CAJ | 학술논문

利用格子Monte Carlo( MC)模拟方法研究了两嵌段共聚物增容剂AB的链长及浓度对不相容性均聚物A/B共混体系界面性质的影响.研究结果表明,当两嵌段共聚物的体积分数ψC=0.05时,随着两嵌段共聚物分子链长NC从10增至20,界面厚度剧烈减小,而当两嵌段共聚物的分子链长NC进一步增加到60时,界面厚度轻微增加；两嵌段共聚物的取向参数q随着分子链长的增长而增加,即共聚物分子在垂直界面方向的拉伸程度增大.当两嵌段共聚物AB的分子链长NC固定为10时,随着链浓度增大,界面厚度增加,共聚物分子链取向参数q减小,共聚物分子在垂直界面方向的拉伸程度减小.
이용격자Monte Carlo( MC)모의방법연구료량감단공취물증용제AB적련장급농도대불상용성균취물A/B공혼체계계면성질적영향.연구결과표명,당량감단공취물적체적분수ψC=0.05시,수착량감단공취물분자련장NC종10증지20,계면후도극렬감소,이당량감단공취물적분자련장NC진일보증가도60시,계면후도경미증가；량감단공취물적취향삼수q수착분자련장적증장이증가,즉공취물분자재수직계면방향적랍신정도증대.당량감단공취물AB적분자련장NC고정위10시,수착련농도증대,계면후도증가,공취물분자련취향삼수q감소,공취물분자재수직계면방향적랍신정도감소.
We employed Monte Carlo simulation to investigate the effects of chain length and concentration of the diblock copolymer on the interfacial properties between two immiscible homopolymers. When the volume fraction of diblock copolymer is fixed at ψC=0. 05, as the chain length(NC) of diblock copolymer increases from 10 to 20 , the interface thickness decreases significantly;whereas with the chain length of diblock copoly-mer further increasing to NC=60, the interface thickness increases slightly. The orientation parameter q of the diblock copolymer chain enlarges with the increase of the diblock copolymer chain length, which means that the diblock copolymer is more stretched. When the diblock copolymer chain length is fixed as NC=10, as the volume fraction of diblock copolymer increases from ψC=0. 01 to 0. 05 , the interface thickness increases and the diblock copolymer chain orientation parameter q decreases, indicating that the stretching of diblock chain decreases.