聚丙烯酸钠

The effects of reaction time, temperature, alkalic degree and the feed ratio on the hydrolysis reaction were investigated by means of the orthogonal design method. And the optimum operating conditions were got. Polyacrylate sodium was prepared under the optimum conditions.

利用正交设计，讨论了反应时间、温度、碱浓度、投料比等因素对水解反应的影响，获得了优化的水解反应条件，并在最优化的条件下制得聚丙烯酸钠。

There were crystallizable water and non-crystallizable water in polyacrylate hydrogel; the content of the non-crystallizable water was 2.13 g/g dry resin, much higher than that in non-ionic hydrogels.

聚丙烯酸钠水凝胶中的水有相变水和非冻结水两种存在形式，其中非冻结水含量为2.13g水/g绝干树脂，该数值大大高于非离子型水凝胶。

The low molecular weight sodium polyacrylate compounded with inorganic substances(sodium carbonate and sodium silicate)as a new type deflocculant of ceramic was studied in this paper.

研制出了一种低分子量聚丙烯酸钠与无机物复合的新型陶瓷减水剂。

Sodium polyacrylale ; Composite deflocculant ; The water reducing rate

聚丙烯酸钠；陶瓷复合减水剂；减水率

The optimum reaction conditions were obtained by orthogonal experiments. When the mass ratio of sodium polyacrylate to inorganic substances is 1:1.5:1.5,and the dosage was 0.3%,it got the best water reduc- ing rate 58.75 %.Experimental results showed that the composite deflocculant had good water reducing property in the ceram...

采用正交实验，确定了低分子量聚丙烯酸钠的最佳制备条件，并将其与无机物以不同比例复合，配比为1：1.5：1.5，添加量为0.3%时减水性能最佳，减水率达到58.75%，是一种很好的减水剂。

Keywords ceramic;sodium polyacrylate;deflocculant;grind additive;reinforcing agent

陶瓷； 聚丙烯酸钠；减水剂；助磨剂；增强剂

PAAS was selected as dispersant to evaluate the dispersion stabilization of SiO2 nanoparticles by a diffraction-based laser granulometric analyzer and identify the state of adsorption of the dispersant on the surface of nanoparticles by an IR spectrometer.

选择了聚丙烯酸钠作为分散剂，并通过激光粒度分析仪对纳米颗粒的分散稳定性进行评价，通过红外光谱仪对分散剂在颗粒表面的吸附状态进行识别。

DSC determination of PSA hydrogel revealed that content of the noncrystallizable water was 2. 13g/g dry resin.

对水凝胶的DSC测试得出聚丙烯酸钠水凝胶中每克干树脂中含2.13克非冻结水。

Chitosan had been modified by polyacrylate sodium, glularaldehyde, and NaBH4, respectively, which afforded three kinds modified chitosan: polyacrylate sodium modified chitosan (CIS- PA4) chitosan bead and pentamethylene diamido crosslinked chitosan bead (CTSB- G- Hy). The adsorption properties of CTS-CTSB and CTSB-G-Hy were studied by L25(56) orthogonal experimental design. They show high adsorption activities for Pb2+ in solution. The highest removal efficiency of Pb2+ for CTS-PA4, CTSB and CTSB-G-Hy is 94%, 96% and 93%, respectively. The results showed the adsorption property of CTSB is the highest. The CTSB- G- Hy has good mechanical property, acid-resistance and alkali-resistance.

第二部分壳聚糖的改性及其对水溶液中铅离子的吸附性能研究以壳聚糖为原料制备了三种改性吸附剂——聚丙烯酸钠改性壳聚糖(CTS——PA_4)、珠状壳聚糖凝胶树脂和戊二氨交联珠状壳聚糖凝胶树脂，着重考察了CTSB—G—Hy的制备条件，并考察了三种吸附剂吸附6.3mg/L铅离子水溶液中铅的最佳使用条件，结果表明对CTS—PA_4而言当pb~(2+)溶液的pH在4～6.5之间，吸附剂用量为5g/L，吸附时间为1h时pb~(2+)去除率高于94％，CTS—PA_4可在酸性条件下使用，在碱性条件下依然有效但处理效果较差；CTSB对pb~(2+)具有很好的吸附能力吸附剂用量为5g/L，吸附时间为1h时处理效果极佳，pb~(2+)去除率高于96％；CTSB—G—Hy对pb~(2+)具有一定的吸附能力，吸附剂用量为3g/L，吸附时间为1.5h时处理效果最佳，Pb~(2+)去除率高于93％，而且CTSB—G—Hy的机械强度高，耐酸碱性强，可在较宽的pH范围内使用。

The effect of emulsifying agent and neutralisation level on the stability of the polymeric system was investigated.

以丙烯酰氧基Span-80为乳化剂，采用反相乳液聚合法合成了高分子量聚丙烯酸钠。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。