通过反应挤出方法将端氨基聚氨酯(ATPU)接枝到聚丙烯(PP)分子链上,并用红外光谱对 AT PU g PP进行了表征。研究了ATPU分子量、配比、螺杆转速等对接枝率的影响,确定了合成高接枝率产物的优化工艺条件。将ATPU g PP再与通用PP共混挤出,...通过反应挤出方法将端氨基聚氨酯(ATPU)接枝到聚丙烯(PP)分子链上,并用红外光谱对 AT PU g PP进行了表征。研究了ATPU分子量、配比、螺杆转速等对接枝率的影响,确定了合成高接枝率产物的优化工艺条件。将ATPU g PP再与通用PP共混挤出,可得到功能化聚丙烯(FPP)。展开更多
The critical micelle concentration(CMC) value and surface charge of the amphiphilic graft copolymer PECA-g-PEG micelles(PECA:polyethyl cyanoacrylae, PEG:polyethylene glycol) are reported. CMC of the copolymers is dete...The critical micelle concentration(CMC) value and surface charge of the amphiphilic graft copolymer PECA-g-PEG micelles(PECA:polyethyl cyanoacrylae, PEG:polyethylene glycol) are reported. CMC of the copolymers is determined from the absorbance change of bromophenol blue solution as function of copolymer concentration, which is about 1×10 -6 mol/L. The critical coagulation concentration (cz c) of electrolytes with different valence(z) for the copolymer micelles are examined by visual method and compared with that obtained by experiential formula cz c∝z -6. The relation formula for different cations is deduced:cz c∝z -4, which indicates the electronegative character of the micelle surface.展开更多
涂料含带官能团(选自酯类、羟基和羧基)的脂环族烃聚合物。例如,一种涂料含40份丙烯酸-甲基丙烯酸环己酯丙烯酸乙酯一甲基丙烯酸一甲基丙烯酸聚乙二醇甲醚(NK Ester M 90G)-丙烯酸三异丙基甲硅烷酯接枝共聚物铜盐、氢化松香盐和8...涂料含带官能团(选自酯类、羟基和羧基)的脂环族烃聚合物。例如,一种涂料含40份丙烯酸-甲基丙烯酸环己酯丙烯酸乙酯一甲基丙烯酸一甲基丙烯酸聚乙二醇甲醚(NK Ester M 90G)-丙烯酸三异丙基甲硅烷酯接枝共聚物铜盐、氢化松香盐和8份含酯基的脂环族烃聚合物(Quintone1500),具有高的机械强度和好的耐裂纹和耐抛光性。展开更多
文摘The critical micelle concentration(CMC) value and surface charge of the amphiphilic graft copolymer PECA-g-PEG micelles(PECA:polyethyl cyanoacrylae, PEG:polyethylene glycol) are reported. CMC of the copolymers is determined from the absorbance change of bromophenol blue solution as function of copolymer concentration, which is about 1×10 -6 mol/L. The critical coagulation concentration (cz c) of electrolytes with different valence(z) for the copolymer micelles are examined by visual method and compared with that obtained by experiential formula cz c∝z -6. The relation formula for different cations is deduced:cz c∝z -4, which indicates the electronegative character of the micelle surface.
文摘涂料含带官能团(选自酯类、羟基和羧基)的脂环族烃聚合物。例如,一种涂料含40份丙烯酸-甲基丙烯酸环己酯丙烯酸乙酯一甲基丙烯酸一甲基丙烯酸聚乙二醇甲醚(NK Ester M 90G)-丙烯酸三异丙基甲硅烷酯接枝共聚物铜盐、氢化松香盐和8份含酯基的脂环族烃聚合物(Quintone1500),具有高的机械强度和好的耐裂纹和耐抛光性。