{"title":"A novel filler free silicone rubber biomaterial. II. Radiation chemical and physical evaluation.","authors":"A S Chawla","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>Hexamethylcyclotrisiloxane was polymerized at 60 degrees C by gamma radiation to yield filler free silicone rubber (FFSR). The G (crosslinking) value of 23.5 was found for the FFSR polymerized for 4 hours, compared to about 2 for the pure polydimethylsiloxane (PDMS). The sol fractions for both FFSR and cross-linked PDMS varied between 5-7%. The FFSR and the cross-linked PDMS both had tensile strength of about 1 kg per cm2 but FFSR was not brittle and could be extended as much as 500% before breaking. It is believed that the marked improvement in physical properties of FFSR is due to the formation of domains of highly cross-linked material which act as \"internal filler\".</p>","PeriodicalId":75990,"journal":{"name":"Journal of bioengineering","volume":"2 3-4","pages":"231-40"},"PeriodicalIF":0.0000,"publicationDate":"1978-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of bioengineering","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Hexamethylcyclotrisiloxane was polymerized at 60 degrees C by gamma radiation to yield filler free silicone rubber (FFSR). The G (crosslinking) value of 23.5 was found for the FFSR polymerized for 4 hours, compared to about 2 for the pure polydimethylsiloxane (PDMS). The sol fractions for both FFSR and cross-linked PDMS varied between 5-7%. The FFSR and the cross-linked PDMS both had tensile strength of about 1 kg per cm2 but FFSR was not brittle and could be extended as much as 500% before breaking. It is believed that the marked improvement in physical properties of FFSR is due to the formation of domains of highly cross-linked material which act as "internal filler".
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