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New block copolymers II. Synthesis and characterization of an ABA‐type block copolymer
Author(s) -
Shit Subhas C.,
Mahato Beni Madhab,
Maiti Mrinal M.,
Maiti Sukumar
Publication year - 1986
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/app.1986.070310106
Subject(s) - copolymer , polymer chemistry , materials science , polymer , condensation polymer , acrylonitrile , solubility , vapor pressure osmometry , viscometer , osmometer , chemistry , viscosity , organic chemistry , vapor pressure , composite material
A new regular ABA‐type triblock copolymer has been synthesized by polycondensation of the acid chloride of carboxy‐terminated butadience‐acrylonitrile rubber (CTBN) with hydroxyterminated polyethylene isophthalate (PEI) oligomer. This block copolymer was characterized by elemental (nitrogen) analysis, vapor pressure osmometry, viscometry, and IR and NMR spectroscopy. Quantitative estimation of block segments has been carried out by measuring the area under peaks assigned to various protons in the NMR spectrum of the polymer. NMR spectral analysis has been found to agree well with the nitrogen analysis of the polymer. The solubility and solution viscosity behavior of the polymer has also been studied.