{"title":"Morphology and dielectric properties of uniaxially and biaxially-oriented polycarbonate capacitor films","authors":"S. Yen, L. Lowry, C. Bankston, V. Capozzi","doi":"10.1109/CEIDP.1989.69575","DOIUrl":null,"url":null,"abstract":"A reflective X-ray diffraction method developed to determine the absolute X/sub c/ (crystallinity) of UX and BX (uniaxially and biaxially oriented) PC (polycarbonate) film is described. Conditions for achieving optimum properties for producing BX high-X/sub c/ and isotropic PC film were found. For BX PC film of identical thickness to UX PC film the electric breakdown strength was found to be proportional to X/sub c/. The thermal and mechanical properties as well as the direct-current electric breakdown strengths of the newly developed isotropic high-X/sub c/ BX PC film are compared with those of the anisotropic commercial PC capacitor film. Capacitors made from the high-X/sub c/ isotropic BX PC film when subjected to a 1000-hour 100 degrees C, 42-V DC life test showed no change in dissipation factor and no change in capacitance, and they met 100 degrees C insulation resistance test requirements. In general, it is concluded that this novel BX PC film is much superior to the traditional UX commercial capacitor PC film.<<ETX>>","PeriodicalId":10719,"journal":{"name":"Conference on Electrical Insulation and Dielectric Phenomena,","volume":"14 1","pages":"375-383"},"PeriodicalIF":0.0000,"publicationDate":"1989-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference on Electrical Insulation and Dielectric Phenomena,","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CEIDP.1989.69575","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
A reflective X-ray diffraction method developed to determine the absolute X/sub c/ (crystallinity) of UX and BX (uniaxially and biaxially oriented) PC (polycarbonate) film is described. Conditions for achieving optimum properties for producing BX high-X/sub c/ and isotropic PC film were found. For BX PC film of identical thickness to UX PC film the electric breakdown strength was found to be proportional to X/sub c/. The thermal and mechanical properties as well as the direct-current electric breakdown strengths of the newly developed isotropic high-X/sub c/ BX PC film are compared with those of the anisotropic commercial PC capacitor film. Capacitors made from the high-X/sub c/ isotropic BX PC film when subjected to a 1000-hour 100 degrees C, 42-V DC life test showed no change in dissipation factor and no change in capacitance, and they met 100 degrees C insulation resistance test requirements. In general, it is concluded that this novel BX PC film is much superior to the traditional UX commercial capacitor PC film.<>
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