Characterization of polystyrene surface by a modified two-liquid laser contact angle goniometry
Characterization of polystyrene surface by a modified two-liquid laser contact angle goniometry
复制标题
用改进的两液激光接触角测角法表征聚苯乙烯表面
DOI：
10.1163/156856195x00725
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
W. V. Chang
中科院分区：
文献类型：
--
作者：
X. Qin;W. V. Chang
人们认识到，表面自由能γ的非色散分量γab在聚合物与其他基底的相互作用中发挥着重要作用。由于难以测量固体聚合物表面的表面自由能，已经开发了许多方法来估计γ。这里的目的是研究如何使用我们最近提出的模型和改进的双液体接触角技术来表征高能聚合物表面。首先，通过测定水在聚苯乙烯（PS）表面与一系列正构烷烃的接触角，得到了PS表面自由能的色散分量γd。然后利用几种关键非烷烃液体在表面上的接触角数据，通过我们的三参数半经验模型计算其γab。在给定表面热力学参数的情况下，我们的模型还能计算PS与其它液体之间的界面自由能γSL。并试图将γSL与银纹化相平衡浓度联系起来。
It is recognized that the non-dispersive components, γab, of the surface free energies, γ, play an important role in the interactions of a polymer with other substrates. Because of the difficulty in measuring the surface free energy of a solid polymer surface, many methods to estimate γ have been developed. The purpose here is to examine how to characterize a high energy polymer surface using our recently proposed model and the modified two-liquid contact angle technique. First, the dispersion component, γd, of surface free energy of polystyrene (PS) is obtained by measuring the contact angles of water on PS surface in a series of n-alkanes. Its γab is then calculated by our three-parameter semi-empirical model using the contact angle data of several key non-alkane liquids on the surface. Given the surface thermodynamic parameters, our model also enables us to calculate the interfacial free energies, γSL, between PS and other liquids. An attempt to relate γSL to the equilibrium concentrations of crazing s...