| abstract |
An object of the present invention is to provide a semiaromatic polyamide having suitable moldability as various component materials for automobiles and the like and excellent in heat resistance, chemical resistance and mechanical properties, and a molded article thereof. The semiaromatic polyamide (I) of the present invention contains a structural unit derived from terephthalic acid [A] in an amount of 35 to 50 mol%, a structural unit derived from isophthalic acid [B] in an amount of 25 to 40 mol%, an aliphatic dicarboxylic acid [C Derived from an aliphatic diamine [D] having 4 to 12 carbon atoms in an amount of 15 to 35 mol% (provided that the total of [A], [B] and [C] is 100 mol% Wherein the molar ratio ([A] / [B]) is 65/35 to 50/50, the molar ratio ([C] / [B]) is 30/70 to 50/50, The heat of fusion (ΔH) obtained in the DSC is 20 to 40 mJ / mg and the intrinsic viscosity [η] is 0.7 to 1.6 dl / g. |