Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Synthesis of styrene based liquid-filled polymeric nanocapsules by the use of RAFT-mediated polymerization in miniemulsion
Polymer, Volume 46, No. 11, Year 2005
Notification
URL copied to clipboard!
Description
Nanocapsules (below 100 nm) with liquid cores and molar mass controlled polystyrene shells were synthesized by an in situ miniemulsion polymerization reaction in the presence of a RAFT (reversible addition fragmentation chain transfer) agent. The formation of structured particles with the targeted core/shell morphology, i.e. liquid cores and polymeric shells, is extremely dependent on the type of RAFT agent used in conjunction with the type of initiator used. Different RAFT agents lead to different polymerization rates, thus resulting in different chain lengths as a function of time. This will influence viscosity and consequently chain mobility and can therefore cause a deviation from the desired morphology. The type of initiator used influences the surface activity of entering oligomers and is therefore also an important factor in obtaining the correct structure. Results showed that a RAFT agent that causes no rate retardation (phenyl 2-propyl phenyl dithioacetate, PPPDTA), used in conjunction with a surface active initiating species (potassium persulfate, KPS), is able to lock the locus of polymerization at the droplet/water interface. This results in entering oligomers being anchored at the droplet/water interface with consequent core/shell (nanocapsule) formation only if the RAFT agent used leads to a sufficiently rapid increase in chain length with time and thus a restriction of chain mobility of the mediated species. © 2005 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
van Zyl, André J.P.
South Africa, Stellenbosch
Stellenbosch University
Bosch, Rutger F.P.
South Africa, Stellenbosch
Stellenbosch University
Netherlands, Eindhoven
Technische Universiteit Eindhoven
McLeary, James B.
South Africa, Stellenbosch
Stellenbosch University
Sanderson, Ronald D.
South Africa, Stellenbosch
Stellenbosch University
Klumperman, Bert
South Africa, Stellenbosch
Stellenbosch University
Netherlands, Eindhoven
Technische Universiteit Eindhoven
Statistics
Citations: 58
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1016/j.polymer.2005.03.025
ISSN:
00323861
Research Areas
Environmental