| MDI异构体对聚氨酯弹性体微观结构和性能的影响 |
| |
| 引用本文： | 李会,周青,杨万泰,刘海蓉,喻建明.MDI异构体对聚氨酯弹性体微观结构和性能的影响[J].聚氨酯工业,2010,25(3):22-25. |
| |
| 作者姓名： | 李会 周青 杨万泰 刘海蓉 喻建明 |
| |
| 作者单位： | 1. 北京化工大学材料科学与工程学院,100029
2. 烟台万华聚氨酯股份有限公司北京研究院,102200 |
| |
| 摘 要： | 以聚氧化丙烯二醇(DL-2000)为软段,不同2,4′-异构体含量的二苯基甲烷二异氰酸酯(MDI)和1,4-丁二醇(BDO)为硬段,采用预聚法合成了不同异构体含量的MDI型聚氨酯弹性体。采用FT-IR、DSC和DMA等分析手段对其结构和性能进行了表征。结果表明,随着2,4′-MDI异构体含量的增加,硬段间的氢键结合化程度降低,硬段区聚集结晶的能力也不断下降,硬段趋于均匀分散在连续相软段区中,两相相容性增加,聚氨酯弹性体的T和tanδ大幅度提高。
|
| 关 键 词： | MDI异构体 聚氨酯弹性体 微相分离 结构性能 |
The Effects of MDI Isomer on the Micro-Structure and Property of Polyurethane Elastomer |
| |
| Li Hui,Zhou Qing,Yang Wantai,Liu Hairong,Yu Jianming.The Effects of MDI Isomer on the Micro-Structure and Property of Polyurethane Elastomer[J].Polyurethane Industry,2010,25(3):22-25. |
| |
| Authors: | Li Hui Zhou Qing Yang Wantai Liu Hairong Yu Jianming |
| |
| Affiliation: | Li Hui Zhou Qing Yang Wantai Liu Hairong Yu Jianming (1. College of Material Science ＆ Engineering, Beijing University of Chemical Technology, 100029, China) (2. Beijing Research Institute of Yantai Wanhua Polyurethanes Co. Ltd, 102200, China) |
| |
| Abstract: | The different isomer content polyurethanes were synthesized from methylenebis （phenyl isoeyanate） （MDI） of different content of 2,4＇-MDI isomer and butanediol（BDO） as a hard segmont and low molecular weight polyether-diol（DL-2000） as a soft segment by pre-polymerization process . The structure and properties of these polyurethanes were investigated by FTIR, differential scanning calorimetry （DSC） and dynamic mechanical analysis （DMA） respectively. The experiment results indicated that the degree of hydrogen bonding and crystallinity within hard segment were decreased with increasing the content of 2,4＇-MDI isomer. This promoted the phase mixing between hard segments and soft segments and subsequently improved the Tg and tanδ of the PU dramatically. |
| |
| Keywords: | MDI isomer polyuerthane elastomer micro-phase separation structure property |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
