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Polyethylene-Based Single Polymer Composites Prepared under Elongational Flow for High-Voltage Applications
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-09-22 , DOI: 10.1021/acs.iecr.0c02846 Zhao-Xia Huang 1 , Ming-Liang Zhao 1 , Jin-Ping Qu 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-09-22 , DOI: 10.1021/acs.iecr.0c02846 Zhao-Xia Huang 1 , Ming-Liang Zhao 1 , Jin-Ping Qu 1
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Recently, polyethylene (PE)-based single polymer composites (SPCs) have been found to be potential candidates for high-voltage applications (HVAs) due to their ability to form supramolecular structures and their recyclabilities. However, a deeper understanding of the controls and evolutions of such a structure is still needed. Herein, by introducing elongational flow into the melt compounding, we could successfully control the structure of polymeric materials and prepared PE-SPCs with additive-level ultrahigh-molecular-weight polyethylene (UHMWPE) for HVAs. The elongational flow-induced multiscale multilevel structure was confirmed and analyzed through X-ray diffraction. Specifically, under elongational flow, we fabricated PE-SPCs with the shish-kebab structure and 2D variated crystal units. The melting behaviors of each sample were studied, and the results indicated an elongational flow-induced cocrystallization phenomenon of low-density polyethylene and UHMWPE during melt processing. Benefiting from the as-formed structure, we obtained PE-SPCs with enhanced mechanical properties and more HVA-adaptable dielectric properties. Particularly, the yield strength, tensile strength, and Young’s modulus of PE-SPC (sample R80) show 42, 23, and 29% enhancement than the virgin PE, respectively. The dielectric constant and dielectric loss of our PE-SPC are determined to be around 2.94 and 2 × 10–4 at 1000 Hz, respectively. Moreover, 10-fold decreases in conductivites in both AC and DC of our PE-SPC are achieved after melt compounding under elongational flow. In conclusion, this work gives a comprehensive understanding of the PE-SPCs’ structure evolution under elongational flow, and the structure–property relationship was also determined. It is believed that this work can promote the development of SPCs for HVAs.
中文翻译：
拉伸流制备高电压应用的聚乙烯基单聚合物复合材料
近年来，由于聚乙烯（PE）的单聚合物复合材料（SPC）形成超分子结构的能力和可回收性，它们已成为高压应用（HVA）的潜在候选者。但是，仍然需要对这种结构的控制和演化有更深入的了解。在本文中，通过将拉伸流引入熔融混料中，我们可以成功地控制聚合物材料的结构，并使用添加级超高分子量聚乙烯（UHMWPE）制备用于HVA的PE-SPC。通过X射线衍射确认并分析了伸长流动诱发的多尺度多级结构。具体而言，在伸长流动条件下，我们制造了具有烤肉串结构和2D可变晶体单元的PE-SPC。研究了每个样品的熔融行为，结果表明，低密度聚乙烯和UHMWPE在熔体加工过程中出现了伸长流致共结晶现象。受益于所形成的结构，我们获得了具有增强的机械性能和更多的HVA介电性能的PE-SPC。特别是，PE-SPC（样品R80）的屈服强度，抗张强度和杨氏模量分别比纯PE增强42％，23％和29％。确定我们的PE-SPC的介电常数和介电损耗约为2.94和2×10 PE-SPC（样品R80）的屈服强度，拉伸强度和杨氏模量分别比原始PE增强42％，23％和29％。确定我们的PE-SPC的介电常数和介电损耗约为2.94和2×10 PE-SPC（样品R80）的屈服强度，拉伸强度和杨氏模量分别比原始PE增强42％，23％和29％。确定我们的PE-SPC的介电常数和介电损耗约为2.94和2×10在1000 Hz时分别为–4。此外，在伸长流动下熔融复合后，PE-SPC的交流和直流电导率均降低了10倍。总之，这项工作全面了解了PE-SPC在伸长流动下的结构演变，并确定了其结构与性质的关系。相信这项工作可以促进用于HVA的SPC的发展。
更新日期：2020-10-15
中文翻译：
拉伸流制备高电压应用的聚乙烯基单聚合物复合材料
近年来，由于聚乙烯（PE）的单聚合物复合材料（SPC）形成超分子结构的能力和可回收性，它们已成为高压应用（HVA）的潜在候选者。但是，仍然需要对这种结构的控制和演化有更深入的了解。在本文中，通过将拉伸流引入熔融混料中，我们可以成功地控制聚合物材料的结构，并使用添加级超高分子量聚乙烯（UHMWPE）制备用于HVA的PE-SPC。通过X射线衍射确认并分析了伸长流动诱发的多尺度多级结构。具体而言，在伸长流动条件下，我们制造了具有烤肉串结构和2D可变晶体单元的PE-SPC。研究了每个样品的熔融行为，结果表明，低密度聚乙烯和UHMWPE在熔体加工过程中出现了伸长流致共结晶现象。受益于所形成的结构，我们获得了具有增强的机械性能和更多的HVA介电性能的PE-SPC。特别是，PE-SPC（样品R80）的屈服强度，抗张强度和杨氏模量分别比纯PE增强42％，23％和29％。确定我们的PE-SPC的介电常数和介电损耗约为2.94和2×10 PE-SPC（样品R80）的屈服强度，拉伸强度和杨氏模量分别比原始PE增强42％，23％和29％。确定我们的PE-SPC的介电常数和介电损耗约为2.94和2×10 PE-SPC（样品R80）的屈服强度，拉伸强度和杨氏模量分别比原始PE增强42％，23％和29％。确定我们的PE-SPC的介电常数和介电损耗约为2.94和2×10在1000 Hz时分别为–4。此外，在伸长流动下熔融复合后，PE-SPC的交流和直流电导率均降低了10倍。总之，这项工作全面了解了PE-SPC在伸长流动下的结构演变，并确定了其结构与性质的关系。相信这项工作可以促进用于HVA的SPC的发展。
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