Improving the Knowledge and Design of End Groups in Polymers Produced by Free Radical Polymerisation
Author(s)
Busfield, WK
Jenkins, ID
Nakamura, T
Monteiro, MJ
Rizzardo, E
Sayama, S
Thang, SH
van Le, P
Zayas-Holdsworth, CI
Griffith University Author(s)
Year published
1998
Metadata
Show full item recordAbstract
Several techniques have been used to probe polymer end groups. The nitroxide radical trapping technique has been used (i) to show that initiator‐derived unsaturated end groups in polymethyl methacrylate can be minimized by using t‐hexyl peroxypivalate as the initiator (ii) to predict the end and penultimate groups in acrylonitrile/ethyl vinyl ether copolymer produced by t‐butoxyl initiation by analogy with the initiation mechanism (iii) to predict probable end groups in polyacrylonitrile and polystyrene produced by cyanoisopropyl initiation in the presence of adventitious oxygen. NMR techniques have been used to show that ...
View more >Several techniques have been used to probe polymer end groups. The nitroxide radical trapping technique has been used (i) to show that initiator‐derived unsaturated end groups in polymethyl methacrylate can be minimized by using t‐hexyl peroxypivalate as the initiator (ii) to predict the end and penultimate groups in acrylonitrile/ethyl vinyl ether copolymer produced by t‐butoxyl initiation by analogy with the initiation mechanism (iii) to predict probable end groups in polyacrylonitrile and polystyrene produced by cyanoisopropyl initiation in the presence of adventitious oxygen. NMR techniques have been used to show that the end groups of functionalized oligomers, made from styrene and methacrylonitrile by the addition‐fragmentation chain transfer technique with allylic sulphides, conform to the expected structures.
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View more >Several techniques have been used to probe polymer end groups. The nitroxide radical trapping technique has been used (i) to show that initiator‐derived unsaturated end groups in polymethyl methacrylate can be minimized by using t‐hexyl peroxypivalate as the initiator (ii) to predict the end and penultimate groups in acrylonitrile/ethyl vinyl ether copolymer produced by t‐butoxyl initiation by analogy with the initiation mechanism (iii) to predict probable end groups in polyacrylonitrile and polystyrene produced by cyanoisopropyl initiation in the presence of adventitious oxygen. NMR techniques have been used to show that the end groups of functionalized oligomers, made from styrene and methacrylonitrile by the addition‐fragmentation chain transfer technique with allylic sulphides, conform to the expected structures.
View less >
Journal Title
Polymers for Advanced Technologies
Volume
9
Issue
1
Subject
Macromolecular and materials chemistry
Materials engineering