Process for improving the properties of polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...

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528502, 528503, C08F 600

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active

053248163

ABSTRACT:
This invention relates to a process for improving the optical, thermal and/or mechanical properties of a polymer by subjecting a melt of the polymer to a shearing action at an effective shear rate, as for example a shear rate of greater than about 100 sec.sup.-1, for a time sufficient to improve said properties.

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A. Ajji et al. "Chain Entanglement and Viscoelastic Properties of Molten Polymers" Jrnl of Polymer Science: Part B: Polymer Physics, vol. 24/1983-90 (1986).
R. Schertzer et al. "Shear and Thermal History Effects in Polypropylen Melts" Jrnl of Applied Science, vol. 31, 809-821 (1986).
A. Rudin et al. "Shear Modification of Polymers" Polymer Engineering and Science, Mid-Jun. 1983, vol. 23, No. 8.

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