查询词典 polyethylene

Controlled-release membrane was prepared based on the phase inversion method in which circulated urea particles were coated with polyethylene and olefin dispersed in tetrachloroethylene solution. The effect of atomizing on the membrane structure and nutrients release characteristics was investigated systematically.

利用喷雾相转化法将聚乙烯和石蜡溶于四氯乙烯的溶液喷射到处于流化状态的大颗粒尿素上，制备控制肥料养分释放的控释膜，系统地研究了喷雾－相转化－成膜过程中雾化状态对控释肥料膜结构和养分释放性能的影响。

A container (1) containing a coating composition the container comprising a container body (21) and a lid (7), the lid comprising a collar (11) and a disc (12), the container body having an opening provided with a screw-thread (5) cooperable with a screw-thread (6) on the collar and closeable by said lid characterised in that the disc is formed of polyethylene terephthalate which is sufficiently transparent to allow the coating composition to be visible therethrough.

一种容纳涂敷组合物的容器(1)，该容器包括容器主体(21)和盖子(7)，该盖子包括套环(11)和盘(12)，该容器主体具有一设置有螺纹(5)的开口(2)，该螺纹可与该套环上的螺纹(6)配合使用，并且该容器主体可由该盖子封闭，其特征在于，该盘由聚对苯二甲酸乙二醇酯形成，其足够透明以便使得透过该盖子可看到该涂敷组合物。

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。

The invention relates to a preparation process for synthesizing polyethylene terephthalate 1, 3- terephthalate catalyst, which comprises adding titanic acid ester, germanium compounds and cobalt compound into liquid dispersed phase of organic solution, wherein the total weight concentration is 4-10%, and preparing the catalyst through mechanical stirring or ultrasonic wave mixed ligand for 10-60 minutes in 0-120 DEG C, wherein the adding content of titanic acid ester, germanium compounds and cobalt compound are respectively 200-500ppm, 50-300ppm and 100-400ppm of reaction monomer mass of terephthalic acid or dimethyl terephthalate.

本发明涉及一种合成聚对苯二甲酸1，3-丙二醇酯催化剂的制备方法，将钛酸酯、锗化合物和钴化合物加入到有机溶剂的液体分散相中，总重量浓度为4～10％，在0-120℃通过机械搅拌或超声波混配10-60min制得；钛酸酯、锗化合物和钴化合物加入量分别是对苯二甲酸或对苯二甲酸二甲酯反应单体质量的200-500ppm、50-300ppm、100-400ppm；用此催化剂制备PTT产品，酯化和缩聚反应时间相对于单独使用钛酸四丁酯缩短了30-60min，产品特性粘数0.70-1.05dL/g，色相b值在2-6之间，切片可用于加工新型合成纤维及工程塑料产品。

The microstructure of polyethylene was investigated using the techniques of 〓C NMR, DSC, TREF, gas chromatography and isothermal extraction fractionation.

通过改变两种茂金属催化剂的摩尔比例及不同的聚合温度，考察了不同条件对乙烯聚合的催化活性和所得聚乙烯分子量及分子量分布的影响。

With existence of a nonionic surfactant FAA,polyethylene glycol/surfactant complex exhibited good inhibition on clay minerals,despite it was a binary or trinary complex.

PEG和非离子表面活性剂FAA均具有较强的防膨作用，PEG/FAA二元复配体系对黏土的防膨作用优于其单一组分，说明FAA与PEG在防膨作用方面具有协同效应。

The surface modification and dispersion of nano- SiO_2 particles with polyethylene glycol is studied by FTIR and TEM, and the reaction mechanism of tung oil and phenol compound is discussed.

利用红外光谱和透射电镜研究了聚乙二醇对纳米SiO_2表面性能及分散性的改进效果，并探讨了桐油—苯酚化合物反应的机理。

Curwood's Dave Engen, market manager for cheese, describes the Curpolene 7202 film as a 2.6-mil, two-ply, coextruded lamination of oriented polyethylene terephthalate, laminated to a proprietary ethylene vinyl alcohol/nylon coex that offers superior resistance to heat and abuse, as well as superior machinability, and barriers and esthetics for nonrespiring sliced cheeses like Provolone and Cheddar.

curwood的戴夫Engen的，市场经理，奶酪，描述curpolene 7202电影作为一个2.6万桶， 2层，共挤层压面向聚对苯二甲酸乙二醇酯，层压到一个专有的乙烯-乙烯醇/尼龙国际会展中心，提供优越的抗高温和虐待，以及优越的可加工性，和障碍，美学为nonrespiring切片奶酪一样， provolone和干酪。

The authors compare the behaviors of space charge in dried and undried low density polyethylene and which doped with 0.5% Al_2O_3 powder via infrared spectrum method, thermogravimetry and the Pressure Wave Propagationmethod, and the water content is quantitatively measured.

作者通过红外吸收光谱法、热重分析法和压力波法，分别对低密度聚乙烯以及以0.5%Al2O3粉末掺杂的低密度聚乙烯在干燥前后的有关空间电荷行为进行了比较，定量给出水份含量和对应的空间电荷特性。

Obvious, with the pipe diameter increases, the use of polyethylene pipe has a very uneconomical.

明显地与管径的增加，对聚乙烯管道的使用有一个非常不经济的。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。