The effects of type and amount of chain extenders, hydroxyl terminated polybutadiene(HTPB) of different molecular weights and filler on the hydrolytic stability of polybutadiene based polyurethane elastomer were studi...The effects of type and amount of chain extenders, hydroxyl terminated polybutadiene(HTPB) of different molecular weights and filler on the hydrolytic stability of polybutadiene based polyurethane elastomer were studied. The results showed that the stability of HTPB PU was improved by addition of chain extenders, especially butanediol and 1,6 hexanediol. The more the amount of the extender, and the lower the molecular weight of HTPB, the higher the hydrolytic stability. The stability of HTPB PU could be improved also by addition of inorganic fillers.展开更多
Polyaspartic acid(PASP) was prepared by hydrolysis of the polysuccinimide, which was mechanochemically synthesized from maleic anhydride and ammonium hydroxide in nitrogen atmosphere protection. The scale and corrosio...Polyaspartic acid(PASP) was prepared by hydrolysis of the polysuccinimide, which was mechanochemically synthesized from maleic anhydride and ammonium hydroxide in nitrogen atmosphere protection. The scale and corrosion inhibitions of PASP was evaluated and compared with 2-phosphonobutane-1,2,4-tricar- boxylic acid(PBTCA), 1-hydroxyethylidene-1,1-diphosphonic acid(HEDP) and hydrolyzed polymaleic anhydride(HPMA). The results revealed that the inhibition of the PASP is close to that of PBTCA and HEDP, but much better than that of HPMA.展开更多
A novel sulfonated polyimide containing triphenyl methane as the polymer electrolytes for fuel cell appliaction was successfully synthesized.The sulfonic acid function was only attached at the para positions on the pe...A novel sulfonated polyimide containing triphenyl methane as the polymer electrolytes for fuel cell appliaction was successfully synthesized.The sulfonic acid function was only attached at the para positions on the pendant phenyl rings due to the novel sulfonated diamine structures designed.The sulfonated polymers are very soluble in common organic solvents,such as dimethyl sulfoxide,N,N’-dimethylacetamide,and can be readily cast into tough and smooth films from solutions.The membranes show excellent hydrolytic and oxidative stabilities and can be potentially used as the proton-exchange membranes for fuel-cells.展开更多
文摘The effects of type and amount of chain extenders, hydroxyl terminated polybutadiene(HTPB) of different molecular weights and filler on the hydrolytic stability of polybutadiene based polyurethane elastomer were studied. The results showed that the stability of HTPB PU was improved by addition of chain extenders, especially butanediol and 1,6 hexanediol. The more the amount of the extender, and the lower the molecular weight of HTPB, the higher the hydrolytic stability. The stability of HTPB PU could be improved also by addition of inorganic fillers.
文摘Polyaspartic acid(PASP) was prepared by hydrolysis of the polysuccinimide, which was mechanochemically synthesized from maleic anhydride and ammonium hydroxide in nitrogen atmosphere protection. The scale and corrosion inhibitions of PASP was evaluated and compared with 2-phosphonobutane-1,2,4-tricar- boxylic acid(PBTCA), 1-hydroxyethylidene-1,1-diphosphonic acid(HEDP) and hydrolyzed polymaleic anhydride(HPMA). The results revealed that the inhibition of the PASP is close to that of PBTCA and HEDP, but much better than that of HPMA.
文摘A novel sulfonated polyimide containing triphenyl methane as the polymer electrolytes for fuel cell appliaction was successfully synthesized.The sulfonic acid function was only attached at the para positions on the pendant phenyl rings due to the novel sulfonated diamine structures designed.The sulfonated polymers are very soluble in common organic solvents,such as dimethyl sulfoxide,N,N’-dimethylacetamide,and can be readily cast into tough and smooth films from solutions.The membranes show excellent hydrolytic and oxidative stabilities and can be potentially used as the proton-exchange membranes for fuel-cells.
