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- W1903754392 abstract "The diamine 1,4-phenylene di(oxy-4,4¢-aniline) was prepared via the nucleophilic substitution reaction and polymerized with different dianhydride either by one step solution polymerization reaction or two step procedure. These polymers had inherent viscosities ranging from 0.64-0.83 dl/gm. Few of the polymers were soluble in most of the organic solvents such as DMSO, DMF, DMAc, NMP and m-Cresol even at room temperature and some were soluble on heating. The degradation temperature of the resultant polymers falls in the ranges from 300-450 o C in nitrogen (with only 10% weight loss). Specific heat capacity at 200 o C ranges from -4.0322-2.4059 Jg -1 k -1 . The maximum degradation temperature ranges from 550-600 o C.Tg values of the polyimides were found from 207 to 228 o C.The activation energy and enthalpy of the polyimides were found in the range of 36.6-94.5 KJ/mole and 34.8-92.5 KJ/mole k -1 and the moisture absorption from 0.24-0.75%." @default.
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- W1903754392 date "2013-04-19" @default.
- W1903754392 modified "2023-09-27" @default.
- W1903754392 title "Synthesis and Characterization of Polyimides Based on Flexible Diamine" @default.
- W1903754392 doi "https://doi.org/10.17628/ecb.2013.2.631-636" @default.
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