聚丙烯酸钠

Synthesis of super high molecular weight sodium polyacrylate by inverse suspension polymerization of acrylamide and sodium acrylate was studied.

以丙烯酸钠和丙烯酰胺为单体，采用反相悬浮聚合法制备了超高分子量的聚丙烯酸钠。

LIN Hailin,CUI Yingde,DU Lin,CHEN JianpingInstitute of Applied Chemistry,Zhongkai University of Agriculture and TechnologySuper water absorbent resins P,SA/NaAA,SA/NaAA/PVA and SA/NaAA/AM were synthesized from sodium alginate,acrylic acid,polyvinyl alcoholand acrylamide,with N,N–methylenebisacrylamide as crosslinking agent,(NH4)2S2O8 - NaHSO3 as initiator,by means of aqueous solution polymerization.

以醚化海藻酸钠、聚乙烯醇、丙烯酰胺、丙烯酸为单体，N， N–亚甲基双丙烯酰胺为交联剂，过硫酸铵-亚硫酸氢钠为引发剂，采用水溶液法制备聚丙烯酸钠p吸水树脂和海藻酸钠/丙烯酸钠、海藻酸钠/丙烯酸钠/聚乙烯醇（SA/NaAA/PVA）及海藻酸钠/丙烯酸钠/丙烯酰胺吸水性复合树脂。

With the acid and alkali titrate method,we got the mean molecular weight and discussed the monomer density,the initiator amount used, chain transfer agent factor as well as reaction temperature to molecular weight influence tendency and d.

聚丙烯酸钠在很多领域的广泛应用，我们采用水溶液聚合法中的中和法合成低分子量聚丙烯酸钠，用酸碱滴定的方法测得聚丙烯酸的平均分子量，并探讨了单体浓度、引发剂用量、链转移剂用量以及反应温度等因素对聚丙烯酸钠分子量的影响趋势和程度。

It is pointed out that the biodegradability of modified sodium polyacrylate can be improved by introducing vinyl alcohol to its molecular chain.

综述了无磷洗涤助剂的开发进展，并对 4A沸石、偏硅酸钠、聚丙烯酸钠、沸石P、顺丁烯二酸酐丙烯酸共聚物钠盐、层状结晶二硅酸钠等助剂的性能作了评述；指出在改性聚丙烯酸钠分子链中引入乙烯醇能改善其生物降解

Water,butylene glycol,cyclomethicone,VP/VA copolymer,glyceryl stearate,glycerin,ppg-15 stearyl ether,titanium dioxide,propylene glycol,cetyl alcohol,citrus aurantium dulcisfruit extract,saccharide isomerate,biosaccharide gum-1,ethoxydiglycol,peg-40 stearate,glycyrrhiza glabraroot extract,morus bombycis root extract,potassium cetyl phosphate,phenoxyethanol,c12-20 acid peg-8 ester,triethanolamine,prunus amygdalus dulcis oil,carbomer,caprylyl glycol,caffeine,disodium edta,methylparaben,chondrus crispus,butylparaben,iris germanica root extract,pentadecalactone,sodium polyacrylate,ethylparaben,sodium hyaluronate,peg-8,propylparaben,citric acid,chlorhexidine digluconate,tocopherol,ascorbyl palmitate,ascorbic acid

水，丁烯二醇，环甲硅脂，VP/VA共聚物，甘油基硬脂酸，甘油，ppg-15 stearyl ether，二氧化钛，丙二醇，十六烷基醇，橙子萃取物，天然异构寡糖， biosaccharde gum-1，乙基氧基乙二醇，聚乙二醇- 40硬脂酸，甘草根提取物，桑白皮根萃取，钾十六烷基磷酸盐，苯氧乙醇，c12-20 acid peg-8 ester，三乙醇胺，甜杏仁油，高分子胶，辛乙二醇，咖啡因，乙二胺四乙酸二钠，对羟基苯甲酸甲酯，卡拉胶，对羟基苯甲酸丁酯，鸢尾花根萃取， pentadecalactone ，聚丙烯酸钠，羟苯乙酯，透明质酸钠，聚乙二醇- 8，羟苯丙酯，柠檬酸，洗必泰葡萄糖酸盐，维生素E，维生素C棕榈酸酯，抗坏血酸

