STUDIES IN THE POLYMERISATION OF VINYL ACETATE.
STUDIES IN THE POLYMERISATION OF VINYL ACETATE.
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Date
1979-06
Authors
FOLARANMI, FELICIA MODUPE
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Abstract
The emulsion polymerisation of vinyl acetate has been studied
at 400C +/- 1 using benzoyl peroxide and ferrous iron as the initiator
system. Three different emulsifying agents are used. The effect
of emulsifying agent, its concentration and the time of polymerisation
on the emulsion properties, the polymer yield and molecular
weight have been investigated.
The results show that the generalised theory of emulsion
polymerisation applies to a limited extent to this system. The rate
of polymerisation is constant between 0-80 percent polymerisation.
The molecular weight decreases with time of polymerisation. This
has been attributed to increasing rate of initiation with time.
The effect of molecular weight on the tensile properties of the polymer film has been studied. The results show that polymer
samples prepared with varying emulsifier concentration have
narrower molecular weight distribution when compared to samples
obtained at varying time of polymerisation and constant emulsifier
concentration.
Description
A Thesis presented to the Ahmadu Bello University
in partial fulfillment for the Degree of
MASTER OF SCIENCE
IN POLYMER SCIENCE AND TECHNOLOGY
Keywords
STUDIES,, POLYMERISATION,, VINYL ACETATE,