查询词典 poly

The invention relates to a process for producing polyethylene terephthalate 1, 3-propanediol, which comprises the following steps: using titanic acid ester as major catalyst, using germanium compounds and cobalt compounds as synergic catalyst, conducting esterification reaction for poly terephthalic acid and 1, 3-propanediol according to the molar 1:1.05-2.2 under the nitrogen pressure of 0.1-0.4MPa and 230-265 DEG C, or conducting ester exchanging reaction for poly terephthalic acid and 1, 3-propanediol according to the molar ratio 1:1.8-2.2 in 160-220 DEG C, decompressing reaction to high vacuum 10-150Pa, wherein the final temperature of reaction is 265-275 DEG C, recovering to normal pressure with nitrogen to obtain the PTT product.

本发明涉及一种生产聚对苯二甲酸1，3-丙二醇酯的方法，采用以钛酸酯为主催化剂，锗化合物和钴化合物为协同催化剂，对苯二甲酸二甲酯和1，3-丙二醇按摩尔1∶1.05-2.2，在0.1-0.4MPa氮气压力和230-265℃下进行酯化反应，或对苯二甲酸二甲酯和1，3-丙二醇按摩尔比1∶1.8-2.2，在160-220℃进行酯交换反应，将反应减压至高真空10-150Pa，反应终温在265-275℃，用氮气恢复到常压，得到本PTT产品；大大缩短了反应时间，直接聚合制备特性粘度在0.7-1.05dL/g的PTT切片，使反应产物色相良好，PTT产品可用于纤维加工及工程塑料领域。

Cytotoxicity experiment: In the leaching liquid of γ- poly-glutamic acid hydrogel, the L929 cells were with good shape and grew adherently. MTT experiment demonstrated that the toxicity of the leaching liquid of γ-poly-glutamic acid hydrogel was 0 or 1 degree.

细胞毒性实验结果：L929细胞在γ-多聚谷氨酸水凝胶浸提液中形态正常；MTT检测表明γ-多聚谷氨酸水凝胶浸提液组毒性为0级或1级。

Methods and Results— We synthesized the 3 components of a gene vector binding complex:(1) A poly allylamine bisphosphonate with latent thiol groups,(2) a poly ethyleneimine with pyridyldithio groups for amplification of attachment sites , and (3) a bifunctional (amine- and thiol-reactive) cross-linker with a labile ester bond.

方法和结果—我们综合了基因复合物载体的三种成分：(1)巯基聚丙烯胺二碳磷酸盐化合物，(2)能扩增结合位点聚乙烯亚胺-pyridyldithio复合物，(3)具有不稳定酯键的双功能交联剂。

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。

Study on the Modification of Poly (3-hydroxyalkanoate) The aim of this dissertation is to modify bacterially produced poly (3-hydroxybutyrate) and its copolymer with 3-hydroxyvalerate .

本论文目的是改性细菌合成的聚（3-羟基丁酸酯）及其共聚物，采用交联或共混的方法，改变其聚集态结构或超分子结构，从而改善其力学性能。

For the PEO-grafted polyaniline series with different contents of EO units, the benzenoid absorption peaks exhibited blue shifts in comparison with polyaniline, the shifts became greater as the content of EO units increased.

与聚苯胺相比，在共聚物的UV-Vis吸收光谱中，原来320nm处的苯环吸收峰出现了蓝移，其蓝移程度随着共聚物EO单元含量的增大而加剧，且Poly较Poly发生更大的蓝移。

Bis-(4-bromobenzoyl) benzene as the monomer of poly was synthesized by Friedel-Crafts benzoylation reaction. Poly-Ⅱ synthesized via palladium-catalyzed aryl amination reaction using 1, 4-bis-(4-bromo-benzoyl) benzene and 4, 4'-diaminodiphenyl ether as monomers.

通过傅－克酰基化反应合成了1，4-双－（4'-溴苯酰基）苯，以1，4-双－（4'-溴苯酰基）苯和4'4-二氨基二苯醚为单体，通过钯催化的胺基化缩聚反应合成了高性能聚合物－聚亚胺酮－Ⅱ。

In this work,two novel high performance thermoplastics,poly(phthalazinone ether sulfone ketone) and poly(phthalazinone biphenylene ether sulfone),were used to toughen epoxy resin by blending.

本论文采用本课题组开发的含二氮杂萘酮结构的聚醚砜酮及共聚醚砜与环氧树脂共混，以期实现对其增韧。

Composite films from polypyrrole and some conventional polymer matrixes such as poly and poly,could not only integrate the exciting multifunctionality of polypyrrole as well as the good film-formability and much lower cost of the matrix polymers,but also produce a novel coadjutant effect of...

聚吡咯与常规聚合物基体如聚乙烯醇、聚氯乙烯等形成的复合膜不仅可以综合聚吡咯奇异的多功能性与常规聚合物的易成膜性和低成本性于一体，而且可望发挥两者的协同效应，从而大大拓宽其应用领域。

With the aim of enhancing the nonlinear optical property of poly, poly[(thiophene-2,5-diyl)p-(N,N-dimethylamino) azobenzylidene] is prepared from 4-aldehyde-4'-dimethylamino azobenzene and thiophene through condensation polymerization reaction.

为了提高聚噻吩甲烯的非线性光学性能，通过4-醛基-4'-二甲胺基偶氮苯和噻吩的缩聚反应，合成了聚噻吩对二甲氨基偶氮苯甲烷，再用PTDMAAB与四氯苯醌发生脱氢反应合成了侧链含偶氮的聚噻吩甲烯。

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。