{"title":"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","authors":"Pratiksha Gami, Manish Badole, Asish Kumar Das, Hari Narayanan Vasavan, Samriddhi Saxena, Neha Dagar, Sunil Kumar","doi":"10.1007/s10965-025-04321-3","DOIUrl":null,"url":null,"abstract":"<div><p>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 (σ<sub>DC</sub>) of ~ 1.23 × 10<sup>−14</sup> S cm<sup>−1</sup>. Adding PVP to the polymer causes additional relaxation because of the PVP/PVDF-HFP interface, which increases the blend's dielectric constant <i>ε</i><sub><i>r</i></sub> 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.</p></div>","PeriodicalId":658,"journal":{"name":"Journal of Polymer Research","volume":"32 3","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"PVP incorporation effects on the structural, thermal, electrical, and mechanical properties of PVDF-HFP/PVP blend\",\"authors\":\"Pratiksha Gami, Manish Badole, Asish Kumar Das, Hari Narayanan Vasavan, Samriddhi Saxena, Neha Dagar, Sunil Kumar\",\"doi\":\"10.1007/s10965-025-04321-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>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 (σ<sub>DC</sub>) of ~ 1.23 × 10<sup>−14</sup> S cm<sup>−1</sup>. Adding PVP to the polymer causes additional relaxation because of the PVP/PVDF-HFP interface, which increases the blend's dielectric constant <i>ε</i><sub><i>r</i></sub> 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.</p></div>\",\"PeriodicalId\":658,\"journal\":{\"name\":\"Journal of Polymer Research\",\"volume\":\"32 3\",\"pages\":\"\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-03-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Polymer Research\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10965-025-04321-3\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Polymer Research","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10965-025-04321-3","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
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.
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.