In situ polymerization of biodegradable poly(butylene-co-succinate terephthlate) nanocomposites and their real-time tracking of microstructure
In situ polymerization of biodegradable poly(butylene-co-succinate terephthlate) nanocomposites and their real-time tracking of microstructure
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可生物降解聚对苯二甲酸丁二酯纳米复合材料的原位聚合及其微观结构的实时跟踪
DOI：
10.1016/j.compscitech.2015.06.007
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发表时间：
2015-09-29
影响因子：
9.1
通讯作者：
Li, Faxue
中科院分区：
文献类型：
--
作者：
Wei, Zhenzhen;Lin, Jinyou;Li, Faxue
可生物降解的聚对苯二甲酸丁二醇酯（PBST）在制备过程中结晶缓慢，在使用过程中形态不稳定，限制了其进一步的开发和应用。因此，采用纳米二氧化硅（NPs）作为多功能纳米填料，将显著促进PBST的发展，拓宽其应用范围。在这里，我们提出了一种简便的方法，通过原位聚合生成PBST/二氧化硅纳米复合材料。将二氧化硅纳米颗粒分散到聚合物基体中，赋予所得复合材料以改善的热性能、机械性能和在从熔体冷却期间的加速结晶，这已通过原位X射线测量证实。提出了PBST及其纳米复合材料在冷却过程中的结构发展。同时，研究了PEST纳米复合材料在单向拉伸过程中的晶体和层状结构演变。结晶形态的转变发生在拉伸过程中，但与原始共聚物相比有所延迟，并且层状结构的形成高度依赖于温度。研究PBST纳米复合材料对动态条件的结构响应有利于定制PBST产品的性能，也为PBST纳米复合材料与其他纳米填料的各种应用打开了大门。(C)2015爱思唯尔有限公司版权所有。
The further development and application of biodegradable poly(butylene-co-succinate terephthlate) (PBST) copolymer was restricted due to the slow crystallization during fabrication and the unstable morphologies during utilization. Prospectively, employing silica nanoparticles (NPs) as versatile nanofillers will notably promote the advances of PBST and broaden its scope of application. Here, we present a facile method for the generation of PBST/silica nanocomposites via in situ polymerization. Incorporating silica NPs into polymer matrices endows the resultant composites with improved thermal, mechanical properties and accelerated crystallization during cooling from the melts, which has been confirmed by the in situ X-ray measurements. The structural development of PBST and its nanocomposites during cooling is proposed. Meanwhile, the crystal and lamellae structural evolution of PEST nanocomposites during uniaxial stretching is also investigated. The transition of crystal forms occurs during stretching but is delayed compared with that of pristine copolymer, and the formation of lamellar structure is highly dependent on the temperature. Studies of structural responses of PBST nanocomposites to dynamic conditions are beneficial to tailor the properties of PBST products, and also open the door to PBST nanocomposites with other nanofillers for various applications. (C) 2015 Elsevier Ltd. All rights reserved.