Estimation of dry rubber content in natural rubber latex by differential scanning calorimetry

被引:8
作者
Rejikumar, R. [1 ]
Philip, J. [2 ]
机构
[1] Rubber Res Inst India, Rubber Board PO, Kottayam 686009, Kerala, India
[2] Cochin Univ Sci & Technol, Sophisticated Test & Instrumentat Ctr, Cochin 682022, Kerala, India
关键词
Natural Rubber Latex; Dry rubber content; Differential scanning calorimetry (DSC); Enthalpy change; DSC;
D O I
10.1007/s10973-010-0716-x
中图分类号
O414.1 [热力学];
学科分类号
摘要
Differential Scanning Calorimetry (DSC) is employed to study the changes in enthalpy of natural rubber latex samples when heated under a controlled temperature program. It is found that the mass normalized areas of the DSC curves between room temperature and 170 A degrees C for different latex samples are inversely proportional to the dry rubber content (DRC) of the samples, measured following the weighing and drying method. The changes in total enthalpy of the samples in this temperature range are interpreted as due to the variations in the quantity of water present in the samples. The measurements have been repeated by diluting selected samples with known quantities of water, and it is found that the normalized areas of the DSC curves are directly proportional to the amount of water added to the latex. The method can be used to estimate the DRC of natural rubber latex accurately. Its advantages and limitations are discussed.
引用
收藏
页码:1047 / 1050
页数:4
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