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首页> 外文期刊>Journal of Applied Polymer Science >TOUGHENED POLY(BUTYLENE TEREPHTHALATE)S AND BLENDS PREPARED BY SIMULTANEOUS CHAIN EXTENSION, INTERFACIAL COUPLING, AND DYNAMIC VULCANIZATION USING OXAZOLINE INTERMEDIATES
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TOUGHENED POLY(BUTYLENE TEREPHTHALATE)S AND BLENDS PREPARED BY SIMULTANEOUS CHAIN EXTENSION, INTERFACIAL COUPLING, AND DYNAMIC VULCANIZATION USING OXAZOLINE INTERMEDIATES

机译：通过链扩展，界面偶联和恶唑啉中间体的动态硫化来制备增韧聚对苯二甲酸丁二醇酯和共混物

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Toughness of poly (butylene terephthalate) (PET) was improved by reactive blending of PET with 2-substituted 1,3-oxazoline intermediates such as low-molecular-weight bisoxazolines, and oxazoline-functionalized nitrile rubbers derived from both nitrile liquid rubber (Nipol(R)) and high-molecular-weight hydrogenated nitrile rubber (Therban(R)). Conversion of 7 mol % of the nitrile groups of Nipol into 1,3-oxazoline, corresponding to less than 1 oxazoline group per chain, was sufficient to afford melt strengthening and substantially improved dispersion and interfacial adhesion of the nitrile rubber microphases in the PBT continuous phase. Also in the case of high molecular weight Therban, oxazoline functionalization significantly improved compatibility with PBT. Best results in terms of toughness/stiffness balance, with impact strength exceeding 200 kJ/m(2), was achieved when PBT was blended with both oxazoline-functionalized high-molecular-weight hydrogenated nitrile rubber and low-molecular-weight bisoxazoline chain extenders. The outstanding performance of such PBT blends, containing 10 and 20 wt % oxazoline-modified Therban and 0.6-1.1 wt % bisoxaoline chain extender, respectively, was attributed to simultaneous bisoxazoline-mediated PBT chain extension, interfacial coupling and dynamic vulcanization of the oxazoline-functionalized nitrile rubber. (C) 1997 John Wiley & Sons, Inc. [References: 22]
机译：通过将PET与2-取代的1,3-恶唑啉中间体（例如低分子量双恶唑啉和由两种腈液体橡胶（Nipol衍生）的恶唑啉官能化的丁腈橡胶）反应共混，可改善聚对苯二甲酸丁二酯（PET）的韧性（R））和高分子量氢化丁腈橡胶（Therban®）。将7 mol％的Nipol腈基转化为1,3-恶唑啉，相当于每条链上少于1个恶唑啉基，足以提供熔体增强作用，并显着改善了PBT连续物中丁腈橡胶微相的分散性和界面粘合力相。同样在高分子量Therban的情况下，恶唑啉官能化显着改善了与PBT的相容性。当将PBT与恶唑啉官能化的高分子量氢化丁腈橡胶和低分子量双恶唑啉扩链剂共混时，在韧性/刚度平衡方面具有最佳结果，冲击强度超过200 kJ / m（2）。 。分别包含10和20 wt％的恶唑啉改性的Therban和0.6-1.1 wt％的双恶唑啉扩链剂的此类PBT共混物的出色性能归因于双恶唑啉介导的PBT扩链，界面偶联以及恶唑啉-的动态硫化功能化丁腈橡胶。 （C）1997 John Wiley＆Sons，Inc. [参考：22]

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