Insight into the influence of OA-Fe3O4 nanoparticles on the morphology and scCO(2) batch-foaming behavior of cocontinuous LLDPE/PS immiscible blends at semi-solid state
Insight into the influence of OA-Fe3O4 nanoparticles on the morphology and scCO(2) batch-foaming behavior of cocontinuous LLDPE/PS immiscible blends at semi-solid state
复制标题
深入探讨 OA-Fe3O4 纳米粒子对半固态共连续 LLDPE/PS 不混溶共混物的形态和 scCO(2) 间歇发泡行为的影响
DOI：
10.1016/j.polymer.2017.09.053
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发表时间：
2017
期刊：
影响因子：
4.6
通讯作者：
Tang Tao
中科院分区：
文献类型：
--
作者：
Zhang Guangchun;Zhang Shaofeng;Qiu Jian;Jiang Zhiwei;Xing Haiping;Li Minggang;Tang Tao
The influence of oleic acid modified Fe3O4(OA-Fe3O4) nanoparticles on the morphology and foaming behavior of cocontinuous linear low density polyethylene/polystyrene (LLDPE/PS) immiscible blends (60/40 by weight) was studied. The morphology observation showed that the addition of nanofillers resulted in the increased dispersion degree of both LLDPE and PS components and even the transformation of phase structure from cocontinuous structure to sea-island structure, when enough amounts of nanoparticles were added. Meanwhile the introduction of enough amounts of OA-Fe3O4nanoparticles effectively enhanced the foaming ability of LLDPE/PS blend at semi-solid state during scCO2batch foaming. The mechanism analysis for the change of foaming behavior showed that the improved foaming capacity resulted from the change of the phase structure of LLDPE/PS blends and heterogeneous nucleation of OA-Fe3O4nanofillers. Sorption and desorption measurements showed that the addition of OA-Fe3O4nanoparticles in the LLDPE/PS blend increased the solubility of CO2, and the presence of enough amount of OA-Fe3O4decreased the desorption rate of CO2in the initial period of depressurization process, which are beneficial to cell nucleation and growth. Furthermore, it was found that the melt behavior and crystalline properties of LLDPE/PS blends were not the key factors to improved foaming behavior of the blends in the presence of OA-Fe3O4nanoparticles.
