Abstract
Radical polymerization of N-n-alkylmaleimides (nRMI) with various n-alkyl groups (n=4–18) was carried out in the presence of 2,2′-azobisisobutyronitrile in benzene at 60°C. The high molecular weight polymer (Mn>105) was obtained in a high yield from all nRMIs. The resulting poly(nRMI) were soluble in organic solvents such as benzene, chloroform, and THF, and a thin and tough film was obtained from the solution. It was confirmed that poly(nRMI) showed excellent thermal-stability, i.e., they had a high glass transition temperature and decomposition temperatures. The side-chain crystallization was investigated by differential scanning calorimetry. From the measurement of permeation of oxygen and nitrogen through poly(nRMI), it was revealed that these polymers had a high permeability coefficient of 10−8–10−9 cm3(STP)cm cm−2 s−1 cm Hg−1, which depended intensively on the N-substituents.
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Matsumoto, A., Oki, Y. & Otsu, T. Synthesis, Thermal Properties, and Gas Permeability of Poly(N-n-alkylmaleimide)s. Polym J 23, 201–209 (1991). https://doi.org/10.1295/polymj.23.201
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DOI: https://doi.org/10.1295/polymj.23.201
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