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The Physico-Mechanical and Morphological Properties of Cellulose-Filled Polystyrene (PS) and Polyvinyl Acetate (PVAC) Blends

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Description

Download The Physico-Mechanical and Morphological Properties of Cellulose-Filled Polystyrene (PS) and Polyvinyl Acetate (PVAC) Blends. Chemistry students who are writing their projects can get this material to aid their research work.

Abstract

Studies of physico-mechanical and morphological properties of pure and a-cellulose reinforced blends of polystyrene (PS) and poly (vinyl acetate) (PVAc) are reported in this work.

The compression moulded articles of the blends of different compositions (10:90, 20:80, 30:70, 40:60, 50:50, 60:40, 70:30, 80:20 and 90:10, PS/PVAc) were tested for mechanical performance, absorption behaviour, void activity and morphological arrangements.

Comparison of mechanical properties such as tensile strength, modulus of elasticity and elongation at break revealed apparent compatibility domains for 20:80 and 10:90, PS/PVAc for both pure and reinforced blends.

However, the a- cellulose filled blends have enhanced tensile strength for all the compositions.

From the values of the breaking load (in kilonewtons- KN) Vs composition of the blends, there was considerable strength improvement with a-cellulose filler content.

Introduction

Blending procedures had been employed since time immemorial. The principle of blending is geared towards achieving property averaging.

A blend is therefore the physical mixture of two or more substances, without a chemical Linseed oil, a triglyceride of unsaturated fatty acids, is heated with a brittle resin, usually an unsaturated C20 mono carboxylic acid (Mantell, Kopf, Curtis and Rogers, 1942).

The resin itself could be used as a coating, but the linseed oil is incorporated to reduce the brittleness of the product. On the other hand, the linseed oil by itself forms an oily, slow-to-harden coating.

Thus, the principle of property averaging (blending) was recognized a long time ago. The resin contains unsaturation and, presumably during the heating with the oil and the subsequent oxidative cross-linking, is incorporated covalently.

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