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ID 115354
Author
Okumura, Yuya Tokushima University
Seno, Makiko Tokushima University
Keywords
Hydrogen bond
N-vinylacetamide
Stereospecific radical polymerization
Syndiotactic
Heterotactic
Isotactic
Content Type
Journal Article
Description
Radical polymerization of N-vinylacetamide (NVA) in toluene at low temperatures was investigated. It was found that the addition of Lewis bases or alcohol compounds significantly influenced stereospecificity in NVA polymerization. For example, syndiotacticity increased from 25% to 34% by adding tri-n-butyl phosphate at –40°C. Mono-alcohol compounds increased heterotacticity and heterotactic poly(NVA) with mr triad content of 58% was obtained at –40°C in the presence of 1,1,1,3,3,3-hexafluoro-2-propanol. Furthermore, isotactic poly(NVA) with mm triad = 49% was obtained at –60°C in the presence of diethyl L-tartrate. The NMR analysis demonstrated that complex formation between NVA monomer and the added agents, through hydrogen-bonding interaction, played an important role to induce the stereospecificity.
Journal Title
European Polymer Journal
ISSN
00143057
NCID
AA00639767
AA11527404
Publisher
Elsevier
Volume
42
Issue
9
Start Page
2114
End Page
2124
Published Date
2006-05-12
Rights
© 2006. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Author
departments
Science and Technology