摘要
利用原子力显微镜(AFM)研究了3种分子量的聚氧乙烯(PEO)超薄膜的等温结晶晶体的形貌。结果表明:随着分子量的增大,在云母基底上生长的晶体从Flat-on晶体转变为Edge-on晶体,且晶体生长过程逐渐由表面成核机制(NL)控制转变为由熔体扩散机制(DL)控制;片晶厚度随着等温结晶温度(Tc)的升高而逐渐增大;在Tc为20-35℃之间时,等温结晶初期片晶生长由NL控制,结晶后期由DL控制,而在35℃以上,片晶生长则由NL控制。
The isothermal crystallization of three molecular weights poly（ethylene oxide）（PEO） ultrathin film at different temperature and the crystal morphology of PEO were investigated by atomic force microscope（AFM）.The results show that： with the increasing of molecular weight,PEO chain in the crystal region transforms from Flat-on to Edge-on,and the controlling factor of crystal growth process changes from nucleation-limited（NL） to diffusion-limited（DL）;the lamellar thickness of PEO lamellar increases with increasing isothermal crystallization temperature（Tc）;in the range from 20℃ to 35℃,lamellar growth is controlled by NL during the early stage of isothermal crystallization,and controlled by DL during the later stage;when Tc is over 35℃,lamellar growth is controlled by NL.
出处
《塑料科技》
CAS
北大核心
2013年第4期47-50,共4页
Plastics Science and Technology
基金
河南省科技厅重点攻关项目(082102280002)
关键词
聚氧乙烯
原子力显微镜
超薄膜
片晶厚度
形貌
Poly（ethylene oxide）（PEO）
Atomic force microscope（AFM）
Ultrathin film
Lamellar thickness
Morphology
