Surface properties molecular weight dependence

Tanaka K, Taura A, Ge SR, Takahara A, Kajiyama T. Molecular weight dependence of surface dynamic viscoelastic properties for the monodisperse polystyrene film. Macromolecules 1996 29 3040-3042. 

In this work we approach the statistics of adsorption of both end-methylated and end-hydroxylated PDMS chains by an independent way. We use the magnetic relaxation properties of protons attached to the polymer chain to estimate the relative number of monomeric units which are fixed on the silica surface. We show that the molecular weight dependence of this quantity is in accordance with the gaussian statistics of PDMS chains adsorption. 

Even if a same azide is used as the sensitizer, such properties of the photoresist as photosensitivity, photocurability and adhesion to base surfaces differ depending on the property of the base polymer. That is, degree of cyclization, content of the unsaturated groups and molecular weight of the polymer affect the photoresist properties mentioned above. H.L.Hunter et al. have discussed the dependence of the sensitivity of polybutadiene photoresist on the polymer structure, and have concluded that a higher sensitivity was obtained when 1,2- and 3, -isomers were used( 7.) ... 

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