阴离子表面活性剂发泡MCPA6的制备与性能表征

Preparation and Characterization of Foamed MCPA6 by Anionic Surfactants

利用阴离子表面活性剂对单体浇铸尼龙6(MCPA6)体系进行发泡,制备具有泡孔的MCPA6,使材料轻量化。利用扫描电镜(SEM)对材料的泡孔进行观察,利用差示扫描量热(DSC)和热失重分析(TGA)表征其性能。研究结果表明:十二烷基硫酸钠(SDS)发泡MCPA6形成网络状的孔隙,显著降低了MCPA6的成型收缩率;串联的微球促进了MCPA6分子链的运动,提高了其结晶速率;同时抑制了MCPA6的六方晶系γ晶型的形成,并降低了材料的结晶度。发泡对MCPA6晶型的抑制和结晶度的降低有利于其吸收冲击能。

By using anionic surfactant to foam monomer casting nylon 6(MCPA6),MCPA6 with foam cell was prepared so as to make the material lightweight.The cell structure of the material was observed by scanning electron microscopy(SEM),and its properties were characterized by differential scanning calorimetry(DSC)and thermogravimetric analysis(TGA).The results showed that the shrinkage of MCPA6 foamed with sodium dodecyl sulfate(SDS)decreased remarkably by forming a series of pores,which promoted the movement of the molecular chain of MCPA6 and increased its crystallization rate,while inhibited the formation of the gamma crystal form of MCPA6 and reduced the crystallinity of the material.The inhibition of foaming on the crystalline form and the decrease of crystallinity of MCPA6 were beneficial to its absorption of impact energy.