Naslov
Copolymerization and Copolymers of 2, 4, 5-Tribromostyrene with Methyl Acrylate and Methyl Methacrylate

Autori
Janović, Zvonimir ; Tomašek, Ljubica

Izvornik
Journal of macromolecular science : pure and applied chemistry (1060-1325) A34 (1997), 12; 2471-2481

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Tribromostyrene; Methyl acrylate; Methyl methacrylate; Copolymerization; Thermal stability

Sažetak
2, 4, 5-Tribromostyrene (TBSt) was copolymerized with methyl acrylate (MA) or methyl methacrylate (MMA) in a toluene solution using 2, 2"-azobisisobutyronitrile as free radical initiator. The copolymerization reactivity ratios were found to be for the system TBSt/MA r_1=7.4+1.2 (TBSt) and r_2=0.1+1.4 (MA) and for the system TBSt/MMA r_1=1.8+0.2 (TBSt) and r_2= 0.1+0.2 (MMA). The e and Q values were also calculated. The initial rate of copolymerization, as well as molecular weight of the obtained copolymers for both system linearly increase as the contect of TBSt in the monomer mixture increases. Similar behavior has also been established for the course of the copolymerization reactions to high conversions. The resulting copolymers rapidly decompose at temperatures 20-800^oC above the decomposition of corresponding (metha)crylate hompolymers. However, the glass transition temperature increases markedly with increasing TBS content.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA