Synthesis and Properties of Hyperbranched Polyurethane with a Long Chain Between the Branching Points

被引：9
|
作者：
Zeng, Shao-Min [1 ,2 ]
Chen, Ai-Fang [2 ]
Yao, Chang [2 ]
Liu, Dan [2 ]
Yi, Chang-Feng [1 ,2 ]
Xu, Zu-Shun [1 ,2 ]
机构：
[1] Hubei Univ, Minist Educ, Key Lab Synth & Applicat Organ Funct Mol, Wuhan 430062, Peoples R China
[2] Hubei Univ, Coll Mat Sci & Engn, Wuhan 430062, Peoples R China
来源：
DESIGNED MONOMERS AND POLYMERS | 2009年 / 12卷 / 03期
关键词：
Hyperbranched polyurethane; synthesis; thermal properties; mechanical properties; MOLECULAR ARCHITECTURE; POLYMERS; POLYMERIZATION; DENDRIMERS; MONOMERS; POLYESTERS;
D O I：
10.1163/156855509X436049
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 polyurethane (HPU) with a long chain between the branching points was synthesized from isocyanate end-capped polycarbonatediols and diethanolamine via an oligomeric A(2) + CB2 approach. The effects of the temperature and molar ratio of nPCDL/nNCO on the degree of branching (DB) were studied. The structure of the products was characterized by C-13-NMR. The results showed that the polymers had a hyperbranched structure and the DB value was 0.75 when the nPCDL/nTDI was 0.5 at 55 degrees C. The thermal and adhesive properties were investigated by thermogravimetric analysis and tensile test, respectively. The HPUs could be used as hot melt adhesive, and the maximum lap shear strength was up to 6.5 MPa. Moreover, the effects of the length of the chain, reaction temperature and reaction time on the adhesive ability were investigated. (C) Koninklijke Brill NV, Leiden, 2009
引用
收藏
页码：221 / 231
页数：11
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