-
认证会员 第 9 年
北京仪尊时代科技有限公司
认证:工商信息未核实
- 产品分类
- 品牌分类
-
仪企号北京仪尊时代科技有限公司
-
解决方案
-
界面流变仪应用 Linear Viscoelastic Behavior of End-T
发布:北京仪尊时代科技有限公司浏览次数:919ABSTRACT:We investigate therheological behavior of Langmuir monolayers consisting of polyisoprene chains tethered by one end to the air/water interface. These 10-50 nm thick monolayers provide model systems of a molten polymer brush for which the ends can move within the interface. Their linear viscoelastic properties are determined by applying a small-amplitude shear flow within the interface plane and investigated as a function of surface density and length of tethered chains. When increasing the chain length, we observe a transition from a liquidlike to at ransient network behavior typical of entangled bulk polymer melts. The terminal relaxation time and the effective bulk zero shear viscosity of themonolayers are 2-3 orders of magnitude higher than those of a linear bulk polyisoprene melt of identical molecular weight. Both quantities are shown to exhibit an enhanced molecular weight dependence and to increase with surface density.2004-11-12相关产品 -
免责声明
①本网刊载上述内容,并不代表本网赞同其观点或证实其内容的真实性,不承担此类作品侵权行为的直接责任及连带责任
②若本站内容侵犯到您的合法权益,请及时告诉,我们马上修改或删除。邮箱:hezou_yiqi