STRUCTURE PROPERTY RELATIONSHIP IN POLYBUTADIENE POLYAMIDE MULTIBLOCK COPOLYMERS

Two kinds of aromatic-aliphatic polyamide oligomers were newly prepared by the reactant pairs of 3,4 prime -oxydianiline-adipic acid and 3,4 prime -oxydianiline-azelaic acid. These oligomers were then condensed separately with alpha , omega -polybutadienedicarboxylic acid giving two series of polybutadiene-polyamide multiblock copolymers. Properties of four series of polybutadiene-polyamide multiblock copolymers, whose polyamide blocks consisted of not only newly prepared polyamides but also previously synthesized aromatic polyamides derived fro 4,4 prime -oxydianiline-isophthalic acid and 3, 4 prime -oxydianiline-isophthalic acid, were investigated on the view point of structure-property relationship. A larger extent of the T// g depression of polybutadiene phase, and higher tensile strength and modulus were observed in the block copolymers having aromatic polyamides compared with those having aliphatic ones.