Han, Ying; Fang, Xing Zhong; Zuo, Xiu Xia published the artcile< The influence of molecular weight on properties of melt-processable copolyimides derived from thioetherdiphthalic anhydride isomers>, Electric Literature of 118-45-6, the main research area is thiobisisobenzofurandione oxydianiline polyimide strength melt processing.
A series of novel melt-processable copolyimides based on mixed thioetherdiphthalic anhydride (TDPA) isomers and 4,4′-oxydianiline (4,4′-ODA) were synthesized by a one-step polycondensation. Mol. weight of copolyimides was controlled with stoichiometric offsets in favor of 4,4′-ODA. All of the resulting polyimides (PIs) were amorphous and have nice solubility With increase in mol. weight, the glass transition temperatures of copolyimides increased from 248 to ca. 270 °C based on DSC measurements. These copolyimides displayed excellent thermal and thermooxidative stability, as evidenced by thermogravimetric anal. in both air and nitrogen atmospheres. The melt processability, thermoplastic response, melt stability, and their dependence on mol. weight of the copolyimides were investigated in terms of rheol. measurements by monitoring the melt viscosity after residence at various times and temperatures
Journal of Materials Science published new progress about Complex modulus, tan δ. 118-45-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H3ClO3, Electric Literature of 118-45-6.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics