalyzed by Aluminum-Based Lewis Pairs or Lewis Acid Alone

被引：20

作者：

Nakayama, Yuushou ^{[1
]}

Kosaka, Shunsuke ^{[1
]}

Yamaguchi, Kentaro ^{[1
]}

Yamazaki, Gentaro ^{[1
]}

Tanaka, Ryo ^{[1
]}

Shiono, Takeshi ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2017年 / 55卷 / 02期

关键词：

Lewis pair; Lewis acid; catalysts; polyesters; ring-opening polymerization; CYCLIC ESTERS; VERSATILE INITIATORS; TIN(II) OCTOATE; MECHANISM; COMPLEXES; POLYMERS; KINETICS; CYTOTOXICITY; ISOPROPOXIDE; POLYLACTONES;

D O I：

10.1002/pola.28383

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Ring-opening polymerization of cyclic esters was studied using catalysts composed of bulky Lewis acids (LA) and Lewis bases (LB). Controlled polymerization of L-lactide (L-Lac) was proceeded by Al(C6F5)(3). THF in combination with trimesitylphosphine (Mes(3)P) or triphenylphosphine (Ph3P) using BnOH as an initiator to produce poly(L-Lac) with narrow molecular weight distribution (MWD; M-w/M-n=1.1). Both the LA and the LB were indispensable to promote the polymerization. The molecular weights of the resulting poly(L-Lac) s were controlled by the feed monomer to initiator ratio. e-Caprolactone (CL) was rapidly polymerized by Al(C6F5)(3). THF with or without Mes(3)P, although the resulting polymer had rather broad MWD (M-w/M-n = 1.7). The CL polymerization by Al(C6F5)(3). THF alone at r.t. gave poly(CL) with relatively narrow MWD (M-w/M-n=1.2). (C) 2016 Wiley Periodicals, Inc.

引用

页码：297 / 303

页数：7

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