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Microwave‐assisted polycondensation of 4,4′‐(hexafluoroisopropylidene)‐ N,N ′‐bis(phthaloyl‐ L ‐leucine) diacid chloride with aromatic diols
Author(s) -
Mallakpour Shadpour E.,
Hajipour AbdolReza,
Khoee Sepideh
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000923)77:13<3003::aid-app26>3.0.co;2-6
Subject(s) - condensation polymer , inherent viscosity , polymer chemistry , imide , chloride , chemistry , polymerization , intrinsic viscosity , hydroquinone , specific rotation , monomer , polyamide , polymer , organic chemistry
A new facile and rapid polycondensation reaction of 4,4′‐(hexafluoroisopropylidene)‐ N , N ′‐bis(phthaloyl‐ L ‐leucine) diacid chloride (1) with several aromatic diols such as phenol phthalein (2a), bis phenol‐A (2b), 4,4′‐hydroquinone (2c), 1,4‐dihydroxyanthraquinone (2d), 1,8‐dihydroxyanthraquinone (2e), 1,5‐dihydroxy naphthalene (2f), dihydroxy biphenyl (2g), and 2,4‐dihydroxyacetophenone (2h) was performed by using a domestic microwave oven in the presence of a small amount of a polar organic medium such as o ‐cresol. The polymerization reactions proceeded rapidly, compared with the conventional solution polycondensation, and was completed within 10 min, producing a series of optically active poly(ester‐imide)s with quantitative yield and high inherent viscosity of 0.50–1.12 dL/g. All of the above polymers were fully characterized by IR, elemental analyses, and specific rotation. Some structural characterization and physical properties of this optically active poly(ester‐imide)s are reported. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 3003–3009, 2000