Abstract
Aromatic poly(1,3,4-oxadiazole-amide-ester)s have been synthesized by low temperature solution polycondensation reaction of equimolar amounts of aromatic diamines containing preformed 1,3,4-oxadiazole rings with diacid chlorides containing preformed ester linkages. The polymers showed high thermal stability with initial decomposition temperature being above 365 °C and glass transition temperature in the range of 215–260 °C. The weight average molecular weight was in the range of 91,000–257,000 and polydispersity is in the range of 1.64–5. The polymer films showed good mechanical properties with tensile strength in the range of 40–91 MPa, elastic modulus in the range of 2.22–3.98 GPa and elongation at break in the range of 1.85–7.37%. Conformational parameters of polymers have been calculated by Monte Carlo method with allowance for hindered rotation and discussed in relation with some physical properties.
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Sava, I., Ronova, I. & Bruma, M. Synthesis of Poly(1,3,4-oxadiazole-amide-ester)s and Study of the Influence of Conformational Parameters on their Physical Properties. Polym J 38, 940–948 (2006). https://doi.org/10.1295/polymj.PJ2006033
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DOI: https://doi.org/10.1295/polymj.PJ2006033
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