Characterization and Some Insights into the Reaction Chemistry of Polymethylsilsesquioxane or Methyl Silicone Resins
المؤلفون المشاركون
Suto, Michitaka
Itoh, Maki
Auner, Norbert
Oka, Fukuyo
Cook, Simon D.
المصدر
International Journal of Polymer Science
العدد
المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-17، 17ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2012-10-18
دولة النشر
مصر
عدد الصفحات
17
التخصصات الرئيسية
الملخص EN
Structural characterization of a polymethylsilsesquioxane (PMSQ) and a DT-type methyl silicone resin (MeDT) has been carried out by various instrumental analyses including GPC, NMR, gas chromatography, and gas chromatography-mass spectrometry.
Although the PMSQ had a Mw around 5000, the resin contained a significant amount of low molecular weight species consisting of T2 [MeSi(OH)O2/2] and T3 [MeSiO3/2] units, ranging from T3 4T2 3 to T3 8T2 2 including many isomers.
One isomer of T3 6T2 2 was isolated of which structure was determined as a cage structure.
The species are supposed to consist mainly of cyclotetra- and cyclopentasiloxanes, but presence of strained rings such as cyclotrisiloxane rings also was suggested.
In MeDT, species in which the T2 units in the molecules from PMSQ is replaced with D2 [Me2SiO2/2] were found, for example, T3 6D2 2, suggesting that general silicone resins consist of similar structures as silsesquioxanes.
The Mark-Houwink exponent for these methyl resins was ~0.3, indicating the molecular shape to be compact.
Investigation on the formation chemistry of the cubic octamers indicates that siloxane bond rearrangement is an important mechanism in the molecule build-up process.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Itoh, Maki& Oka, Fukuyo& Suto, Michitaka& Cook, Simon D.& Auner, Norbert. 2012. Characterization and Some Insights into the Reaction Chemistry of Polymethylsilsesquioxane or Methyl Silicone Resins. International Journal of Polymer Science،Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-478730
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Itoh, Maki…[et al.]. Characterization and Some Insights into the Reaction Chemistry of Polymethylsilsesquioxane or Methyl Silicone Resins. International Journal of Polymer Science No. 2012 (2012), pp.1-17.
https://search.emarefa.net/detail/BIM-478730
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Itoh, Maki& Oka, Fukuyo& Suto, Michitaka& Cook, Simon D.& Auner, Norbert. Characterization and Some Insights into the Reaction Chemistry of Polymethylsilsesquioxane or Methyl Silicone Resins. International Journal of Polymer Science. 2012. Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-478730
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-478730
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر