Martin Wortmann, N. Frese, Alexander L. Heide, Johannes Brikmann, Oliver I. Strube, Raphael Dalpke, A. Gölzhäuser, E. Moritzer, Bruno Hüsgen
{"title":"Examination of Interpenetrating Polymer Networks of Polyurea in Silicone Molds Arising during Vacuum Casting Processes","authors":"Martin Wortmann, N. Frese, Alexander L. Heide, Johannes Brikmann, Oliver I. Strube, Raphael Dalpke, A. Gölzhäuser, E. Moritzer, Bruno Hüsgen","doi":"10.1080/03602559.2017.1410838","DOIUrl":null,"url":null,"abstract":"ABSTRACT We present an in-depth investigation of the aging effects in silicone molds for vacuum casting processes. Their lifetime is limited to a few production cycles due to contamination with the diisocyanate component of polyurethane casting materials. Using thermogravimetric analysis measurements, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and helium-ion-microscopy the chemical and physical mechanisms of the aging process have been identified. It has been shown that a diffusion process of diisocyanate into the cavity surface leads to the formation of interpenetrating polymer networks of polyurea derivatives in silicone rubber. This has been proven by extracting and analyzing polyurea of low molecular weights from the silicone. GRAPHICAL ABSTRACT","PeriodicalId":20629,"journal":{"name":"Polymer-Plastics Technology and Engineering","volume":"42 1","pages":"1524 - 1529"},"PeriodicalIF":0.0000,"publicationDate":"2018-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer-Plastics Technology and Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/03602559.2017.1410838","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Materials Science","Score":null,"Total":0}
引用次数: 6
Abstract
ABSTRACT We present an in-depth investigation of the aging effects in silicone molds for vacuum casting processes. Their lifetime is limited to a few production cycles due to contamination with the diisocyanate component of polyurethane casting materials. Using thermogravimetric analysis measurements, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and helium-ion-microscopy the chemical and physical mechanisms of the aging process have been identified. It has been shown that a diffusion process of diisocyanate into the cavity surface leads to the formation of interpenetrating polymer networks of polyurea derivatives in silicone rubber. This has been proven by extracting and analyzing polyurea of low molecular weights from the silicone. GRAPHICAL ABSTRACT
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
