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《Acta Polymerica Sinica》 2014-11
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Synthesis of Polyoxazolidines and Their Application in Polyurethane Modification

Hong Chen;Chun-bin Tan;Jun Gao;Jing-xin Lei;Chemical Engineering Institute,Sichuan University;The State Key Laboratory of Polymer Materials Engineering,Polymer Research,Sichuan University;  
2,2-Dimethyl-N-hydroxyethyl-1,3-oxazolidine( OX) and two kinds of poly-oxazolidines based on OX: malonic acid diethyl-2,2-dimethyl-N-hydroxyethyl-1,3-oxazolidine ester( OX1) and 1,1,5,5-pentane end tetracarboxylic acid tetra-2,2-dimethyl-N-hydroxyethyl-1,3-oxazolidine ester( OX2) have been designed and successfully synthesized. Their structures have been confirmed by13C-NMR,ESI-MS,elemental analysis and FTIR. Their applications as latent curing agents in single component polyurethane( SPU) systems have been investigated. The results show that the SPU system cured in air without oxazolidine forms lots of foaming and can be swelled,its tensile strength is 3. 2 MPa and the elongation at break is 364%. However,the tensile strength and elongation at break of the SPU system cured with the synthesized OX2 can reach 27. 2 MPa and457%,about 9 times and 1. 26 times as compared with those the cured SPU system without OX,respectively.The addition of the synthesized OX1 or OX2can greatly improve the apparent performance,mechanical properties and thermal stability properties of the cured SPU system.
【Fund】: 山东省自主创新成果转化重大专项(项目号2012ZHX1A0206)资助项目
【CateGory Index】: TQ25;TQ316.6
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