Synthesis of Polyisoprene via Miniemulsion Polymerisation: Effect on Thermal Behaviour, Colloidal Properties and Stereochemistry

The synthesis of polyisoprene (isoprene rubber) in latex form was carried out by conventional emulsion polymerisation and by miniemulsion polymerisation using hexadecanol as a hydrophobe and the two methods compared. The influence of an emulsion system, monomer and surfactant concentration on conver...

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Bibliographic Details
Published inJournal of rubber research Vol. 21; no. 4; pp. 236 - 255
Main Authors Chouytan, J., Beraheng, S., Kalkornsurapranee, E., Fellows, C. M., Kaewsakul, W.
Format Journal Article
LanguageEnglish
Published Singapore Springer Singapore 01.01.2018
Subjects
Ceramics
Chemistry and Materials Science
Composites
Glass
Materials Engineering
Materials Science
Natural Materials
Plant Biochemistry
Polymer Sciences
emulsion
Polyisoprene
free radical
polymerisation
gel
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Summary:The synthesis of polyisoprene (isoprene rubber) in latex form was carried out by conventional emulsion polymerisation and by miniemulsion polymerisation using hexadecanol as a hydrophobe and the two methods compared. The influence of an emulsion system, monomer and surfactant concentration on conversion, particle size, gel content and coagulation were investigated. Molecular characteristics, thermal behaviour and stereochemistry were investigated by GPC, DSC, TGA and 1 H-NMR. With decreasing monomer concentration and increasing surfactant concentration, the number of stabilised droplets in the miniemulsion was found to increase. The greater number of loci for the polymerisation reaction thus obtained a lead to an increased conversion as well as a reduced gel content.
ISSN:1511-1768
2524-3993
DOI:10.1007/BF03449173