Facile and efficient synthesis of hyperbranched polyesters based on renewable castor oil

被引：21
作者：
Bao, Youmei [1 ,2 ]
He, Jing [3 ]
Li, Yuesheng [1 ,3 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[2] Chinese Acad Sci, Changchun Branch, Grad Sch, Changchun 130022, Peoples R China
[3] Yanshan Univ, Coll Environm & Chem Engn, Qinhuangdao 066004, Peoples R China
来源：
POLYMER INTERNATIONAL | 2013年 / 62卷 / 10期
基金：
中国国家自然科学基金;
关键词：
renewable resource; hyperbranched polymer; thiol-ene; PLANT OILS; POLYMERS; CHEMISTRY; RESOURCES; METATHESIS; CHEMICALS; BEHAVIOR;
D O I：
10.1002/pi.4440
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Hyperbranched polyesters with thioether linkages were facilely prepared from methyl 10-undecenoate, a castor oil-derived renewable chemical. The monomer was obtained in excellent yield through thiol-ene click chemistry in the presence of catalytic amounts of photoinitiator under UV irradiation. Subsequent bulk polycondensation via a transesterification process catalyzed by Ti(OBu) 4, Sb2O3 or Zn(OAc) 2 gave hyperbranched polyesters with high molecular weights and unusual crystalline properties. The degree of branching in the range 0.45-0.54 calculated from quantitative 13C NMR spectroscopy and low inherent viscosities of 0.16-0.25 dL g-1 strongly confirmed the hyperbranched structures of the resultant polymers. (C) 2012 Society of Chemical Industry
引用
收藏
页码：1457 / 1464
页数：8
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