氧丙环

The structure and property of 2,3-epoxypropyltrimethyl ammonium chloride, and the method of synthesizing cationic starch based on ETA and cornstarch are introduced in brief.

对2，3-环氧丙基三甲基氯化铵的结构和性质及以ETA和玉米淀粉为原料合成阳离子淀粉的方法进行了简要介绍。

The structure and property of 2,3 epoxypropyl trimethyl ammonium chloride, and the method of synthesizing cationic starch based on ETA and cornstarch are introduced in brief.

对 2 ，3 环氧丙基三甲基氯化铵的结构和性质及以ETA和玉米淀粉为原料合成阳离子淀粉的方法进行了简要介绍。

Experimental results show:(1) Among twelve functional molecules, 2, 3-epoxypropyltrimethylammonium chloride mainly to the electrostatic interaction, sulfamethoxypyridazine and cephalin mainly to the hydrophobic interation have stronger interacton with endotoxin.

实验结果表明：(1)12种功能基团中，以静电相互作用为主的2，3环氧丙基三甲基氯化铵和以疏水作用为主的磺胺甲氧哒嗪、脑磷脂对内毒素有着较强的相互作用。

The factors affect on the degree of substitution of product, yield and apparent viscosity, such as the mol rates of EPTAC with -NH2, reaction temperature, reaction time and the content of water in system have been discussed in detail. FTIR spectrometer and UV spectrometer are used to characterize the structure of the derivative and it is proved that substitution reaction mainly occurs on the -N element .The particle size and morphology of chitosan and quantemary ammonium salt of chitosan are analysised by comparing photos of their scanning electron microscope. The degree of substitution of HACC is determined by acid -base conductometric titration. An error in current formula of DS has pointed out and a correct formula has presented.On the base of experience of above experiment, the reaction conditions of HACC were systematically investigated through orthogonal design, and then the best conditions are found. Water-solubility and dependence of pH are studied.

壳聚糖和环氧丙基三甲基氯化铵在异相条件下发生反应，通过单因素实验，制备了一系列不同性能的壳聚糖季铵盐，本文首次详细讨论了反应条件(反应摩尔比、反应时间、反应温度、水含量)对产率及产物性能的影响；用红外光谱和核磁共振对结构进行表征分析时，发现季铵盐阳离子基以N位上取代为主；通过电镜图片对壳聚糖和季铵盐衍生物外观形貌进行对比，采用酸碱电导滴定法测定产物的取代度，并对常用取代度公式做了修正。

In this part of dissertation, the cure reactions of PGA withhexamethylene diisocyanate isocyanurate were investigsted byFTIR, DSC and gel fraction.

本文用FTIR、DSC和凝胶含量的测定等方法，对聚丙烯酸环氧丙酯和六亚甲基二异氰酸酯三聚体的固化反应进行了研究。

In this paper, triglycidyl isocyanurate acrylate which used as oligomer in UV coating was synthesized by the reaction of triglycidyl isocyanurate with acrylic acid.

以三异氰尿酸酯作为树脂基体，经丙烯酸加成酯化，得到了三官能团环氧丙基异氰尿酸丙烯酸酯。

The cure reactions of ternarysystem containing poly, poly and HDI isocyanurate, and the effect of the ratio ofPGA/POH on the thermal, mechanical and surface properties of curedresin have also been examined.

本文还研究了聚丙烯酸环氧丙酯、聚丙烯酸羟丙酯和六亚甲基二异氰酸酯三聚体的反应及三元反应体系中PGA／POH的不同比例对交联后树脂的热性能、力学性能及表面性能的影响。

Which is considered to be a key organoleptic constituent of Yellow Passion Fruit.

甲基-4-丙基 1，3-氧硫环己烷(Fema：3578)的香气，哪一个被认为是黄热带水果的主

It is found that compared with the untreated glass fiber reinforced unsaturated polyester, the fluoridized FRP"s property of anti-water and anti infirm-acid has enhanced, while theproperty of anti- strong acid, anti-strong alkali and anti-organic solvent hasn"t changed much.The property of anti-acid and anti-alkali of the glass fiber reinforced epoxy resin fluoridizedby 3-(1H, 1H, 5H-Octafluoropentyloxy)-1, 2-Propenoxide has a corresponding increase, but theproperty of anti-organic solvent hasnt changed much.

研究发现，经G-02、G-04处理后的聚酯玻璃钢的与未处理的聚酯玻璃钢相比，其耐水性增强，耐弱酸性也有所增强，但耐强酸性、耐碱性、耐有机溶剂的腐蚀性变化不大；而经环氧丙基八氟戊醚处理后的环氧玻璃钢其耐酸耐碱性都有相应的增强，但是其耐有机溶剂的腐蚀性无太大变化。

By one-pot method,with p-toluenesulfonic acid as catalyst,trimethyl orthoformate and cyclohexanone reacted in isopropanol to form 1,1-dimethoxycyclohexane,which,without separation,reacted furthur with isopropanol to form the title compound by distilling off the low-boiling product.

用一锅法，以对甲苯磺酸为催化剂，在异丙醇中原甲酸三甲酯与环己酮反应，其产物不经分离直接与异丙醇交换，得到1，1-二异丙氧基环己烷。

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。