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has been cited by the following article:

• TITLE: Oxidation, Chain Scission and Cross-Linking Studies of Polysiloxanes upon Ageings

  AUTHORS: Namrata S. Tomer, Florence Delor-Jestin, Lawrence Frezet, Jacques Lacoste

  KEYWORDS: Polysiloxane; Degradation; Thermal Properties; Cross-Linking; Cristallinity

  JOURNAL NAME: Open Journal of Organic Polymer Materials, Vol.2 No.2, April 24, 2012

  ABSTRACT: The comparison between physical properties and chemical structures of several polysiloxanes was studied at initial state and upon ageings. Techniques such as densimetry, gel permeation chromatography, FTIR spectroscopy, thermogravim- etric analysis coupled with IR spectroscopy and the new tool photo-DSC were used to give assessments of average mo- lecular weight, chemical evolution, cristallinity and thermal stability. Different types of ageing such as thermal ageing (60?C and 100?C), photo-ageing and acid vapour ageing were performed. After ageing we observed an evolution of chemical structures and physical properties for all samples. The main pathway of degradation is given for each sample. It results in oxidation, chain scission or cross-linking. Cross-linking levels are dependant on the type of ageing, the chemical structure and the initial rate of cristallinity. Cross-linking reactions are favoured after photo-ageing. Oxidation is higher for polysiloxane with aliphatic carbon chain.