Chain transfer to mercaptopropionic acid, reactivities of vinyl acetate and butyl acrylate copolymers and other factors affecting mini-emulsion polymerization reactions

Date of Publication

2000

Document Type

Master's Thesis

Degree Name

Master of Science in Chemistry

Subject Categories

Chemistry

College

College of Science

Department/Unit

Chemistry

Thesis Adviser

Clovia Isabel Z. Holdsworth

Defense Panel Chair

Jaime Raul O. Janairo

Defense Panel Member

Emmanuel Garcia
Jerry Dy

Abstract/Summary

Emulsion polymerization has gained considerable interest for decades now due to its industrial applications. It allows synthesis of high molecular weight polymers, it is a clean method employing water as its solvent and the latex may be processed directly into products with minimal purification. The focus on mini-emulsion is consistent with the growing trend in the development of microscale processes.This study aims to determine the efficiency of mercaptopropionic acid in controlling the molecular weights of polymers by chain transfer, investigate the composition of vinyl acetate-butyl acrylate copolymers, and other factors that generally affect mini-emulsion reactions.The reactions were carried out at 60 degrees Centigrade raised to 80 degrees Centigrade after one hour and allowed to continue for a period of three hours using semicontinuous method of monomer addition, and agitation by magnetic stirrer. The monomer systems studied were butyl acrylate, vinyl acetate and styrene. Sodiumdodecyl benzene sulfonate, sodium lauryl sulfate, and nonyl phenol ethoxylate were used as emulsifiers.Mercaptopropionic acid was found to

Abstract Format

html

Language

English

Format

Print

Accession Number

TG02997

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

87 leaves

Keywords

Emulsion polymerization; Chemical reactions; Polymerase chain reaction; Acids; Vinyl acetate

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