PVP掺入对PVDF-HFP/PVP共混材料结构、热学、电学和机械性能的影响

IF 2.6 4区 化学 Q3 POLYMER SCIENCE
Pratiksha Gami, Manish Badole, Asish Kumar Das, Hari Narayanan Vasavan, Samriddhi Saxena, Neha Dagar, Sunil Kumar
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引用次数: 0

摘要

采用溶液浇铸法制备了不同质量分数PVP的聚偏氟乙烯-共六氟丙烯/聚乙烯吡罗烷酮共混物(PVDF-HFP/PVP)柔性独立膜(厚度~ 60µm)。x射线衍射(XRD)证实,PVP的加入增强了半结晶聚合物PVDF-HFP的无定形区。傅里叶变换红外显微镜(FT-IR)研究了大分子共混膜的PVP和PVDF-HFP之间的相互作用。采用扫描电镜(SEM)研究了PVP加入PVDF-HFP对共混物混相的影响。热重分析(TGA)和差示扫描量热分析(DSC)结果证实PVDF-HFP与PVP完全混溶。此外,采用Coats-Redfern模型计算了所有样品的活化能。PVP的均匀分散显著提高了pvdf - hfp基共混物的热稳定性。PVDF-HFP: PVP(75:25)共混聚合物的最小电导率(σDC)为~ 1.23 × 10−14 S cm−1。由于PVP/PVDF-HFP界面的存在,聚合物中加入PVP会产生额外的弛豫,当PVP含量为25%时,共混物的介电常数εr增加到9.6。动态力学分析(DMA)表明,混合聚合物的存储模量有所提高,25% PVP样品在~ 45°C下的存储模量为~ 0.23 GPa。这些有利的改进表明,PVDF-HFP/PVP共混物非常适合绝缘应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

PVP incorporation effects on the structural, thermal, electrical, and mechanical properties of PVDF-HFP/PVP blend

PVP incorporation effects on the structural, thermal, electrical, and mechanical properties of PVDF-HFP/PVP blend

Flexible free-standing membranes (thickness ~ 60 µm) of poly (vinylidene fluoride-co-hexafluoropropylene)/polyvinyl pyrrolidone (PVDF-HFP/PVP) blends with various weight fractions of PVP were fabricated by the solution casting technique. The inclusion of PVP enhanced the semi-crystalline polymer PVDF-HFP's amorphous region, as confirmed by X-ray diffraction (XRD). Fourier transform infrared microscopy (FT-IR) investigations of the macromolecular blend membranes revealed interactions between the PVP and PVDF-HFP. The impact of adding PVP to PVDF-HFP on the miscibility of the resulting blends was examined using scanning electron microscopy (SEM). The results of thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) confirmed a complete miscibility of PVDF-HFP with PVP. Additionally, the Coats-Redfern model was used to calculate the activation energies of all samples. The uniform dispersion of PVP significantly boosted the thermal stability of the PVDF-HFP-based blend. The PVDF-HFP: PVP (75:25) blend polymer showed the minimum electrical conductivity (σDC) of ~ 1.23 × 10−14 S cm−1. Adding PVP to the polymer causes additional relaxation because of the PVP/PVDF-HFP interface, which increases the blend's dielectric constant εr to 9.6 for the sample with 25% PVP. Dynamic mechanical analysis (DMA) showed an improvement in the storage modulus of blended polymer, with the 25% PVP sample exhibiting a storage modulus of ~ 0.23 GPa at ~ 45 °C. These advantageous improvements suggest that the PVDF-HFP/PVP blend is well-suited for insulating applications.

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来源期刊
Journal of Polymer Research
Journal of Polymer Research 化学-高分子科学
CiteScore
4.70
自引率
7.10%
发文量
472
审稿时长
3.6 months
期刊介绍: Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.
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