Evaluation of Excess Free Volume and Internal Pressure in Binary Mixtures of Methyl Methacrylate(MMA) with Alcohols

R Vadamalar,V Arumugam,P Mani,R Balakrishnan

doi:10.1155/2009/505981

Abstract

Methyl methacrylate (MMA) is an important monomer attracting the attention of industrialists and scientists because of its various applications and reactivity. The knowledge of thermodynamic and transport properties of MMA in alcohols and other organic solvents is useful in industrial processes. Ultrasonic and viscometric parameters offer simple, easy and accurate ways for calculating several physical parameters which throw light on molecular interactions in solutions. In this paper, the interactions of two alcohols;tert-butanol andiso-butanol with MMA are reported for the first time. Comparison has been made on the interactive nature of the two alcohols. Computation of free volume, internal pressure and excess free volume has been made for the entire concentration range. Existence of mesomeric effects of MMA is clearly seen and the role of structure of alcohols is observed.

Highlights

Many engineering problems require quantitative data of the viscosity and density of the liquid mixtures
Methyl methacrylate (MMA) monomer is an excellent base material used in dentistry, ophthalmology and other industries
In this report we have evaluated the free volume (Vf), Internal pressure and excess free volume (VfE) at three different temperatures (303, 313, 323 K) in MMA +

Summary

Introduction

Many engineering problems require quantitative data of the viscosity and density of the liquid mixtures. Several workers[11,12,21,22,23,24] evaluated the free volume and internal pressure using different relations and discussed the intermolecular interactions on the basis of these parameters. In this report we have evaluated the free volume (Vf), Internal pressure (пi) and excess free volume (VfE) at three different temperatures (303, 313, 323 K) in MMA + Where M is the molecular weight (gm), U is the ultrasonic velocity (m/sec), Η is the viscosity (m Pas-s), K is a constant equal to 4.28 X 109 independent of temperature, and Vf is free volume, in millilitre per mole.

Results

Conclusion