Surface sizing is an effective way to increase paper’s water-resistance and printability.The purpose of this study was to study synthesis process to develop an efficient cationic styrene-acrylic acid ester emulsion(S...Surface sizing is an effective way to increase paper’s water-resistance and printability.The purpose of this study was to study synthesis process to develop an efficient cationic styrene-acrylic acid ester emulsion(SAE)for the surface sizing of paper.Dimethylaminoethyl methacrylate methyl chloride(DMC)was used as the cationic monomer,and cationic starch or native starch was used as the emulsion stabilizer to copolymerize with styrene and butyl acrylate.The results indicated that the SAE synthesized with cationic starch and DMC had a high cationic charge density and a high DMC conversion rate.Paper sized with the cationic SAE had higher surface strength and lower Cobb value than the paper sized with other surface sizing agents such as,anionic SAE,and cationic or oxidized starch.Scanning electron micrographs revealed that the paper sized with a combination of oxidized starch and cationic SAE had smoother surface morphology when compared to the paper sized with oxidized starch alone,or with oxidized starch and anionic SAE.展开更多
通过Gilch反应合成了结构新颖、含四官能团单元的超支化PPV聚合物P1～P3.聚合物的结构得到1 H NMR和元素分析结果的确证.通过热重分析(TGA)得知,该类非结晶相的聚合物热分解温度较高,分别为371.7、386.6和391.8℃.所合成的聚合物固态时...通过Gilch反应合成了结构新颖、含四官能团单元的超支化PPV聚合物P1～P3.聚合物的结构得到1 H NMR和元素分析结果的确证.通过热重分析(TGA)得知,该类非结晶相的聚合物热分解温度较高,分别为371.7、386.6和391.8℃.所合成的聚合物固态时的紫外吸收及荧光发射相对于液态的紫外吸收及荧光发射,波长有明显的红移现象,并且该聚合物具有宽吸收、窄发射的特征,在电致发光器件和聚合物太阳能电池器件中将有潜在的应用前景.展开更多
基金Financial support for this work was provided by the National Natural Science Foundation of China(No.31370583)Brand Specialty Construction First Stage Projects of Jiangsu Universities 2015.The article was partly presented at the 4^(th) International Conference on Pulping,Papermaking and Biotechnology on Nov.7-9,2012 at Nanjing China.The organizer agreed for the contents to be submitted to Journal of Bioresources and Bioproducts.
文摘Surface sizing is an effective way to increase paper’s water-resistance and printability.The purpose of this study was to study synthesis process to develop an efficient cationic styrene-acrylic acid ester emulsion(SAE)for the surface sizing of paper.Dimethylaminoethyl methacrylate methyl chloride(DMC)was used as the cationic monomer,and cationic starch or native starch was used as the emulsion stabilizer to copolymerize with styrene and butyl acrylate.The results indicated that the SAE synthesized with cationic starch and DMC had a high cationic charge density and a high DMC conversion rate.Paper sized with the cationic SAE had higher surface strength and lower Cobb value than the paper sized with other surface sizing agents such as,anionic SAE,and cationic or oxidized starch.Scanning electron micrographs revealed that the paper sized with a combination of oxidized starch and cationic SAE had smoother surface morphology when compared to the paper sized with oxidized starch alone,or with oxidized starch and anionic SAE.
文摘通过Gilch反应合成了结构新颖、含四官能团单元的超支化PPV聚合物P1～P3.聚合物的结构得到1 H NMR和元素分析结果的确证.通过热重分析(TGA)得知,该类非结晶相的聚合物热分解温度较高,分别为371.7、386.6和391.8℃.所合成的聚合物固态时的紫外吸收及荧光发射相对于液态的紫外吸收及荧光发射,波长有明显的红移现象,并且该聚合物具有宽吸收、窄发射的特征,在电致发光器件和聚合物太阳能电池器件中将有潜在的应用前景.