Silver nanoparticles with average particle size ranging from 2 to 131nm were manipulatively synthesized starting from silver nitrate using 10 kinds of different functional group-containing organic modifiers, such as polyvinylpyrrolidone, tween-80, sodium dodecyl sulfate, sodium polyacrylate, polyethylene glycol, D-sorbitol, sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, polyvinyl alcohol, cetyltrimethylammonium bromide, at room temperature.

摘 要：选择10种含有不同官能团的有机物为表面修饰剂，如聚乙烯吡咯烷酮、吐温-80、十二烷基硫酸钠、聚丙烯酸钠、聚乙二醇、山梨醇、十二烷基磺酸钠、聚乙烯醇、十二烷基苯磺酸钠和十六烷基三甲基溴化铵等，在室温下进行了平均粒径在2～131nm范围内纳米银颗粒的控制合成研究。

The results showed that the low-molecular weight sodium polyacrylate from 2 000 to 4 000 were obtained when reaction temperature was 70 ℃,acrylic acid mass fraction was 20 %～30 %,the mass ratio of potassium persulphate to sodium hydrogen sulfite was 10∶1～14∶1,and reaction...

对合成的聚丙烯酸钠在陶瓷铁粉上进行应用试验，当聚丙烯酸钠加入量为0.3%~0.5%时，所得浆料粘度较小，有良好的分散效果。

The results from the experiment are: the amount of all micro-powders that grain sizes are less 0.044 mm should be less than 35% in weight, and the value of coarse q and attenuate q should be respectively 0.23 and 0.32, and the additive amount of active a-alumina and calcium alumina cement should be respectively 7% and 4% in weight, meanwhile, the best dispersant is PMAA-NH4 in the non-microsilica system; while the value of two q should be respectively 0.21 and 0.29, the amount of active a-alumina, microsilica and calcium alumina cement should be respectively 6%, 2% and 4% in weight, the best dispersants are sodium hexamer taphosphate and Na2P3Oio in the microsilica system.

依照上述实验方法得出刚玉自流浇注料所必备的条件：刚玉自流浇注料中的细粉(-0.044mm)总量应小于35％；在无硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.23和0.32，氧化铝微粉、水泥的最佳加入量是7％、4％，且所使用的分散剂为改性聚丙烯酸钠最好，而在含硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.21和0.29，氧化铝微粉、硅微粉和水泥的最佳加入量为6％、2％和4％，最好合用三聚磷酸钠和六偏磷酸钠作为分散剂。

The rate of wetting front advance and infiltration rate under certain ponded infiltration was significantly reduced by Sodium Polyacrylate , and as a result effectively reduced water in a sandy soil leaking to a deeper layer under the plough layer.

砂土的饱和导水率随着高分子化合物聚丙烯酸钠用量增加而降低，在恒定水头入渗条件下，聚丙烯酸钠降低了水分向深层运移的速度，同时降低了砂土的入渗速率，可以有效降低砂土水分的深层渗漏。

The time from saturated soil moisture content to wilting percentage of Aeolian sandy soil, Loessial soil and Lou soil was extended by 244.72%,251.11% and 36.31% respectively when Sodium Polyacrylate was applied at the suggested dosage.

风砂土、黄绵土与塿土的蒸发强度随着高分子化合物聚丙烯酸钠用量增加而降低，聚丙烯酸钠用量为0.5%时，砂土、黄绵土与塿土10天累积蒸发量分别较对照降低了59.89%、48.92%与55.81%；综合考虑对土壤蓄水与蒸发能力的影响，聚丙烯酸钠用量为风砂土、黄绵土应控制在0.08%～0.2%，塿土中用量必须严格控制在0.2%左右；在上述用量条件下，风砂土、黄绵土、塿土从饱和含水量蒸发失水至凋萎含水量的时间分别被延长了244.72%、251.11%与36.31%左右。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。