Synthesis and characterization of segmented poly(butylene succinate) urethane ionenes containing secondary amine cation
Synthesis and characterization of segmented poly(butylene succinate) urethane ionenes containing secondary amine cation
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含仲胺阳离子嵌段聚丁二酸丁二醇酯聚氨酯紫罗烯的合成与表征
DOI：
10.1016/j.polymer.2014.05.059
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发表时间：
2014-08-05
期刊：
影响因子：
4.6
通讯作者：
Wang, Yu-Zhong
中科院分区：
文献类型：
--
作者：
Wu, Fang;Huang, Cai-Li;Wang, Yu-Zhong
在六亚甲基二异氰酸酯存在下，端二羟基聚丁二酸丁二醇胺盐酸盐(DEAH)与聚丁二酸丁二醇酯(DEAH)发生扩链反应，合成了含仲胺阳离子的嵌段聚丁二酸丁二醇酯(PBSUI)。用核磁共振、DSC、WAXD、POM、SAXS、DMA和旋转流变仪对PBSUI的结构和性能进行了表征，并对PBSUI的拉伸性能和降解性能进行了研究。所有结果表明，氨基甲酸酯离子基团的含量对PBSuls的性能起着重要的调节作用。随着氨酯离子基团含量的增加，结晶速率先增大后减小，平衡熔融温度逐渐升高。当DEAH含量为3wt%时，PBSUI的结晶速率最大。DMA和SAXS分析表明，在含5 wt%DEAH的PBSUI中，氨酯离子基团聚集形成了明显的团簇。由于离子基团聚集产生的物理交联效应，复合粘度随氨酯离子基团含量的增加而显著增加。当DEAH含量增加到3wt%时，材料的储能系数随Deah含量的增加而增加，但随着Deah含量的进一步增加而降低。拉伸测试表明，氨酯离子基团的加入对拉伸性能没有明显的影响。样品的水解率随氨酯离子基团含量的增加而增加，这主要归因于样品的亲水性增加。(C)2014爱思唯尔有限公司。保留所有权利。
The segmented poly(butylene succinate) urethane ionenes (PBSUI) containing secondary amine cation were synthesized by chain extension reaction of dihydroxyl terminated poly(butylene succinate) and diethanolamine hydrochloride (DEAH) in the presence of hexamethylene diisocyanate. NMR, DSC, WAXD, POM, SAXS, DMA, and rotational rheometer were used to characterize the structure and properties of the PBSUI, and the tensile properties and hydrolytic degradation of the PBSUI were also investigated. All the results suggest that the content of urethane ionic group plays an important role in tuning the properties of the PBSUls. The crystallization rate increased first and then decreased and the equilibrium melting temperature increased gradually with increasing urethane ionic group content. The maximum crystallization rate was obtained for PBSUI with 3 wt% DEAH. The obvious clusters formed by aggregation of urethane ionic group were evidenced by DMA and SAXS for the PBSUI containing 5 wt% DEAH. The complex viscosity increased significantly with increasing urethane ionic group content due to the physical crosslinking effect resulted from aggregation of ionic groups. The storage modulus increased with DEAH content increased up to 3 wt %, while decreased with further increasing DEAH content. Tensile testing indicated incorporation of urethane ionic group did not change the tensile properties apparently. The hydrolytic degradation rate of the samples increased with the increase in urethane ionic group content which was mainly ascribed to the increased hydrophilicity. (C) 2014 Elsevier Ltd. All rights reserved.