Naslov
Change of Molecular Weight Distribution of Statistical Poly(styrene-co-acrylonitriles) with Composition

Autori
Mencer, Helena Jasna ; Gomzi, Zoran ; Rogošić, Marko

Izvornik
Polymer Engineering and Science (0032-3888) 35 (1995), 17; 1348-1352

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

Ključne riječi
Molecular Weight Distribution; Statistical copolymers

Sažetak
Statistical poly(styrene-co-acrylonitriles), (SAN) copolymers with varying mole fractions of comonomer units have been synthesized in batch reactor. Intrinsic viscosity and gel permeation chromatography (GPC) pattern of model copolymer samples were the basic experimental results. Chromatographic patterns of SAN copolymer samples were converted into molecular weight distributions and afterwards fitted to the theoretical distribution functions. The correlation between the composition of obtained copolymers and the best fitted model distribution (Schulz's two parameters distribution in this case) was established. The treatment of data shows that parameter (alpha) is inversely proportional to the content of acrylonitrile units in the sample and indicates the present molecular weight interval. Parameter b shows the invariability of the molecular weight distribution shape.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA