基于5-甲基-5-烯丙氧基羰基-1,3-二恶烷-2-酮的新型脂族聚碳酸酯,Journal of Polymer Science Part A: Polymer Chemistry

当前位置： X-MOL 学术 › J. Polym. Sci. A Polym. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

基于5-甲基-5-烯丙氧基羰基-1,3-二恶烷-2-酮的新型脂族聚碳酸酯
Journal of Polymer Science Part A: Polymer Chemistry Pub Date : 16 May 2003 , DOI: 10.1002/pola.10724
Brian D. Mullen , Chau N. Tang , Robson F. Storey

首次进行了含有烯丙基酯部分的新的环状碳酸酯单体（5-甲基-5-烯丙氧基羰基-1,3-二恶烷-2-酮（MAC））的合成，表征和开环聚合。从原料2,2-双（羟甲基）丙酸开始，MAC以五步合成，高收率。尝试了新的环状碳酸酯与外消旋-丙交酯（外消旋-LA）和对-己内酯（CL）的聚合和共聚。Rac -LA与MAC很好地共聚，但CL共聚产生不溶的产物。MAC和rac的低聚宏观引发剂-LA由乙醇亚锡合成，并且两种大分子引发剂均用于rac -LA的受控开环聚合。聚合动力学通过监测特性C的消失检查 [键]

在1240厘米单体的O形环的拉伸^-1具有实时原位傅立叶变换红外光谱。进行后聚合氧化反应以环氧化MAC官能化聚合物的不饱和键。含环氧化物的聚合物可以允许用各种亲核试剂，例如胺，醇和羧酸进行进一步的有机转化。NMR用于鉴定聚合物的微观结构，尺寸排阻色谱和差示扫描量热法用于表征新型官能化的聚（碳酸酯）。©2003 Wiley Periodicals，Inc. J Polym Sci A部分：Polym Chem 41：1978–1991，2003

"点击查看英文标题和摘要"

New aliphatic poly(ester-carbonates) based on 5-methyl-5-allyloxycarbonyl-1,3-dioxan-2-one

The synthesis, characterization, and ring-opening polymerization of a new cyclic carbonate monomer containing an allyl ester moiety, 5-methyl-5-allyloxycarbonyl-1,3-dioxan-2-one (MAC), was performed for the first time. MAC was synthesized in five steps in good yield beginning from the starting material, 2,2-bis(hydroxymethyl)propionic acid. Subsequent polymerization and copolymerizations of the new cyclic carbonate with rac-lactide (rac-LA) and ϵ-caprolactone (CL) were attempted. Rac-LA copolymerized well with MAC, but CL copolymerizations produced insoluble products. Oligomeric macroinitiators of MAC and rac-LA were synthesized from stannous ethoxide, and both macroinitiators were used for the controlled ring-opening polymerization of rac-LA. The polymerization kinetics were examined by monitoring the disappearance of the characteristic C [BOND]

O ring stretch of the monomer at 1240 cm⁻¹ with real-time in situ Fourier transform infrared spectroscopy. Postpolymerization oxidation reactions were conducted to epoxidize the unsaturated bonds of the MAC-functionalized polymers. Epoxide-containing polymers may allow further organic transformations with various nucleophiles, such as amines, alcohols, and carboxylic acids. NMR was used for microstructure identification of the polymers, and size exclusion chromatography and differential scanning calorimetry were used to characterize the new functionalized poly(ester-carbonates). © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 1978–1991, 2003

更新日期：2017-01-31

点击分享查看原文

点击收藏

阅读更多本刊新发论文