Solution properties of poly (dimethylsiloxanes) in toluene / Maimunah Sokro and Arba'at Hassan

Sokro, Maimunah and Hassan, Arba'at (2004) Solution properties of poly (dimethylsiloxanes) in toluene / Maimunah Sokro and Arba'at Hassan. In: STSS 2004 : Sains Teknologi Jilid1, 31 Mei – 1 Jun 2004, Hotel Vistana, Kuantan, Pahang.


A commercial sample of liquid poly (dimethylsiloxanes) [PDMS] was fractionated, yielding five fractions of Mn ranging from 480 to 1130 g/mol and of Mw ranging from 500 to 1175 g/mol. The fractions were dissolved in toluene and characterized by vapour pressure osmometry, viscometry, differential refractometer and light scattering. Light scattering and vapour pressure measurements reveal that the fractions are monodisperse. The viscosity measurements along with vapour pressure osmometer and light scattering give the Mark-Houwink constants in toluene at 25°C as v = 1.01 and K' = 1.35 X 10-3. Others parameters, e.g. second virial coefficient, radius of gyration, unperturbed dimension, density, refractive index, coefficient of isothermal compressibility, light scattering depolarization ratio and Rayleigh ratio have also been evaluated at different temperatures.


Item Type: Conference or Workshop Item (Paper)
Email / ID Num.
Sokro, Maimunah
Hassan, Arba'at
Subjects: Q Science > QC Physics > Heat > Temperature measurements
Q Science > QD Chemistry > Aromatic compounds
Q Science > QD Chemistry > Organic chemistry > Polymers. Macromolecules
Divisions: Universiti Teknologi MARA, Pahang > Jengka Campus
Journal or Publication Title: Sains Teknologi Jilid1
Event Title: STSS 2004 : Sains Teknologi Jilid1
Event Dates: 31 Mei – 1 Jun 2004
Page Range: pp. 20-26
Keywords: Poly (dimethylsilohexal1es) solution, intrinsic viscosity, Mark-Houwink constants, second virial coefficient
Date: 2004
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