Synthesis and Properties of HTPB/PTHF Polyurethane Elastomers |
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DOI: |
Key Words: hydroxy-terminated polybutadiene;polytetrahydrofuran;polyurethane elastomer;N;N-di(2-hydroxy propyl)aniline |
Author Name | Affiliation | Hao Lixin | Qingdao Institute of Chemical Technology | Tian Yongliang | Qingdao Institute of Chemical Technology | Wu Yanming | Qingdao Institute of Chemical Technology | Xin Haobo | Qingdao Institute of Chemical Technology | Li Dehe | Qingdao Institute of Chemical Technology |
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Abstract: |
The formula of hydroxy-terminated polybutadiene(HTPB)/polytetrahy-drofuran(PTHF)polyurethane elastomers was studied.The influence of the free ——NCO content,the chain extend coefficient with N,N-di(2-hydroxy propyl) aniline chain extender,and the ratio of HTPB/PTHF on the physical properties of elastomers was investigated.The test results showed that the good balanced properties of elastomers were obtained when the free ——NCO content was 8.5% and the chain extend coefficient was 0.89;the improved tensile strength and tear strength of elastomers were obtained as the ratio of HTPB/PTHF decreased.It was showed by electron microscope that the remarkable soft blocks and hard blocks existed in the elastomers. |
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