It was studied from microscopic (molecular) stanspoint of paper.
1. It is deduced, that the part which corresponds to rheological properties of paper is not main valency bond in crystallite or micelle, but hydrogen bond between amorphous part. By this consideration we can expect that the decrease of paper strength at high humidity and increase of tensile strength during the beating.
2. From the microscopic standpoint, assuming the strain of paper under the stress is the sum of strain of elastic part and slip part between atoms, stress-strain relation was represented.
This relation agrees with equation from mechanical Maxwell model in previous report and introducing this slip part, it is supposed easily that paper makes continuous breaking.
3. This equation also can be derived directly from Morse equation which represent distance∼energy curve between atoms, and apparent Youngs modulus which is represented by substance constant from microscopic standpoint, 1010dyne/cm2 was obtained.
4. From these results, it was deduced the number of hydrogen bond in one cubic centimeter at paper corresponding to viscoelastic properties of paper, is 1021/cm3 as rough order and O-H-O bond energy is 10-13erg or several kilo calories per mol. which agree with result relating hydrogen bond.