Pregled bibliografske jedinice broj: 62764
Copolymerization and copolymers of styrene with dodecyl methacrylate and octadecyl methacrylate
Copolymerization and copolymers of styrene with dodecyl methacrylate and octadecyl methacrylate // 14th Scientific Conference, Modification of Polymers / Ryszard Sikorski (ur.).
Wrocław: Prace Naukowe Politechniki Wroclawskiej, 1999. str. 261-264 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
Copolymerization and copolymers of styrene with dodecyl methacrylate and octadecyl methacrylate
(Copolymerization and copolymers od styrene with dodecyl methacrylate and octadecyl methacrylate)
Autori
Janović, Zvonimir ; Vidović, Elvira ; Sarić, Karla
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
14th Scientific Conference, Modification of Polymers
/ Ryszard Sikorski - Wrocław : Prace Naukowe Politechniki Wroclawskiej, 1999, 261-264
Skup
14th Scientific Conference, Modification of polymers
Mjesto i datum
Kudowa-Zdrój, Poljska, 26.09.1999. - 30.09.1999
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
styrene; dodecyl methacrylate; octadecyl methacylate; copolymerization; copolymers; viscosity improvers
(styrene; dodecyl methacrylate; octadecyl methacrylate; copolymerization; copolymers; viscosity improvers)
Sažetak
Styrene (St) was copolymerized with dodecyl methacrylate (DDMA) or octadecyl methacrylate (ODMA) in toluene using AIBN as free radical iinitiator over a wide composition and conversion ranges. The copolymer composition was determined from H-NMP spectra. The copolymerization reactivity ratios were determined. The Q and E values were also calculated. The initial polymerization rate, Rp, was found to be in an order ODMA > DDMA >> St and for both copolymerization system sharply decreases as the content of st in the monomer mixture increases. Similar behaviour has also been established for the molecular weights and intrinsic viscosity as their values significantly decrease with increasing the St fraction in copolymer. the polymers viscosity in toluene solution established at 30 to 90 C, slightly increases with the temperature for the poly(alkyl methacrylate) and reach the local maximum value at higher temperature shows a constant values for the polystyrene whereas the copolymers fall intermediate between those of homopolymers. Also the copolymers show an increase of thermal stability with increasing St content.
Izvorni jezik
Engleski
Znanstvena područja
Kemijsko inženjerstvo
