Five narrow molecular weight distributed fractions of Phenolphthalein poly (aryl ether ketone) were studied in chloroform by static laser light scattering (LLS) and viscometry at 25°C. From static LLS, the weight-average molecular weights (Mw), z-average radii of gyration; <Rg2>z1/2 (or written as <Rs> and second virial coe1licients, A2 of the PEK-C fractions were determined. Our results showed that <Rg2>z1/2 = 3.50 x 10-2 Mw0.54. From viscometry, the reduced and inherent viscosities of all the fractions were measured and the corresponding intrinsic viscosities were determined. The intrinsic viscosities scaled with the molecular weights obtained through static LLS yielding a Mark-Houwink equation of [ h] = 4.42 x 10-2 Mw0.686.The exponent values indicate that PEK-C in CHCl3 at 25°C has a coil chain conformation.
MOHAMMAD SIDDIQ ,KHALID MAHMOOD ,BAKHTIAR MOHAMMAD ,MUSA KALEEM BALOCH ,MOHSIN NAWAZ ,CHI WU ,
You can use below filter to find your desired issue