Wet melting point analysis

Details Wet melting point analysis Wet melting point analysis

1981-03-23

1982-12-21

Goldstein, Herbert

Thermal measuring and testing

Transformation point determination

374 10, 526330, 526342, G01N 2504

Patent

active

043646751

ABSTRACT:
A method for determining the amount of copolymerized vinyl monomer in a acrylonitrile/vinyl monomer copolymer is provided. The method is based on the fact that increasing the vinyl monomer content of the copolymer reduces its melting point. The method consists of first determining the melting point of the copolymer while the copolymer is saturated with water. The presence of water reduces the melting point to a temperature below the range where thermal degradation of the copolymer occurs. The amount of copolymerized vinyl monomer in the copolymer can then be determined by comparing its melting point in the presence of water to that of corresponding copolymers in which the vinyl monomer content thereof is known and varies from copolymer to copolymer.

REFERENCES:
patent: 3468840 (1969-09-01), Heiberger et al.
Thermal Analysis Bulletin by Dupont #900A-1, 2-8-66.
Slade, P. E., Thermochim. Acta, 1 (1970) pp. 459-463.

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