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Radical copolymeriz...
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Atlas, Salima
(författare)
Radical copolymerization of acrylonitrile with 2,2,2-trifluoroethyl acrylate for dielectric materials : Structure and characterization
- Artikel/kapitelEngelska2013
Förlag, utgivningsår, omfång ...
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2013-06-11
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Wiley,2013
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-127736
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127736URI
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https://doi.org/10.1002/pola.26783DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:for swepub-publicationtype
Anmärkningar
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QC 20130909
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Radical copolymerization based on acrylonitrile (AN) and 2,2,2-Trifluoroethyl acrylate (ATRIF) initited by AIBN was investigated in acetonitrile solution. The resulting poly(AN-co-ATRIF) copolymers were characterized by 1 H, 13 C, and 19 F NMR and IR spectroscopy, and size exclusion chromatography (SEC). Their compositions were assessed by 1 H NMR. The kinetics of radical copolymerization of AN with ATRIF was investigated from sereval experiments achieved at 70 degrees C from initial [AN](0)/[ATRIF](0) molar ratios ranging between 20/80 and 80/20 and was enabled to determine the reactivity ratios of both comonomers. From the monomer-polymer copolymerization curve, the Fineman-Ross and Kelen-Tudos laws enabled to assess the reactivity ratios (r(AN) = r(1) = 1.25 +/- 0.04 and r(ATRIF) = r(2) = 0.93 +/- 0.05 at 70 degrees C) while the revised patterns scheme led to r(12) = r(AN) = 1.03, and r(21) = r(ATRIF) = 0.78 at 70 degrees C. In all cases, rAN x rATRIF product was close to unity, which indicates that poly(AN-co-ATRIF) copolymers exhibit a random structure. This was also confirmed by the Igarashi's and Pyun's laws which revealed the presence of AN-ATRIF, AN-AN, and ATRIF-ATRIF dyads. The Q and e values for ATRIF were also assessed (Q(2) = 0.62 and e(2) = 0.93). The glass transition temperature values, Tg, of these copolymers increased from 17 to 61 degrees C as the molar percentage of ATRIF decreased from 77 to 16% in the copolymer. Thermogravimetry analysis of poly(AN-co-ATRIF) copolymers showed a good thermal stability compared to that of poly(ATRIF) homopolymer due to incorporation of AN comonomer.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Raihane, Mustapha
(författare)
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Hult, AndersKTH,Ytbehandlingsteknik(Swepub:kth)u10c9v2x
(författare)
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Malkoch, MichaelKTH,Ytbehandlingsteknik(Swepub:kth)u18z6ljf
(författare)
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Lahcini, Mohammed
(författare)
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Ameduri, Bruno
(författare)
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KTHYtbehandlingsteknik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Polymer Science Part A: Wiley51:18, s. 3856-38660887-624X1099-0518
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