摘要
综述了硅藻土、硅胶、蒙脱土、滑石粉和氮化硼等无机成核剂,聚酰胺、羧酸盐等有机成核剂对聚甲醛(POM)结晶性能和力学性能的影响。由弹性体和滑石粉组成的复合成核剂不仅可使POM的球晶尺寸减小至2.1μm,更重要的是使POM的成型收缩率从3.3%降至2.0%。开发POM成核剂一是要根据POM的结构特征,通过分子设计,合成适合POM专用的系列成核剂;二是通过对现有成核剂的物理或化学复合,开发复合成核剂,发挥不同组分的协同效应。
This paper summarized in detail the influences of organic and inorganic nucleating agents on crystallization characteristics and mechanical properties of polyoxymethylene（POM）. A composite nucleator consisting of elastomer and talc not only reduced spherulite size of POM to 2.1um, but also, more importantly, made molding shrinkage rate of POM fall from 3.3% to 2.0%. There are two technical ideas for developing POM nucleators： one is to synthesize special nucleators through molecular design and in terms of the structural characteristics of POM; the other is to prepare composite nucleators by chemically or physically compounding the existing nucleating agents so as to fully exert the synergistic effects of different components.
出处
《合成树脂及塑料》
CAS
北大核心
2010年第3期75-80,共6页
China Synthetic Resin and Plastics
关键词
聚甲醛
成核剂
复合成核剂
结晶
polyoxymethylene
nucleator
complex nucleating agent
crystallization
