Calix[4]arenes Used as a New Type of Chain Extender in the Preparation of Polyurethanes

Qin Zheng; Shuling Gong; Haiqing Dong; Yuanyin Chen

doi:10.1071/CH06387

RESEARCH ARTICLE

Previous Next Contents Vol 60(3)

Calix[4]arenes Used as a New Type of Chain Extender in the Preparation of Polyurethanes

Qin Zheng ^A , Shuling Gong ^A ^B , Haiqing Dong ^A and Yuanyin Chen ^A

+ Author Affiliations

- Author Affiliations

^A College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.

^B Corresponding author. Email: gongsl@chem.whu.edu.cn

Australian Journal of Chemistry 60(3) 167-172 https://doi.org/10.1071/CH06387
Submitted: 20 October 2006 Accepted: 12 January 2007 Published: 2 April 2007

Abstract

A series of polyether– or polyester–polyurethanes based on tetrahydrofuran–propylene oxide copolyether diol (PTMG/PPG) or poly(ethylene terephthalate) diol (PET), toluene diisocyanate (TDI), and three kinds of chain extenders including two calix[4]arene derivatives and 3,3´-dichloro-4,4´-diaminodiphenylmethane (MOCA) were synthesized in toluene. The thermal stability and mechanical properties of solvent-type polyurethanes were investigated. Incorporation of calixarenes into polyurethane backbones improved the thermal properties of the polyurethane as a result of the residual phenol hydroxy groups of the calix[4]arene units. Compared with polyurethane chain-extended by MOCA, the polyurethanes with calix[4]arene derivatives had higher elongation at break, lower elastic modulus, and lower yield strength, as a result of the larger steric cubage of calix[4]arene units and relatively large free volume of the polymer.

References

Calix[4]arenes Used as a New Type of Chain Extender in the Preparation of Polyurethanes

Abstract

Subscriber Login