Abstract
Using the acrylamide (AA) and methyl methacrylate (MMA) grafted pulps of various degree of grafting, two kinds of paper were made as follows :
(a) One was made from the grafted pulp only.
(b) The other was made from the mixed pulp consisted of higher grafted and original pulp.
Some physical properties of these papers were compared.
The papers made from original pulp were saturated with various concentration of polymer solution and their properties were also tested.
1) Thickness of the paper made from the grafted pulp increased with increasing degree of grafting and a linear relationship was found between degree of MMA graft and thickness.
2) Both tensile strength and fold endurance of the paper made from AA grafted pulp increased with increasing degree of grafting, while those of the paper made from MMA grafted pulp decreased.
3) Tear strength of the paper made from AA grafted pulp decreased remarkably with increasing degree of grafting, but that of MMA grafted pulp showed a maximum strength at about 10% grafting.
The differences between (a) and (b) in tensile strength, fold endurance, and dimensional stability were discussed.
The fact that the papers show the different properties was considered to have the relation to the hydrophilic or hydrophobic nature of grafted pulp.
The properties of papers made from methyl acrylate (MA) and vinyl acetate (VAc) grafted pulp were also determined, the tensile strength decreased with increasing degree of grafting and the freeness of these hydrophobic pulps were higher than that of the ungrafted pulp.
