多次扫描温度对熔融共混PPS/PEEK中PPS组分的结晶行为的影响

CRYSTALLIZATION BEHAVIOR OF PPS COMPONENT IN PPS AND PEEK MELT-BLENDS(I)

用DSC研究了多次扫描最高温度对PPS/PEEK溶融共混物熔体降温结晶中PPS组分的结晶行为的影响 .在 32 0°C熔融 ,PPS的结晶温度 (Tc)明显比在 4 0 0°C熔融的高 .32 0°C多次熔融 ,PPS的Tc逐渐降低 ,而 4 0 0°C多次熔融 ,PPS的Tc则提高 .最后 ,4 0 0°C熔融的Tc反而比32 0°C熔融的高出 8°C .在 32 0°C多次熔融 ,共混物中PPS组分的Tc由单峰分裂为双峰 ,4 0 0°C多次熔融 。

High performance crystal/crystal blends of poly(phonylene sulfide) and poly (ether ether ketone )(PPS/PEEK) have been prepared by melt-blending. The effect of melt temperature of multiple-scans, PEEk content and the size of PEEK particle on the crystallization behavior of PPS component in the meit-blends has been investigated by differential scanning claorimetry (DSC). The crystallization temperature of PPS melted at 320°C is higher than that of PPS melted at 400°C.