Microcellular morphology evolution of polystyrene/thermoplastic polyurethane blends in the presence of supercritical CO2

IF 1.3 4区 医学 Q4 MATERIALS SCIENCE, BIOMATERIALS
Z. Qu, Jianguo Mi, Yang Jiao, Hongfu Zhou, Xiangdong Wang
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引用次数: 9

Abstract

In this article, a facile melt blending and solid batch foaming approach was proposed to prepare microcellular polystyrene/thermoplastic polyurethane (PS/TPU) blending foams with supercritical carbon dioxide (CO2). Compared with those of pure PS and pure TPU, an interesting phenomenon about the enhanced complex viscosity and storage modulus, as well as decreased loss factor of PS/TPU blends, was found. The solubility of CO2 in the PS/TPU blends was enhanced, owing to the CO2 solubilization effects of TPU. An interesting bimodal cell structure (BCS) was observed in the PS/TPU blending foams with the TPU content of 10, 15, and 20%. Consequently, a significant conclusion could be speculated that the generation of BCS in the PS/TPU blending system depended on not only the viscosity and morphology of the polymer blends but also the solubility and diffusivity of the CO2 as well as the type of cell nucleation. The thermal insulation property of PS foam was improved by the introduction of TPU.
超临界CO2存在下聚苯乙烯/热塑性聚氨酯共混物的微孔形态演变
本文提出了一种简单的熔融共混和固体分批发泡方法,以制备超临界二氧化碳(CO2)与微孔聚苯乙烯/热塑性聚氨酯(PS/TPU)共混的泡沫。与纯PS和纯TPU相比,PS/TPU共混物的复合粘度和储能模量提高,损耗因子降低,这是一个有趣的现象。由于TPU的CO2增溶作用,提高了CO2在PS/TPU共混物中的溶解度。在TPU含量为10%、15%和20%的PS/TPU共混泡沫中观察到有趣的双峰胞结构(BCS)。因此,可以推测出一个重要的结论,即PS/TPU共混体系中BCS的产生不仅取决于聚合物共混物的粘度和形态,还取决于CO2的溶解度和扩散率以及细胞成核的类型。TPU的引入改善了PS泡沫的隔热性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Cellular Polymers
Cellular Polymers 工程技术-材料科学:生物材料
CiteScore
3.10
自引率
0.00%
发文量
9
审稿时长
3 months
期刊介绍: Cellular Polymers is concerned primarily with the science of foamed materials, the technology and state of the art for processing and fabricating, the engineering techniques and principles of the machines used to produce them economically, and their applications in varied and wide ranging uses where they are making an increasingly valuable contribution. Potential problems for the industry are also covered, including fire performance of materials, CFC-replacement technology, recycling and environmental legislation. Reviews of technical and commercial advances in the manufacturing and application technologies are also included. Cellular Polymers covers these and other related topics and also pays particular attention to the ways in which the science and technology of cellular polymers is being developed throughout the world.
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