Manufacturing process control and product characterization

Details Manufacturing process control and product characterization Manufacturing process control and product characterization

1991-06-17

1993-04-13

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Effecting a change in a polymerization process in response...

526348, 73 5409, 73 5414, C08F 200

Patent

active

052023958

ABSTRACT:
The viscous and elastic components of a viscoelastic melt, for example a polymer melt, are examined to provide information useful in quality control in the process for the manufacture of the material. Measurement of the entrance pressure drop exhibited by the viscoelastic fluid when forced through a narrow die is shown to be an effective means of preparing polymers of differentiated property characteristics despite otherwise being similar in terms of commonly measured properties of molecular weight and melt index.

REFERENCES:
patent: 4241602 (1980-12-01), Han et al.

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