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- W295383226 abstract "Abstract : Novel polybenzobisazoles containing benzothiazole pendents were prepared by the reaction of 2-benzothiazole or 2,5-dibenzothiazole terephthalic acids with the appropriate aminomercapto, aminohydroxy or tetraamino monomers in polyphosphoric acid at elevated temperatures. The polymerizations were carried out at concentrations (10-18%) which would promote anistropic reaction mixtures. Intrinsic viscosities in range of 4-19d1/g were measured in methanesulfonic acid at 30 C. Thermogravimetric-mass spectral analysis in vacuo showed that the pendent benzothiazole group was the initial product of thermal degradation, maximizing at 590 C. Anisotropic polymerization mixtures could be wet-spun into fiber with modulus values between 25-30 MSI and tenacity values up to 350 KSI." @default.
- W295383226 created "2016-06-24" @default.
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- W295383226 date "1990-11-16" @default.
- W295383226 modified "2023-09-24" @default.
- W295383226 title "Synthesis and Properties of Rigid-Rod Benzobisazole Polymers Containing Benzothiazole Pendent Groups" @default.
- W295383226 doi "https://doi.org/10.21236/ada234742" @default.
- W295383226 hasPublicationYear "1990" @default.
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