聚砜链段长度对聚砜-尼龙6嵌段共聚体性能的影响

合成了一系列不同摩尔比的聚砜-尼龙6嵌段共聚物.研究了共聚体中聚砜链段长短及含量对共聚体流动性、耐热性、耐水性以及力学性能的影响研究结果表明:随聚砜链段分子量的增大和含量的增加,共聚体的流动性明显下降;随聚砜含量增加,共聚体的玻璃化转变温度单调上升;耐水性增强;模量下降.聚砜-尼龙6嵌段共聚物较尼龙6均聚物有更优异的耐甲酸能力、较聚砜均聚物有更好的耐有机溶剂和耐开裂能力.

EFFECT OF POLYSULFONE SEQUENCE LENGTH AND CONTENT ON THE PROPERTIES OF POLYSULFONE NYLON 6 BLOCK COPOLYMERS

A series of rigid-rigid polysulfone-nylon 6 (PSF-N6) block copolymera containing polysulfone and nylon 6 segments of varying molar composition have been synthesized. The effect of PSF equence length and content on the prooessibility, heat-resistance, water-absorption and mechanical properties of the PSF-N6 block copoly-mers were studied.It has been shown that the processibility of the copolymer decreases when the amount and M. W. of PSF increases in the copolymers, and the glass transition temperature increases monotonically as a function of polysulfone content. As the polysulfone content increases, water-resistance of the copolymer increases, and the modulus decreases.Due to the semi-crystalline nature of PSF-N6 block copolymer, the solvent and environmental stress crack resistance of the copolymers are significantly improved comparing with that of the polysulfone homopolymer. The copolymers are more formic acid resistant than N6, presumably due to the introduction of polysulfone segments.