Reference : Anionically prepared poly(epsilon-caprolactam-co-epsilon-valerolactone) copolymers: ther...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/87322
Anionically prepared poly(epsilon-caprolactam-co-epsilon-valerolactone) copolymers: thermal and mechanical properties
English
Toncheva, Natalia [University of Chemical Technology and Metallurgy, Sofia, Bulgaria and University of Liège (ULg) > Department of Plastics Technology (Sofia) and Department of Chemistry (Liège) > Center for Education and Research on Macromolecules (CERM, Liège) > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Mateva, Rosa [University of Chemical Technology and Metallurgy, Sofia, Bulgaria > Department of Plastics Technology > > >]
Feb-2011
European Polymer Journal
Elsevier Science
47
2
238-247
Yes (verified by ORBi)
International
0014-3057
[en] ring-opening polymerization (ROP) ; lactone ; lactame
[en] Thermal and representative physico-mechanical properties of newly prepared poly[(ε-caprolactam)-co-(ε-caprolactone)] and poly[(ε-caprolactam)-co-(δ-valerolactone)] copolymers were studied. The copolymers were synthesized by anionic polymerization of ε-caprolactam activated by isocyanate end-capped oligomeric aliphatic polyesters designated as the macroactivators (MAs). Type, concentration and molecular weight of the MAs were varied, which resulted in copolymers with different structure and properties. The impact of the new MAs used in this study on the glass transition temperature and the melting temperature of poly-ε-caprolactam was investigated by DSC. DMTA was used to analyze the effect of copolymerization on the storage modulus (E′) and tan δ of poly-ε-caprolactam. Conventional and high-resolution TGA data revealed that all the synthesized polyesteramides possess good thermal stability. Mechanical properties were studied by notched impact and tensile testing. According to the experimental data the impact toughness increase with the MA content, being six time higher compared to the poly(ε-caprolactam) in the best situation. Water absorption was also considered in relation to the composition of the copolymers.
Center for Education and Research on Macromolecules (CERM)
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers
http://hdl.handle.net/2268/87322
10.1016/j.eurpolymj.2010.11.015
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TWW-51K995W-1-13&_cdi=5573&_user=532038&_pii=S001430571000460X&_origin=browse&_zone=rslt_list_item&_coverDate=02%2F28%2F2011&_sk=999529997&wchp=dGLbVtz-zSkzS&md5=b210d6f4e7cc367a08f1b19e738b5bd0&ie=/sdarticle.pdf

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