Molding blends of silicone polymer / polypropylene with durable resistant to extreme conditions based on migration and compatibility of molecular chains

IF 5.8 2区 化学 Q1 POLYMER SCIENCE
Zhiyong Wang , Baotao Huang , Xinchao Li , Yi Pan , Zhaohui Zheng , Jinni Deng
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Abstract

Because of low surface energy, silicone polymers would easily peel off from polypropylene (PP) substrate as hydrophobic coatings and they are incompatible with PP in melt-blending process as well. Therefore, ethylene polymers modified with both silicone and alkane side-groups were prepared by nucleophilic substitution in this work. It was confirmed that these prepared polymers could migrate and aggregate to the surface of the blends at that melting temperature when blended with PP due to the low surface energy and high entropy of silicone side groups. Meanwhile, chain entanglement was achieved between alky side-groups of silicone polymers and polymer chain of PP by melt-blending process, so that the compatibility of the blends was improved and the bonding force of two polymers increased simultaneously. Accordingly, molding blends with stable and durable hydrophobility were successfully gained based on migration of silicone and entanglement of alkane and PP. It’s noticeable that the water contact angle of the blend remained to be about 106° from 113°, even soaking in acid (pH = 1) and alkali (pH = 14) solutions, deionized water and anhydrous ethanol, or under multiple strong frictions. This will provide a facile and effective strategy to endow general materials with durable antifouling properties directly by injection molding without additional coating.

Abstract Image

根据分子链的迁移性和兼容性,对硅树脂聚合物/聚丙烯混合物进行模塑,使其具有耐极端条件的耐用性
由于表面能较低,硅聚合物作为疏水涂层很容易从聚丙烯(PP)基材上剥离,而且在熔融混合过程中与聚丙烯也不相容。因此,本研究采用亲核取代的方法制备了硅烷侧基和烷烃侧基改性的乙烯聚合物。结果表明,由于有机硅侧基的低表面能和高熵,这些制备的聚合物在与聚丙烯共混时可在该熔融温度下迁移并聚集到共混物的表面。同时,通过熔融共混工艺,有机硅聚合物的烷基侧基与 PP 的聚合物链之间实现了链缠结,从而改善了共混物的相容性,同时提高了两种聚合物的结合力。因此,基于有机硅的迁移和烷烃与 PP 的缠结,成功地获得了具有稳定和持久亲水性的模塑共混物。值得注意的是,即使在酸(pH = 1)和碱(pH = 14)溶液、去离子水和无水乙醇中浸泡,或在多重强烈摩擦下,混合物的水接触角仍能从 113°保持在 106°左右。这将为通过注塑成型直接赋予普通材料持久防污性能提供一种简便有效的策略,而无需额外涂层。
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来源期刊
European Polymer Journal
European Polymer Journal 化学-高分子科学
CiteScore
9.90
自引率
10.00%
发文量
691
审稿时长
23 days
期刊介绍: European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas: Polymer synthesis and functionalization • Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers. Stimuli-responsive polymers • Including shape memory and self-healing polymers. Supramolecular polymers and self-assembly • Molecular recognition and higher order polymer structures. Renewable and sustainable polymers • Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites. Polymers at interfaces and surfaces • Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications. Biomedical applications and nanomedicine • Polymers for regenerative medicine, drug delivery molecular release and gene therapy The scope of European Polymer Journal no longer includes Polymer Physics.
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