Masters Theses

Abstract

"An apparatus has been constructed to investigate the capillary shear degradation of polymer solutions. Maximum shear rates obtainable under flow conditions which could be characterized as nonturbulent were on the order of 10₅ sec⁻¹. The effect of calculated shear rate, initial molecular weight, and number of passes through the capillary tube on the degradation of polystyrene (with M̄v from 22,000 to 1,770,000) solutions in toluene (0.1 wt.%) were studied. The tests in the 0.0105 in. ID stainless steel tube at a calculated shear rate of 1.36 x 10₅ sec⁻¹ show that, for equal number of passes, the lower the initial molecular weight of the polymer, the less the extent of degradation. An asymptotic value of the intrinsic viscosity is approached with pass number; shear stress has little effect on the intrinsic viscosity after one pass"--Abstract, page ii.

Advisor(s)

Mayhan, Kenneth G.

Committee Member(s)

Patterson, G. K. (Gary Kent), 1939-
Hansen, Peter G., 1927-2010

Department(s)

Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

vii, 53 pages

Note about bibliography

Includes bibliographical references (pages 63-65).

Rights

© 1970 Tyan-Faung Niu, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Polymer solutionsPolymers -- RheologyPolymers -- Fluid dynamicsPolymers -- DeteriorationPolystyrene

Thesis Number

T 2470

Print OCLC #

6028335

Electronic OCLC #

864829109

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