The adsorption isotherms of three kinds of poly- (methylmethacrylate) (PMMA) which differed in molecular weight on TiO₂ (rutile) in benzene solutions were made. The relation between relative viscosity of rutile suspension dispersed in benzene solutions of PMMA and the calculated particle concentration was obtained. The relation was used to calculate the thickness of the adsorbed layer of PMMA by comparison with the relation between relative viscosity and particle concentration for rutile suspension in benzene solutions of stearic acid which had previously been measured as a calibration curve. The surface concentration was also calculated.
The thickness of the adsorbed layer increased and the surface concentration decreased with the increase of molecular weight of PMMA. The mean radius of suspended rutile particle was measured in the use of the Wiegner tube. It decreased with the increase of molecular weight of PMMA.

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Adsorption phenomena of polyethyleneimine onto cellulose in water-organic solvent system was investigated. As a result, minimum adsorption was observed in case of 1 : 1 volume ratio of binary system, while maximum adsorption was in water or organic solvent alone.
It has been demonstrated in the series of this study that both in ethyl alcohol and methyl alcohol the higher retention was observed in comparison with aqueous system but the lowest in the binary system.
The adsorption step was decisive to the PEI retention, but the wash condition did not show much influence on the PEI retention. From the result of swelling value of cellulose, it was recognized that the retention of polymer did not have direct correlation to swelling. The measurement of viscocity, however, showed the strong correlation to the retention. Therefore, from these results, it was pointed out that the adsorption phenomena of polyelectrolyte to porous material like cellulosic fiber in water-organic solvent system also could be well interpreted by using so called “Jack in the box effect”. (1, 2)

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The development of polymer architecture was briefly considered. The architecture was classified from the individual standpoints of design, structure or aesthetics. It has been pointed out that some of them were still missed without synthesis and study. Our attention was thus directed to synthesize and study some of them ;
1. Dumb-bell type polymers were synthesized from adducting bulky molecules to polypropylene diamine and also adducting polyethyleneimine to polyethylene glycol. The adsorption onto cellulose and the washability were studied. Dumb-bell type polymers showed more resistance to washing than linear polymer. This could be due to molecular entanglement between glucose chain of microfibril and the polymer.
2. Cage type polymer was synthesized from polymerizing acrylic acid on surface of macromolecules having three dimensional network such as polyethyleneimine. The polymer dissolved in water medium on less than pH 4 or higher than pH 10, but was insoluble in water on pH 4-10 and organic solvent in the range of study.

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