کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1400004 | 984518 | 2010 | 7 صفحه PDF | دانلود رایگان |
New silarylene–siloxane–acetylene polymers have been synthesized by coupling reactions employing 1,3-bis(p-ethynylphenyl)-1,1,3,3-tetraphenyldisiloxane (3) as the key monomer. Their thermal properties have been evaluated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). All of the new polymers showed good thermal stability, with their temperatures at 5% weight loss (Td5) being higher than 540 °C under nitrogen and higher than 460 °C in air. Their char yields at 1000 °C under N2 were above 80%. Broad exothermic peaks, attributable to reaction of the acetylenic units, were observed by DSC analysis in the temperature range 270–450 °C.
Three new silarylene–siloxane–acetylene polymers have been synthesized by coupling reactions employing 1,3-bis(p-ethynylphenyl)-1,1,3,3-tetraphenyldisiloxane as the key monomer. All of the polymers showed good thermal stability, with their temperatures at 5% weight loss being higher than 540 °C under nitrogen and 460 °C in air.Figure optionsDownload as PowerPoint slide
Journal: European Polymer Journal - Volume 46, Issue 3, March 2010, Pages 465–471