کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5210139 | 1382876 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Examining the thermo-mechanical properties of novel cyanate ester blends through empirical measurement and simulation Examining the thermo-mechanical properties of novel cyanate ester blends through empirical measurement and simulation](/preview/png/5210139.png)
Three cyanate ester monomer or oligomer species: 2,2-bis(4-cyanatophenyl)propane 1, 1-1-bis(4-dicyanatophenyl)ethane 2, and the oligomeric phenolic cyanate (Primaset⢠PT30) 3, are blended in various ratios to form binary mixtures, formulated with copper(II) acetylacetonate (200 ppm) in dodecylphenol (1% w/v active copper suspension) and cured (2 K/min to 150 °C + 1 h; 2 K/min to 200 °C + 3 h) followed by a post cure (2 K/min to 260 °C + 1 h). Thermal analysis using DSC reveals good agreement with literature data for the homopolymers: typical polymerisation enthalpies of ca. 97-98 kJ/mol. cyanate are obtained for 1 and 2, with slightly lower values (ca. 80-90 kJ/mol.) obtained for Primaset⢠PT30. DMTA data show the possibility of using binary blends of the polymers to yield novel materials with similar thermal and mechanical properties to Primasetâ¢Â PT30, while improving the processability of the more highly aromatic oligomer. Two of the homopolymers (1 and 2) and a binary (1:1) blend of the same were simulated. Molecular dynamics experiments reveal good agreement with empirical data generated using DSC, DMTA and TGA.
Journal: Reactive and Functional Polymers - Volume 72, Issue 9, September 2012, Pages 596-605