丙烯酰胺与二(烯丙基)十二胺在羧甲基纤维素上的接枝共聚物合成与表征

SYNTHESIS AND CHARACTERIZATION OF THE GRAFT COPOLYMERS OF CARBOXYMETHYLCELLULOSE WITH ACRYLAMIDE AND DIALLYLLAURYLAMINE

以十二胺与 3 氯丙烯的反应物二 (烯丙基 )十二胺 (DALA)、丙烯酰胺 (AM)和羧甲基纤维素 (CMC)为原料 ,合成了疏水化水溶性两性纤维素接枝共聚物 (CGAL) .利用FTIR、1 H NMR、MS和元素分析 (EA)等方法确证了DALA的结构 .考察了CMC的取代度与浓度 ,AM、DALA与引发剂浓度 ,温度及pH等因素对接枝共聚的影响 .通过FTIR对CGAL进行了分析 .借助比色滴定、EA和GPC等手段测定了CGAL的组成与分子量 .TG分析和粘度法研究了CGAL及其溶液的热稳定性 .

A novel hydrophobic comonomer diallyllaurylamine (DALA) has been prepared by tertiary amination of laurylamine and allylchloride in THF, and a series of the hydrophobically-modified amphoteric cellulosic graft copolymers(CGAL) of carboxymethylcellulose (CMC) with acrylamide (AM) and DALA have been synthesized employing potassium persulfate and dimethylaminoethyl 2-methacrylate as initiators in the mixed solvent of distilled water and DMF for the first time. DALA was characterized by means of FHR,H-1-NMR, MS and elemental analysis. The graft copolymerizations were investigated as a function of degree of substitution and concentration of CMC, concentration of AM, DALA and initiators, temperature and pH. CGAL was analyzed through FTIR. The composition and molecular weight of CGAL were determined making use of colorimetric titration, elemental analysis and gel permeation chromatography. Thermostability of CGAL and its aqueous solution was studied by thermogravimetry and viscometry. It has been shown that CGAL is biodegradable.