Analysis of Rubbers by FTIR -Method to Remove Calcium Carbonate in Rubbers-

Introduction

Calcium carbonate, a white-colored powder with the chemical formula CaCO₃, is widely used in many applications which can be found all around us. For instance, one of its most obvious applications is its use as the principal ingredient of chalk. However, calcium carbonate is also widely used in rubbers and plastics, paper and tooth powder, etc. as a filling material. When measuring the infrared spectrum of rubber that contains calcium carbonate, a large calcium peak masks peaks originating from some of the rubber constituents, which could cause difficulties in qualitative analysis. Here we introduce a pretreatment method for removing the calcium carbonate from rubber that contains calcium carbonate.

January 29, 2010 GMT