Reliability of capillary rheometer measurement of polymer melts
نویسندگان
چکیده
منابع مشابه
Capillary rheometry of polymer melts – Simulation and experiment
This paper discusses shear viscosity measurements of polymer melts by the capillary rheometer. Particular emphasis is placed on investigating the effects of viscous heating and pressure dependence of viscosity in capillary flows. The capillary flow problem is addressed by means of numerical simulation using the finite element method to solve the equations of continuity, momentum and energy alon...
متن کاملعنوان روایی پایایی نسخه فارسی پرسشنامه سرمایه اجتماعی اونیکس در سالمندان validity and reliability of the persian version of onyx social capital measurement
مقدمه: یکی از چالشهایی که اغلب سالمندان با آن مواجهند برقراری ارتباط با افراد جدید و بزرگتر کردن دایره روابط اجتماعی خود می باشد. برقراری روابط اجتماعی و ایجاد و تقویت شبکه اجتماعی در سالمندان ممکن است منجر به ایجاد سرمایه اجتماعی شود. سرمایه اجتماعی یک مسئله چند بعدی است که ابعاد مختلفی از ساختار اجتماعی را در بر می گیرد. در این پژوهش بر آن بوده ایم که به تهیه نسخه فارسی پرسشنامه سرمایه اجتماع...
Measurement of dynamic capillary pressure and viscosity via themulti-sample micro-slit rheometer
Article history: Received 14 October 2008 Received in revised form 30 January 2009 Accepted 18 February 2009
متن کاملViscosity and density measurement methods for polymer melts
In this article review of density and viscosity measurement methods is presented, including ultrasonic pulse echo methods, which are capable to measure these properties of polymer melts. The methods are presented according to measurement principles, methodology, accuracy and possibility to measure density and viscosity of polymer melts on-line during extrusion process. Such measurements are ver...
متن کاملProperties of Confined Polymer Melts
Properties of simple models of confined linear polymer chains were studied by means of the Monte Carlo method. Model chains were built of united atoms (statistical segments) and embedded to a simple cubic lattice. Then polymers were put into a slit formed by two parallel impenetrable surfaces. Chain lengths were varied up to 800 segments and the density of the polymer melt was changed up to 0.5...
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ژورنال
عنوان ژورنال: Journal of Applied Polymer Science
سال: 1969
ISSN: 0021-8995,1097-4628
DOI: 10.1002/app.1969.070130521