Preparation and microcellular foaming of crosslinked polyethylene-octene elastomer by ionic modification

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2023-07-20 DOI:10.1016/j.supflu.2023.106035

Feng Zhang , Xiaoli Zhang , Kesong Yu , Kun Li , Junji Hou , Yang Yang , Changyu Shen , Jingbo Chen , Chul B. Park

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Abstract

Polyethylene-octene elastomer (POE) has the advantages associated with thermoplastics and rubbers, and is therefore widely used in various fields. To achieve better performance, zinc oxide (ZnO) and stearic acid were introduced into maleic anhydride-grafted POE to create ionically crosslinked structures. Owing to these crosslinked structures, the tensile strength and creep resistance of POE were improved. After crosslinking, the viscoelastic properties of the polymer matrix were enhanced, thus stabilizing the cellular structure of the foams prepared by supercritical CO₂ foaming. When the foaming condition was 8 MPa and 55 °C, the cell size of the POE-10ZnO foam was reduced from 50 µm to 23 µm, and the cell density was improved by approximately an order of magnitude higher than that of neat POE foam. The cyclic resilience of the foams was also investigated. The results showed that the POE-10ZnO foam exhibited good rebound resilience and high compressive strength.

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离子改性交联聚乙烯-辛烯弹性体的制备及微孔发泡

聚乙烯辛烯弹性体(POE)具有热塑性塑料和橡胶的优点，因此被广泛应用于各个领域。为了获得更好的性能，将氧化锌(ZnO)和硬脂酸引入马来酸酐接枝POE中，形成离子交联结构。由于这些交联结构，POE的拉伸强度和抗蠕变性能得到了提高。交联后增强了聚合物基体的粘弹性，从而稳定了超临界CO2发泡泡沫的细胞结构。当发泡条件为8 MPa和55℃时，POE- 10zno泡沫的孔尺寸从50µm减小到23µm，孔密度比纯POE泡沫提高了约一个数量级。对泡沫材料的循环回弹性进行了研究。结果表明，POE-10ZnO泡沫具有良好的回弹性能和较高的抗压强度。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.