二甲酸

Copolymerization modification of PET was made by means of adding a third monomer on a homemade facility. The effects of the content of the third monomer NPG on the T, melting behavior and heat shrinkability of PET were studied, and the effect of drawing technology on the shrinkage of the film was also studied.

运用自制的反应装置，通过加入第三单体的方法对聚对苯二甲酸二醇酯进行了共聚改性，研究了第三单体新戊二醇用量对PET玻璃化转变温度T、结晶熔融行为和热收缩性能的影响，同时对拉伸工艺对薄膜收缩率的影响也进行了研究。

Copolymerization modification of PET was made by means of adding a third monomer on a home-made facility. The effects of the content of the third monomer NPG on the T_g, melting behavior and heat shrinkability of PET were studied, and the effect of drawing technology on the shrinkage of the film was also studied.

运用自制的反应装置，通过加入第三单体的方法对聚对苯二甲酸二醇酯进行了共聚改性，研究了第三单体新戊二醇用量对PET玻璃化转变温度Tg、结晶熔融行为和热收缩性能的影响，同时对拉伸工艺对薄膜收缩率的影响也进行了研究。

AIM: To establish a method to determine 2,6Dimethyl4(3nitropheny1)1,4 dihydropyridine3carboxylic acid dimethylester5carboxylic acid pentyl ester (MN9202) in biological medium by reversephase highperformance liquid chromatography.

目的：建立生物介质中1，4二氢2，6二甲基4(3硝基苯基)3，5吡啶二甲酸甲戊酯（MN9202）的高效液相色谱检测方法。

By using ethanol precipitative pretreatment and rectification patent technology,the product 1,3-propanediol with purity of 99% had been harvested,the seperation yield of 1,3-propa...

采用发酵液醇沉预处理、再精馏的专利技术可分离得到纯度大于99%的1，3-丙二醇产品，分离收率大于85%，产品质量达到了聚对苯二甲酸丙二酯聚合反应的要求。

Propanediol (1,3-PD) is an important intermediate in the production of polyesters propylene terephthalate.

1，3-丙二醇是合成聚对苯二甲酸丙二醇酯的重要原料。

Good yield of the pure monomer bis(2-hydroxyethylene terephthalate) was obtained.

良好的收益率的纯单体二（ 2 - hydroxyethylene对苯二甲酸乙二醇酯）获得。

For example, there is only local cooperative organization between polymer segments of atactic poly in the middle-sized solvent poly with molecular weight 200g/mol (PEG200). But for the stereo-regular isotactic polystyrene, pronounced content of 3〓 helix can be found in its middle-sized solvents.

例如，无规聚甲基丙烯酸甲酯在聚乙二醇（分子量为400）中分子溶剂中表现为链段的局部协同组织，而等规聚苯乙烯在邻苯二甲酸二辛酯、氯代十四烷等中分子溶剂中则出现相当含量的3〓螺旋构象。

Methods DA,Carbopol,dextrin,magnesium stearate,eudragˉit,titanium dioxide,yellowish pigment and diocytl phthalatewere mixed by certain technique.Then a kind of new bistratal durg-film was formed which contained both soluble and insoluble high polymer materal layer.Ingrediˉents of the film were measured and mucous membrane tests were done.

将醋酸地塞米松、卡波普、糊精、硬脂酸镁、丙烯酸树脂、二氧化钛、黄色素、邻苯二甲酸二辛酯等经一定工艺，形成由可溶性粘附性高分子材料及不溶性高分子材料组成的新颖双层粘贴片，并作含量测定及缓释透粘膜实验。

Compounds were determined from more than 3 stages, including germacrene D, caryophyllene, phenol, 2, 6-bis (1, 1-dimethylethyl)-4-methyl-,β-elemene,γ-elemene, 1-octanol, 2-butyl-, dibutyl phthalate, cyclohexane, 1-ethenyl-1-methyl-2-(1-methylethenyl)-4(1-methylethylidene)-and butyl caprylate.

其中，3个时期以上能检测到相同的化学成分有9种，分别是大牻牛儿烯D、丁香烯、2，6-二叔丁基－4-甲基苯酚、β-榄香烯、γ-榄香烯、2-丁基－1-辛醇、邻苯二甲酸二丁酯、1-乙烯基－1-甲基－2-（1-甲基乙烯基）－4-（1-甲基亚乙烯基）环己烷和辛酸丁酯。

The different molar ratio of hexane diacid to terephthalic acid with the same molar diamine is designed to give the composites with different viscosity, thermal performance and the barrier properties. The 3-10 times of enhanced barrier properties of these polyerster based nanocomposites with this above MXD6T to pure polyester resins are first reported.

在相同摩尔二胺的情况下，不同摩尔比例的己二酸和对苯二甲酸使复合材料具有不同的粘度、热性能和阻隔性能，含有NMXD6T改性剂的聚酯其阻隔性能相对于纯聚酯提高了3-10倍。

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。