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6th International Symposium on Electrets,(ISE 6) Proceedings.最新文献

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Short-circuit thermally stimulated currents in polystyrene-poly methyl methacrylate blends 聚苯乙烯-聚甲基丙烯酸甲酯共混物中的短路热刺激电流
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38569
J. Keller, R. Baghel, R. Singh, S. Datt
{"title":"Short-circuit thermally stimulated currents in polystyrene-poly methyl methacrylate blends","authors":"J. Keller, R. Baghel, R. Singh, S. Datt","doi":"10.1109/ISE.1988.38569","DOIUrl":"https://doi.org/10.1109/ISE.1988.38569","url":null,"abstract":"Investigations of short-circuit thermally stimulated depolarization currents have been made on 20- mu m-thick, polystyrene-polymethyl-methacrylate (PS/PMMA) blends containing different weight percentages of PMMA. The observed currents decrease for higher values of the forming field and temperature and eventually become anomalous. These characteristics are considered to be due to the screening effect of the space charge formed near the electrodes. The TSDC (thermally stimulated depolarization current) characteristic have been found to be sensitive to blend composition.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128570506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Polarization phenomena as a characteristic of the 'structure' of the polymeric amorphous phase 极化现象是聚合物非晶相“结构”的一个特征
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38601
A. Bernés, D. Chatain, C. Lacabanne
{"title":"Polarization phenomena as a characteristic of the 'structure' of the polymeric amorphous phase","authors":"A. Bernés, D. Chatain, C. Lacabanne","doi":"10.1109/ISE.1988.38601","DOIUrl":"https://doi.org/10.1109/ISE.1988.38601","url":null,"abstract":"Polarization phenomena associated with amorphous polycarbonate have been investigated by thermally stimulated current spectroscopy. The relaxation modes are characteristic of its thermodynamic history. The existence of compensation laws reveal the presence of local order in the amorphous phase. The existence of domains of some 20 to 40 AA is postulated, using the granular model of G.S.Y. Yeh (1972).<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125118667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Role of interfaces on a natural composite bioelectret: bone 界面在天然复合生物驻极体上的作用:骨
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38603
A. Lamure, M. Fauran-Clavel, C. Lacabanne, M. Harmand, M. Vignoles, G. Bonel
{"title":"Role of interfaces on a natural composite bioelectret: bone","authors":"A. Lamure, M. Fauran-Clavel, C. Lacabanne, M. Harmand, M. Vignoles, G. Bonel","doi":"10.1109/ISE.1988.38603","DOIUrl":"https://doi.org/10.1109/ISE.1988.38603","url":null,"abstract":"The aim of this study is the characterization of interfaces in calcified tissues. Thermally stimulated currents and gel permeation chromatography have been used for investigating extracts and residues from calf femoral diaphysis at various stages of demineralization. In the residues, evolution of molecular mobility shows that the organic-mineral linkage is ensured by several proteins. Collagen is not directly linked to apatite.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126474345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Concerning the rho relaxation amorphous PET crystallization by thermally stimulated discharge 热激发放电对rho弛豫非晶PET结晶的影响
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38565
J. Belana, P. Colomer
{"title":"Concerning the rho relaxation amorphous PET crystallization by thermally stimulated discharge","authors":"J. Belana, P. Colomer","doi":"10.1109/ISE.1988.38565","DOIUrl":"https://doi.org/10.1109/ISE.1988.38565","url":null,"abstract":"The thermal depolarization of amorphous PET (polyethylene terephthalate) electrets metallized on one side and corona charged at T/sub p/>70 degrees C exhibits, between 20 degrees C and 105 degrees C, three relaxations: alpha , rho /sub 1/ and rho /sub 2/. The origin of rho /sub 2/ is free charge injected from the electrodes, while rho /sub 1/ could be associated with a uniform bulk mechanism. The p/sub 1/ peak has a been located in electrets metallized on both sides and polarized, between 73 degrees C and 79 degrees C, only in the isothermic phase, so that at T/sub p/>79 degrees C it overlaps with rho . The stimulated crystallization by thermal steps in amorphous PET samples, metallized on both sides, indicates that rho /sub 1/ changes with the crystallinity and becomes the alpha /sub c/ relaxation of the crystalline PET.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122021047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The interaction of fission fragments with electron beam charged polyfluoroethylene propylene 裂变碎片与带电荷的聚氟乙烯丙烯电子束的相互作用
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38544
S. Berggren, G. John
{"title":"The interaction of fission fragments with electron beam charged polyfluoroethylene propylene","authors":"S. Berggren, G. John","doi":"10.1109/ISE.1988.38544","DOIUrl":"https://doi.org/10.1109/ISE.1988.38544","url":null,"abstract":"Interactions of fission fragments with charged polyfluoroethylene propylene (FEP) create detectable electrical signals characteristic of the event. FEP charged with 30-50-keV electrons can attain internal electrostatic fields that approach the dielectric strength. Fission of /sup 235/U by thermal neutrons produces fission fragments with energies of 60-100 MeV that deposit their energy in 20-40 mu m of FEP. This induces charge-pair production and a temporary radiation-induced conduction path detectable with conventional radiation detection electronics. The exact mechanisms and characteristics of the phenomena are being investigated for possible use in small, simple, self-powered thermal neutron detectors.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129161557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
