04798081 is referenced by 212 patents and cites 5 patents.

A method and apparatus for analyzing a solution of a crystalline or a semi-crystalline polymer sample to determine a crystallinity versus weight percent profile concurrently with viscosity average molecular weight. The polymer sample is first precipitated from solution over a cooling temperature gradient to produce a precipitated polymer sample, which is precipitated as a function of its crystallinity. The precipitated polymer sample is then eluted and redissolved over a heating temperature gradient to produce successive fractions of a fractionated polymer sample solution, which are measured to produce concentration and specific viscosity data from which the intrinsic viscosity and viscosity average molecular weight are calculated.

Title
High temperature continuous viscometry coupled with analytic temperature rising elution fractionation for evaluating crystalline and semi-crystalline polymers
Application Number
802354
Publication Number
4798081
Application Date
December 22, 1987
Publication Date
January 17, 1989
Inventor
Daniel G Moldovan
Danbury
TX, US
Lonnie G Hazlitt
Lake Jackson
TX, US
Agent
Nis H Juhl
Timothy S Stevens
Assignee
The Dow Chemical Company
MI, US
IPC
G01N 11/00
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