甲基丙酸烯

PH of filtrate is kept below 0.65 in order to avoid the reaction between sodium formate and iodine bromide. Then iodine bromide halogenation method is used to determine quantitatively the content of the third monomer, i.

控制滤液pH在0.65以下，以防止甲酸钠和溴化碘起反应，然后用溴化碘卤化法定量测定滤液中的第三单体甲基丙烯磺酸钠的含量。

The water content, dimensional change, mechanical property, high temperature water retentivity and proton conductivity of the membranes were investigated.

制备了聚2-丙烯酰胺－2-甲基丙磺酸质子交换膜并对其进行交联改性，研究了膜的含水率、溶胀率、拉伸强度、高温保水率、质子电导率等性能。

Similar to S-adenosylmethionine decarboxylase(B26),S-adenosylmethionine methyl-transferase(B70), allene oxide synthase(B38),ethylene receptor(B96),cytochrome P450(B58) and methionine synthase (B77) were found in ovaries of Pingyi Tiancha at 1d before the blossom day,which related to plant hormone and could participate in metabolic pathways of ethylene,polyamine,jasmonate acid and gibberellin,et al.,as well as had close relationship with maturity and senescence of plants.

在平邑甜茶开花前1d的子房中发现的S-腺苷甲硫氨酸脱羧酶(B26)、S-腺苷甲硫氨酸甲基转移酶(B70)、丙二烯氧化合酶(B38)、乙烯受体(B96)、细胞色素P450酶(B58)、甲硫氨酸合酶(B77)等相似基因片段与植物体内的生长素有关，将会参与乙烯、多胺、茉莉酸、赤霉素等的代谢途径，与植物的成熟和衰老具有密切的关系。

The stable or unstable state of the montmorillonite-water dispersion is mainly effected by the properties of montmorillonite, water, and stabilizers as well as their interactions, while the type, the structure, the properties and the concentration of the stabilizer play dominate roles. Based on the molecular designing clues, this research selected three sulfonated copolymers as the stabilizers, i.e. the sodium 2-acrylamido-2-methyl-1propane sulfonate /acrylamide /disodium itaconate terpolymer, the AMPS/AM/N-vinyl pyrrolidone terpolymer and the sodium styrenesulfonate /IA copolymer. The preparation and characterization of the sulfonated copolymers were discussed, the high-temperature stability of the montmorillonitewater dispersion was characterized with the rheology, the filtration, the particle size distribution, the electrostatic properties, and the adorption of the sulfonated copolymers onto montmorillonite particles. At the same time, a systematic mechanism of the hightemperature stabilization of the dispersion was presented.

本文构筑了分子设计的思路，选取AMPS(2-丙烯酰胺基-2-甲基丙磺酸钠)/AM/IA三元共聚物、AMPS/AM/NVP三元共聚物和SSA/IA二元共聚物等三种磺化共聚物作为蒙脱土-水分散体系的高温稳定剂，进行了磺化共聚物稳定剂的制备与表征；从流变学、滤失性能、粒度分布、电性质以及磺化共聚物在蒙脱土上的吸附作用等方面，对蒙脱土-水分散体系的高温稳定性进行了研究，考察了蒙脱土-水分散体系的高温稳定性能，同时提出了高温稳定机理。

The main products are : 2 - Acrylamido--2 - methylpropane sulfonic acidsewage treat agent etc.

主要产品为：2-丙烯酰胺基-2-甲基丙磺酸水处理剂等产品。

Self-crosslinkable latex at room temperature with high elasticity is prepared when N-hydroxymethyl acrylamide is used as self-crosslinkable monomer, and poly solidum maleate is applied as protective colloid, and pre-emulsified and semi-continuous seeded emulsion polymerization is adopted.

采用N-羟甲基丙烯酯胺为自交联单体，聚马来酸钠为保护胶体，采用预乳化半连续种子乳液聚合工艺，制备出高弹性室温自交联乳液。

Self-crosslinkable latex at room temperature with high elasticity is prepared when N-hydroxymethyl acrylamide is used as self-crosslinkable monomer,and poly solidum maleate is applied as protective colloid,and pre-emulsified and semi-continuous seeded emulsion polymerization is adopted.

采用N-羟甲基丙烯酰胺为自交联单体，聚马来酸钠为保护胶体，采用预乳化半连续种子乳液聚合工艺，制备出高弹性室温自交联乳液。

Acrylamio-2-methyl propane sulfonic acid is applied in the production of water-based latex,which copolymerizes with acrylic acid,styrene or vinyl acetate to turn out latex resin.

2-丙烯酰胺基-2-甲基丙磺酸应用于水基性胶乳的生产过程中，与丙烯酸、苯乙烯或醋酸乙烯发生异分子聚合而生成胶乳树脂。

The grafting copolymerization of 2-Acrylamido-2-methyl propane sulfonic acid onto soybean protein isolate was carried out in 8 mol/L urea aqueous solution with ammonium persulphate as initiator and β-mercaptoethanol as protein unfolding agent.

以亲水2-丙烯酰胺基-2-甲基丙磺酸为接枝单体、过硫酸铵为引发剂、β-巯基乙醇为大豆分离蛋白的变性剂，在8mol/L的尿素溶液中对SPI进行接枝共聚改性。

The copolymers of 2-acrylamio-2-methyl propane sulfonic acid and other water soluble monomers are indispensable chemicals in various papermaking plants,which can be used as water-displacing assistant agent,sizing agent and pigment dispersant of color coating and to enhance the strength of paper.

造纸2-丙烯酰胺基-2-甲基丙磺酸和其他水溶性单体的共聚物，是各类造纸厂不可缺少的化学品，它可作为排水助剂、施胶剂，增加纸的强度，还可作为彩色涂层的颜料分散剂。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。