AC poling of solution cast films of polyvinylidene fluoride/lead zirconate composites 聚偏氟乙烯/锆酸铅复合材料液铸膜的交流极化
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38616
D. Sinham, P. Pillai
{"title":"AC poling of solution cast films of polyvinylidene fluoride/lead zirconate composites","authors":"D. Sinham, P. Pillai","doi":"10.1109/ISE.1988.38616","DOIUrl":"https://doi.org/10.1109/ISE.1988.38616","url":null,"abstract":"Summary form only given, as follows. Composite samples were prepared in the form of thin films (50-80 mu m) by solution casting techniques for different weight fractions of PZT (lead zirconate titanate) in a PVDF (polyvinylidine fluoride) matrix. Samples were AC poled at a temperature of approximately 180 degrees C. The AC poling at elevated temperatures considerably enhances the dielectric constant and is found to be a more efficient way of poling composite films than conventional DC poling. Scanning electron microscopy (SEM) and X-ray diffraction studies were done to correlate the increment in dielectric constant with structural modification.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129764272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Peak shift due to the electric field on PETP corona charged foils PETP电晕带电箔上电场引起的峰移
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38590
J. A. Malmonge, G. F. Leal Ferreira, J. Giacometti, R. A. Moreno
{"title":"Peak shift due to the electric field on PETP corona charged foils","authors":"J. A. Malmonge, G. F. Leal Ferreira, J. Giacometti, R. A. Moreno","doi":"10.1109/ISE.1988.38590","DOIUrl":"https://doi.org/10.1109/ISE.1988.38590","url":null,"abstract":"Annealed PETP (polyethylene terephthalate) samples which are corona charged give only one open-circuit current peak on heating from room temperature, the thermograms being independent of the polarity and metal electrodes. However, the peak shifts to a lower temperature for increasing initial potential. These results indicate that an electric-field-activated conductivity is at work. Frozen free-volume charges may explain higher currents observed on the low-temperature part of the thermogram.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126594071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Normal and anomalous thermally stimulated currents and space charge in polypropylene 聚丙烯中的正常和异常热激电流和空间电荷
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38557
S. Datt, R. Baghel, R. Singh
{"title":"Normal and anomalous thermally stimulated currents and space charge in polypropylene","authors":"S. Datt, R. Baghel, R. Singh","doi":"10.1109/ISE.1988.38557","DOIUrl":"https://doi.org/10.1109/ISE.1988.38557","url":null,"abstract":"The short-circuit thermally stimulated discharge (TSD) currents for isotactic commercial grade polypropylene (PP) foil thermoelectrets, poled under different field and temperature conditions, indicate the distribution of traps in energy. Anomalous TSDCs flowing in the same direction as the charging current, observed in electrets poled above 100 degrees C, are attributed to injected space charges and the blocking condition of the electrodes. Experimental data indicate that as the carrier mobility increases with the temperature and as the density of injected space charge increases with the applied field, a high charging field and a high temperature result in a high rate of return of carriers to the injecting electrode.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129437453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigations of structural changes in PVDF by modified X-ray texture methods 改进x射线织构法研究PVDF的结构变化
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38547
D. Geiss
{"title":"Investigations of structural changes in PVDF by modified X-ray texture methods","authors":"D. Geiss","doi":"10.1109/ISE.1988.38547","DOIUrl":"https://doi.org/10.1109/ISE.1988.38547","url":null,"abstract":"Structural changes in the alpha -phase of poly(vinylidenefluoride) (PVDF) due to poling have been investigated. Besides the conversion of the nonpolar alpha -phase into the polar alpha /sub p/-phase, a change of the orientation state is observed. The effects can be separated. Conclusions are drawn regarding the molecular mechanism of polarization.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"564 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133322211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermally stimulated currents of corona treated Teflon-FEP electrets 电晕处理聚四氟乙烯- fep驻极体的热刺激电流
6th International Symposium on Electrets,(ISE 6) Proceedings. Pub Date : 1988-09-01 DOI: 10.1109/ISE.1988.38608
C. Dias, J. Marat-Mendes, J. Giacometti
{"title":"Thermally stimulated currents of corona treated Teflon-FEP electrets","authors":"C. Dias, J. Marat-Mendes, J. Giacometti","doi":"10.1109/ISE.1988.38608","DOIUrl":"https://doi.org/10.1109/ISE.1988.38608","url":null,"abstract":"Thermally stimulated currents of corona-charged Teflon FEP electrets show a single peak around 210 degrees C short polarization times. However, when the polarization time or the corona current is increased, changes either in the maximum or in the position of the peak occur. At the same time a broad current band in the range between 100-180 degrees C appears, while a liquid is formed over the electret surface. Measurements of the charged centroid show no detectable change in the location. The results are tentatively explained in terms of surface traps becoming shallower.<<ETX>>","PeriodicalId":199976,"journal":{"name":"6th International Symposium on Electrets,(ISE 6) Proceedings.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133628300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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