초록 ▼

A copolymerized polyamide, comprising amide bonds formed by an aliphatic diamine with 4 to 14 carbon atoms and terephthalic acid, with the existence ratios of distributed respectively adjacent amide bonds satisfying the following formulae (A) and (B), and with the half-crystallization time satisfyin

A copolymerized polyamide, comprising amide bonds formed by an aliphatic diamine with 4 to 14 carbon atoms and terephthalic acid, with the existence ratios of distributed respectively adjacent amide bonds satisfying the following formulae (A) and (B), and with the half-crystallization time satisfying the following formula (C). 0.9≤[XY]obs./[XY]calcd.t1/2<5.5-0.1 (Tm-T)(C) t1/2is the half-crystallization time (seconds). Tm is the melting point (°C.) of the copolymerized polyamide. T is the measuring temperature (°C.) of the half-crystallization time.

대표청구항 ▼

A copolymerized polyamide, comprising: 1) a terephthalamide having a structure (I) of the following formula: [Figure] (I) formed from an aliphatic diamine component and a terephthalic acid component, and 2) at least one of another amide other than said terephthalamide selected from the group consist

A copolymerized polyamide, comprising: 1) a terephthalamide having a structure (I) of the following formula: [Figure] (I) formed from an aliphatic diamine component and a terephthalic acid component, and 2) at least one of another amide other than said terephthalamide selected from the group consisting of: [Figure] (II) [Figure] (III) and [Figure] (IV) and wherein amide bonds X and Y connect said components, said amide bonds being in accordance with the following formulae (A) and (B): 0.9≤(XY)actual/(XY)calcd.1.1(A) 0.9≤(XX)actual/(XX)calcd.1.1(B) and wherein X is an amide bond formed between said aliphatic diamine component having 4 to 14 carbon atoms and said terephthalic acid component, and Y is any amide bond other than X in the polymer structure, (XY) is the frequency of occurrence at which an X amide bond and a Y amide bond occur adjacent to each other relative to all amide bonds present in the polymer structure, (XX) is the frequency of occurrence at which amide bonds X and X occur adjacent to each other relative to all amide bonds in the polymer structure, (XY) calcd. and (XX) calcd. are respectively the values of (XY) and (XX) calculated on the assumption that all of the X and Y amide bonds that are present in the polymer structure are distributed statistically at random, and (XY) actual and (XX) actual are respectively the values of (XY) and (XX) as actually measured from said copolymerized polyamide; and said copolymerized polyamide having a half-crystallization time which is in accordance with the following formula (C): 4.4-0.1(Tm-T)≤log t1/12(Tm-T)(C) wherein t1/2is the half-crystallization time of the copolymerized polyamide in seconds, Tm is the melting point in °C. of the copolymerized polyamide, and T is the temperature in °C. at which the half-crystallization time is measured.