摘要
在哈克转矩流变仪中,研究了操作温度、螺杆转速、共混时间和相容剂苯乙烯马来酸酐共聚物(SMA)对尼龙6/聚苯乙烯(PA6/PS)共混物形成双连续相组分比例范围的影响。结果表明:操作温度、螺杆转速、共混时间对共混物形成双连续相组分比例范围的影响不大,SMA的加入使形成双连续相的比例范围大大减小,SMA阻碍分散相间的碰撞、降低其凝聚是产生这种现象的主要原因。对双连续相PA6/PS(50/50,质量分数/%)共混物进行静态热处理,用扫描电镜(SEM)观察形态发现:在一定温度下双连续相相尺寸随热处理时间增加而增大;温度越高,相尺寸随时间增大的速度也大大加快,但仍能够保持双连续相态。在一定温度下,连续相经过破裂、凝聚,使两组分的界面面积降低是相态粗化的主要原因。
In Haake torque rheometer, it was investigated that temperature, rotor speed, mixing time and the copolymer of styrene and maleic acid （SMA）-compatibiliser had effect on the percolation threshold value of co-continuous PA6/PS blend. The results showed that temperature, rotor speed and mixing time had little influence on the percolation threshold value; when compatibiliser （SMA） was added, the range of the region of phase co-continuity was largely narrowed because of the decreased possibility for recombination and coalescence. By the quiescent annealing of co-continuous PA6/PS, the blend morphology was examined at three different temperatures using SEM method. Co- continuous morphologies of 50/50（mass fraction/%）PA6/PS blend stayed co-continuous with annealing but showed an increase in phase size with time and the coarsening of the morphology was speeded at higher temperature. The interracial area tends to decrease when the blend is kept at an elevated temperature, which results in an increase in the phase size of the co-continuous blend.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2006年第8期36-39,44,共5页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(50390097)
关键词
双连续相
共混
形态
相容剂
co-continuous
blend
morphology
compatibiliser
