首页> 美国卫生研究院文献>Polymers >Bimetallic Catalytic Systems Based on Sb Ge and Ti for the Synthesis of Poly(ethylene terephthalate-co-isosorbide terephthalate)
【2h】

Bimetallic Catalytic Systems Based on Sb Ge and Ti for the Synthesis of Poly(ethylene terephthalate-co-isosorbide terephthalate)

机译:基于SbGe和Ti的双金属催化体系用于合成聚对苯二甲酸乙二醇酯-共-异山梨醇对苯二甲酸酯

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The insertion of rigid monomers such as isosorbide into poly(ethylene terephthalate) (PET) allows for the access of polymers with improved properties, notably in terms of thermal stability. This biobased monomer is however poorly reactive, and harsh reaction conditions lead to color concerns regarding the resulting polymer. This has motivated the development of catalytic systems enabling an increase of the reaction rate and a good coloration. In this study, we have assessed bimetallic catalytic systems based on the main metals used for PET catalysis, i.e., antimony, germanium and titanium, for the synthesis of poly(ethylene terephthalate-co-isosorbide terephthalate) (PEIT). The Sb2O3/Ti(OiPr)4 combination leads to a high reaction rate while maintaining an acceptable coloration. On the other hand, combining Sb2O3 with GeO2 affords the formation of poly(ethylene terephthalate-co-isosorbide terephthalate) without coloration concerns and a reaction rate higher than that observed using the single metal catalysts. Molecular weights and microstructure including diethyleneglycol (DEG) and isosorbide contents are also discussed, together with the thermal properties of the resulting PEIT. The GeO2/Ti(OiPr)4 is also assessed, and leads to average performances.
机译:硬质单体(例如异山梨醇)插入聚对苯二甲酸乙二醇酯(PET)中,可以获得具有改善的性能的聚合物,特别是在热稳定性方面。然而,这种生物基单体反应性差,苛刻的反应条件导致关于所得聚合物的颜色问题。这激励了催化系统的发展,该催化系统能够提高反应速率和良好的着色。在这项研究中,我们评估了基于PET催化的主要金属(锑,锗和钛)的双金属催化体系,用于合成聚对苯二甲酸乙二酯-共-异山梨醇对苯二甲酸酯(PEIT)。 Sb2O3 / Ti(OiPr)4组合可导致高反应速率,同时保持可接受的着色。另一方面,将Sb 2 O 3与GeO 2结合提供了聚对苯二甲酸乙二醇酯-共-异山梨醇对苯二甲酸酯的形成,而没有着色问题,并且反应速率高于使用单一金属催化剂观察到的速率。还讨论了分子量和微观结构,包括二甘醇(DEG)和异山梨醇的含量,以及所得PEIT的热性能。还评估了GeO2 / Ti(OiPr)4,并得出平均性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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