Abstract
Graft copolymerization of N-acryloyl-β-alanine and N-acryloyl-ε-amino-n-caproic acid onto natural rubber was especially investigated using radical initiators under various conditions. Several physic chemical properties of graft copolymers obtained were also examined.
Graft copolymerization of N-acryloyl-β-alanine: 1) As a polymerization solventamixture of toluene and dioxane with the composition of 2:1 by volume was suitable; 2) BPO and AIBN were effective initiators for graft copolymerization; 3) the higher the concentration of monomer, the better graft results were obtained; 4) the appropriate polymerization temperature was 80 to 100°C; 5) as the degree of grafting increased, the polymer obtained became more easily swollen in water and ethanol but hardly swollen in benzene and carbon tetrachloride.
Graft copolymerization of N-acryloyl-ε-amino-n-caproic acid: 1) Toluene was suitable as a polymerization solvent and BPO was effective as an initiator; 2) the use of 2mol monomer against 1mol rubber produced good results of grafting; 3) the appropriate polymerization temperature was 80°C; 4) the graft copolymer was fairly soluble in benzene or carbon tetrachloride, and the peak of degree of swelling lay at the degree of grafting 80%.
In addition, graft copolymerization of N-acryloyl-γ-amino-n-butyric acid and N-acryloyl-ω-amino acid ethyl esters onto natural rubber was investigated.
