• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Modified polyurethane with improvement of acid dye dyeability
【24h】

Modified polyurethane with improvement of acid dye dyeability

机译：具有改善酸性染料可染性的改性聚氨酯

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This article concerns the modification of polyurethane using polyamide 6,6 prepolymer to improve the dyeability properties of the polyurethane copolymer with acid dye. First, the carboxyl-terminated polyamide 6,6 prepolymer was synthesized from adipic acid and 1,6-diaminohexane. The isocyanate-terminated polyurethane prepolymer was also synthesized from polytetramethylene glycol and 4,4'-diphenylmethane diisocyanate in N,N-dimethylformamide. The polyurethane prepolymer was then extended with a mixture of 1,4-butanediol and the polyamide 6,6 prepolymer (molar ratios of 1,4-butanediol to prepolymer being 100%, 75%, 50%, and 25%, respectively). Finally, the poly(urethane-amide) copolymers were dyed with acid dyes. the chemical, physical, and the dyeing properties of the poly(urethane-amide) coploymers are discussed. From the experimental results, it is found that the inherent viscosity of poly (urethane-amide) coploymers is increased with the increasing amount of polyamide content. The structure is proven by infrared spectra, which exhibits the absorption peaks of urethane and amide groups as we expected. From the differential scanning calorimetry measurements, it is found that the poly(urethane-amide) coploymers have two-phase structures and good phase separation. There are four transition temperatures (T(g)s, T(g)h, T(m)s, and T(m)h), but only those copolymers in PTMG 2,000 series possess T(m)s. Moreover, the T(g)s is found to change with the length of soft segment, and the T(g)h is increased with the increasing amount of polyamide content. Also, the dyed copolymers exhibit higher T(g)h than those without dyeing of dye molecule, but the T(g)s is not obviously changed. For mechanical properties, it is indicated that both the modulus and the strength of the coploymers are higher than those of unmodified polyurethane, but they are lowered after being dyed with dye molecule due to further separation of intermolecular distance of the dyed polyurethanes. For dye uptake in dyeing properties, it is found to increase with increasing amount of polyamide content. For dye fastness, the dyed copolymers exhibit higher grade of water fastness than that of unmodified polyurethane. (C) 2003 Wiley Periodicals, Inc. [References: 13]
机译：本文涉及使用聚酰胺6,6预聚物对聚氨酯进行改性以改善聚氨酯共聚物与酸性染料的可染性。首先，由己二酸和1,6-二氨基己烷合成羧基封端的聚酰胺6,6预聚物。异氰酸酯封端的聚氨酯预聚物也由聚丁二醇和N，N-二甲基甲酰胺中的4,4'-二苯甲烷二异氰酸酯合成。然后，将聚氨酯预聚物与1，4-丁二醇和聚酰胺6，6预聚物的混合物进行扩容（1，4-丁二醇与预聚物的摩尔比分别为100％，75％，50％和25％）。最后，将聚（氨基甲酸酯-酰胺）共聚物用酸性染料染色。讨论了聚（氨基甲酸酯-酰胺）共聚物的化学，物理和染色性能。从实验结果发现，聚（氨基甲酸酯-酰胺）共聚物的特性粘度随着聚酰胺含量的增加而增加。该结构已通过红外光谱证明，该光谱显示了我们预期的氨基甲酸酯和酰胺基团的吸收峰。从差示扫描量热法测量，发现聚（氨基甲酸酯-酰胺）共聚单体具有两相结构和良好的相分离。有四个转变温度（T（g）s，T（g）h，T（m）s和T（m）h），但是只有PTMG 2,000系列的那些共聚物才具有T（m）s。此外，发现T（g）s随着软链段的长度而变化，并且T（g）h随着聚酰胺含量的增加而增加。而且，染色的共聚物显示出比未染色分子高的T（g）h，但是T（g）s没有明显变化。对于机械性能，表明共聚单体的模量和强度均高于未改性的聚氨酯，但是由于进一步分离了被染色的聚氨酯的分子间距离，它们在被染料分子染色后降低。为了吸收染料的染色性能，发现其随聚酰胺含量的增加而增加。对于染料坚牢度，染色的共聚物显示出比未改性聚氨酯更高的水坚牢度。 （C）2003 Wiley Periodicals，Inc. [参考：13]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号