【摘要】 以己二酸、二乙烯三胺、尿素和环氧氯丙烷为原料,用熔融法合成出季铵烷基阳离子型聚酰胺。研究了反应温度、反应时间对产物酸值、胺值和阳离子度的影响。聚酰胺预聚体在170℃反应150 m in,所得产物的酸值为37.2%;脱氨化反应在125℃时反应8 h所得产物的胺值为32.3%;交联反应在70℃时反应70 m in所得产物的阳离子度为50.8%。测定了产品表观黏度为900~1 500 mPa.s,pH=6~8,w(固体分)=65%±1%,用凝固点降低法测得聚合物的数均相对分子质量为1.55×104,并对聚合产物结构进行了红外和核磁表征。实验产物较市售产品固含量与表观黏度都有所增加,并且完全溶于水。更多还原

【Abstract】 Cationic polyamide with quaternary ammonium group was synthesized by melting process employing adipic acid,diethylenetriamine,epichlorohydrin and urea as staring materials.The amidation reaction was carried out at 170 ℃ for 150 min to give the prepolymer of polyamide with acid number of 37.2%.Deamination reaction of the prepolymer with urea at 125 ℃ for 8 h gave a product with amic number of 32.3%.Finally the target product with cationic degree of 50.8% was produced by the crosslinking reaction at 70 ℃ for 70 min.The apparent viscosity of the product reached 800～(1 500) mPa·s,its pH value was 5～7,and the solid content of the product was 66%±1%.The number average relative molecular mass of the product was 1.55×10~4 by freezing-point depression.Structure of the product was characterized by IR and HNMR spectra.Compared with the commercial product,this product has improvement in solid content and apparent viscosity.更多还原