交酯

In this paper, a series of low cross-linking polyurethanes are synthesized using polycaprolacton or polybutamethylene adipate or polyethylene-propylene adipate, MDI and glycerin. Their mechanical, thermal and dynamical properties and shape memory function are studied.

采用聚己二酸乙丙二醇酯、聚己二酸丁二醇酯、聚己内酯和 4，4'-二苯基甲烷二异氰酸酯为原料，以丙三醇为交联剂合成了一系列低度交联的聚氨酯，讨论了组成、配比等对性能的影响，比较了它们和线型聚氨酯在性能上的差别。

High oil absorption resins of higher n-alkyl acrylates modified cotton linter were synthesizedby supension graft copolymerization. The effects of the ratio of n-alkyl acrylates to linter, the kinds and amounts of crosslinker, the amounts of initiator, as well as reaction temperature and time on oil absorbency were investigated.

以棉短绒为基材，丙烯酸长链酯为单体，双丙烯酸二元醇酯为交联剂，采用悬浮接枝共聚法合成了高吸油性材料，考察了棉纤维与单体的投料比、交联剂种类与用量、引发剂用量、聚合反应温度与时间等因素对该材料吸油性能的影响，得到了不同丙烯酸长链酯与棉纤维接枝聚合制备吸油材料的最佳工艺条件。

Using tapioca starch as raw material to prepare oxidized starch is better if we need the oxidized starch with low viscosity,can be used with high concentration starch slurry, and good transparency, good whiteness, low retrogradation and syneresis. Then, the research of using oxidization technology to improve the properties of tapioca crossed-linked and esterified starch was also researched: under the conditions of

然后，研究了应用氧化技术来改善木薯交联酯化淀粉的性能，在次氯酸钠用量为0.2%， pH8.5恒定反应，室温反应，反应过程不控温的反应条件下对木薯交联酯化淀粉进行氧化，可以在保持其交联酯化淀粉的应用性能不改变的前提下，大幅度提高产品的透明度，改善了产品应用性能。

Therefore esterification crosslinked reactionbetween polyearboxylic acid and wood can be quantitatively determined.According toexperiment results of stereoscopic configuration choices by crosslinking agents,crosslinkingreaction between model of reaction intermediate and wood,and the intermediate characteristic incrosslinking reaction,crosslinking reaction intermediate was proofed.We can infercrosslinking reactions between polycarboxylicacid and wood want through a mechanism of twosteps reaction process,the first cyclic anhydrides were formed as intermediates by dehydratingbetween hydroxyls in polycarboxylic acids,second esters were occurred by substitution reactionbetween wood hydroxyls and cyclic anhydrides.

从而可全面定量表征木材与多元羧酸类化合物的酯化交联反应；依据交联剂立体构型选择性、反应中间体模型物与木材的交联反应和交联反应中间体的波谱特征实验结果，证实了交联反应中间体，因此可以推测：多元羧酸类化合物与木材化学组分的交联反应是经历两步反应的机理，首先多元羧酸中相邻羧基的羟基之间脱水形成五元环酸酐中间体，然后木材的羟基与酸酐发生亲核取代反应形成酯。

In order to enhance the compatibility of ABS/PP/CaCO3 composites, the effects of reactive blends of the composites were studied by using Haake rheometer. The effects of various assistant cross-linkingers, such as castor oil, triallyl isocyanurate, turpentine (JS-1) and glycol dimethacrylate, and the used amount of cross-linkinger-dicumyl peroxide on the torques of the melting composites were investigated.

为提高ABS/PP/CaCO3复合材料相容性，采用转矩流变仪观察了ABS/PP/CaCO3三元复合物反应性共混后的扭矩，考察了不同的助交联剂蓖麻油、异氰脲酸三烯丙酯、松香酯(JS-1)、二甲基丙烯酸乙二醇酯以及交联剂过氧化二异丙苯的用量对共混物的影响。

Diethanol amine and 2,2-bis(methylene-2-bromoisobutyrate) propionyl chloride were used as divergent reagents respectively before preparations of the second and the third generations. The resultant polymers were characterized by GPC and ~1H NMR.

为了利用含有可降解链段的树枝状聚合物(dendrimer-like polymer)制备纳米空心球，我们结合ATRP和开环反应合成了两种苯乙烯和L-丙交酯的三代树枝状共聚物CPSt(PLLA_2_2_3和CPSt(PLLA_2_2_4。

In chapter four, molecular imprinting polymers against amino acid derivatives utilizing 2-VP+AM as combined functional monomer and trimethylolpropane trimethacrylate as tribasic cross-linker were prepared and result was compared with those with the same amino acid derivative as the imprinted molecules utilizing ethyleneglycol dimethacrylate as dibasic cross-linker. It was found that cross-link intensity of the molecular imprinting polymer is higher when TRIM was utilized and baseline separation for the imprinted molecule could be achieved. When TRIM was utilized as cross-linker more molecule is imprinted during the polymerization.

第四章采用2-乙烯基吡啶+丙烯酰胺复合功能单体，考察了三元交联剂三甲氧基丙烷三甲基丙烯酸酯烙印氨基酸衍生物的情况，并与二元交联剂乙二醇二甲基丙烯酸酯烙印相同氨基酸衍生物的情况进行了对比，发现三甲氧基丙烷三甲基丙烯酸酯交联剂在较小的用量下就可使分子烙印聚合物达到足够的交联度，实现烙印分子的基线分离。

By studying the influences that pH and SMTP act on the cross- linking reactions of potato starch and sweet potato starch, the cross-linking reaction mechanisms of PSPE and SPSPE were proposed and the chemical reactive velocity equations were determined. The relations between cross-linking reactions and temperatures were studied, meanwhile the activation energy of chemical reactions and apparent frequency efficient of cross-linking reactions were calculated. Technical conditions of preparing PEPS and SPEPS were determined.

3研究了pH值和三偏磷酸钠浓度对马铃薯淀粉和甘薯淀粉交联反应的影响，提出了低交联马铃薯淀粉磷酸酯和甘薯淀粉磷酸酯的交联反应机理，确定了化学反应的速率方程式，研究了温度对交联反应的影响，计算了马铃薯淀粉交联反应和甘薯淀粉交联反应的活化能和表观频率因子，确定了制备低交联马铃薯淀粉磷酸酯和甘薯淀粉磷酸酯的工艺条件。

Recrystallization and filter under reduced pressure were used .

然后，本文还探讨了L-丙交酯的提纯方法。

The preparation method determines the optimized process of the lactide reaction based on oil return-service, prepares the low/zero trans fatty acid base oil, so as to reduce the content of trans fatty acid in oil products, lay foundation for the development of the base oil of margarine and shortening to the nutrition and health direction, and help the development of the special oil industry of our country.

本发明在油脂复配基础上，确立交酯反应的优化工艺，制备低/零反式脂肪酸基料油，以降低油脂产品中的反式脂肪酸含量，为人造奶油、起酥油的基料油向营养健康方向发展奠定基础，有利于我国专用油脂产业的发展。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。