TY - JOUR
T1 - One-pot synthesis of an alternating copolyimide based on regioselective reaction of a non-symmetrical alicyclic dianhydride
AU - Kudo, Kazuaki
AU - Yoshizawa, Takuya
AU - Hamada, Takashi
AU - Li, Jun
AU - Sakamoto, Seiji
AU - Shiraishi, Shinsaku
PY - 2006/9/4
Y1 - 2006/9/4
N2 - Four constitutionally isomeric copoly(amide acid)s (coPAAs), two alternating and two random, have been successfully obtained from the same combination of one non-symmetrical alicyclic tetracarboxylic dianhydride (1.0 molar equivalents) and two symmetric aromatic diamines (0.5 molar equivalents each) by only slightly changing the reaction procedures. When the reaction mixture is subjected to chemical imidization conditions without isolation of coPAAs, the corresponding copolyimides (coPIs) are obtained in one pot. All of the coPIs are slightly yellow amorphous powders and the solubility of them is similar to each other. The glass transition temperatures of the alternating coPIs are lower in comparison to those of the random coPIs.
AB - Four constitutionally isomeric copoly(amide acid)s (coPAAs), two alternating and two random, have been successfully obtained from the same combination of one non-symmetrical alicyclic tetracarboxylic dianhydride (1.0 molar equivalents) and two symmetric aromatic diamines (0.5 molar equivalents each) by only slightly changing the reaction procedures. When the reaction mixture is subjected to chemical imidization conditions without isolation of coPAAs, the corresponding copolyimides (coPIs) are obtained in one pot. All of the coPIs are slightly yellow amorphous powders and the solubility of them is similar to each other. The glass transition temperatures of the alternating coPIs are lower in comparison to those of the random coPIs.
KW - KGaA alternating copolymer
KW - One-pot synthesis
KW - Polyimides
KW - Step-growth polymerization
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U2 - 10.1002/marc.200600319
DO - 10.1002/marc.200600319
M3 - Article
AN - SCOPUS:33748948363
VL - 27
SP - 1430
EP - 1436
JO - Macromolecular Rapid Communications
JF - Macromolecular Rapid Communications
SN - 1022-1336
IS - 17
ER -