| Mechanical properties of low modulus polyester urethane elastomer |
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| DOI： |
| Key Words: PU elastomer；polyester；toluene diisocyanate；mechanical properties |
| Author Name | Affiliation | | LIU Liang-bing | Shanxi Provincial Research Institute of Chemical Technology | | PANG Kun-wei | Shanxi Provincial Research Institute of Chemical Technology | | LI Fen | Shanxi Provincial Research Institute of Chemical Technology | | HAN Xue-gang | Shanxi Provincial Research Institute of Chemical Technology | | LIU Hong-mei | Shanxi Provincial Research Institute of Chemical Technology |
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| Abstract: |
| A cast PU elastomer was prepared with polyester glycol，toluene diisocyanate (TDI)and chain extender.The influence of prepolymerization and one-step polymerization，80/20 TDI and 2，4-TDI，type and molecular weight of polyester glycol，molecular weight between crosslinking si tes and molecular weight of rigid segment on the mechanical properties of PU elastomer was investigated.The results showed that the PU elastomer made of ployester and 80/20 TDI by prepolymerization had the better comprehensive properties.Among three polyester PU elastomers，the PU elastomer made of PBA had the best comprehensive properties.The PU elastomer had the greatest strength when the molecular weight betw een crosslinking sites was 4 500. |
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