atactic

The effect of physical aging on the properties of atactic polystyrene

T g以下温度退火对无规聚苯乙烯性能的影响

Tensile mechanical behavior of vacuum CAST ATACTIC POLYSTYRENE FILMS

真空浇铸聚苯乙烯薄膜的拉伸力学行为

The fractionation, viscosity and light-scattering measurements for three types of polystyrene, i.e., atactic, isotactic and 1:1 mixture of the two, were studied.

本文报导了有规立构聚苯乙烯，无规立构聚苯乙烯和1∶1混合有规和无规立构聚苯乙烯的分级、粘度和光散射测试结果。

Progress in the synthesis of atactic polypropylene

无规聚丙烯的研究进展

Studies on atactic specific polymerization of propene with mononuclear Titanocene Catalysts

单茂钛催化剂的丙烯无规聚合反应及其动力学研究

Two-Dimensional ( 2D) FTIR Spectroscopic Study on Influence of Entanglements on Movements of Freeze-dried Atactic Polystyrene Molecules

二维红外相关光谱研究缠结对冷冻升华无规聚苯乙烯分子运动的影响

Synthesis of the Graft Polymerization of Methacrylic Acid onto Atactic Polypropylene

无规聚丙烯接枝甲基丙烯酸的合成

Heredopathia atactic polyneuritifor lacking motor coordination; marked or caused by ataxia.

缺乏运动协调；有明显的运动失调特点或由运动性共济失调引起。

The activity and stereospecificity of the catalyst were so high that the very small amount of catalyst residues and atactic polypropylene possibly formed during the polymerization process might be left in the product without any further treatment.

由于该催化剂具有高活性和高定向能力，催化剂的残渣和无规物的含最很低，因而可以不经处理而残留在产品中。

The catalytic efficiency was more than 34.8 kg/ g. The poly ( 1-butene)( PBt) included both isotactic structure and atactic structure.

实验表明，该催化体系对Bt聚合催化效率可达34.8kg／g，聚合物为全同立构和无规立构聚1－丁烯的混合物。

Polyacetaldehyde may exist in atactic, syndiotactic and isotactic forms.

聚乙醛可以以无规, 间同和全同形式存在.

Mechanism Analysis and Application of Atactic Polypropylene ( APP) Asphalt Waterproof Rolls for Highways and Bridges

路桥用APP防水卷材的防水机理分析与应用

Preparation of atactic polypropylene elastomers with a c_p~ ticl_2n [ si ( ch_3)_3]_2/ mao catalyst

Cp~TiCl2N[Si（CH3）3]2/MAO催化剂合成无规聚丙烯弹性体

Dilute solution properties and molecule chain dimensions of atactic polystyrene

无规立构PSt稀溶液的性质和分子链尺寸

Those with a random distribution of configuration are termed atactic.

构型无规分布的聚合物叫无规聚合物.

A Study of Stress-Yielding Mechanism of Aged Atactic Polystyrene

物理老化无规聚苯乙烯屈服机理的研究

The Physical Aging of Atactic Polystyrene Historical and Present Conditions of the Environmentally Friendly Polyurethane Tire Development

无规聚苯乙烯物理老化的研究历史和进展聚氨酯绿色轮胎的研究历史与现状

Effect of Dynamic Injection Molding on Aggregation Structure and Mechanical Properties of Atactic Non-crystal PS

全程动态注射对无规非晶型PS制品聚集态结构与性能影响的研究

Car B on-13 NMR study of chlorinated atactic polypropylene

~（13）C核磁共振研究氯化无规聚丙烯的结构

Study of the assignment on the~ ( 13) c-nmr spectra of atactic polypropylene stereoisomers

无规聚丙烯~（13）C-NMR立构序列归属的研究

A Study of Synthesis of Atactic branched Polystyrene ( ABPS) in One Step

一步法合成无规支化聚苯乙烯（ABPS）的研究

Finally the pentad sequences of atactic PEMA were calculated based on the discussion mentioned above.

最后计算了无规PEMA的五元组立构序列分布。

Isotactic diad decreases with the increase of radiation dose . Meanwhile, atactic and syndiotactic diad increases.

随着辐照剂量的增加, 全同立构含量逐渐减少,而无规立构含量和间同立构含量却逐渐增加.

The original TCM data is too atactic to data mining.

中医药原始数据的不规则，使数据挖掘难以进行。

Study on Chlorination of Atactic Polypropylene and Structure of the Products

无规聚丙烯的氯化及产物结构的初步研究

Polyacetadehyde may exist in atactic, syndiotactic and isotactic forms.

聚乙醛它和聚烯烃一样,可以以无规, 间同和全同形式存在.

Results showed that head-tail addition and atactic structure were dominant in polyether microstructure.

结果表明，聚醚的序列结构以头-尾相连为主且呈无规立构分布的特点。

It was concluded from the experiment that the content of the isotactic polymer was the lest, the syndiotactic polymer was the most and the atactic polymer was between them.

由实验得到以下主要结论：PA-18降凝剂结构中全同立构聚合物含量最少，间同立构聚合物含量最多，无规立构聚合物含量介于两者之间。

Synthesis of atactic polypropylene elastomers with half-titanocene catalyst in different solvents Study on the Structure and Property of Polyether-Urethane Elastomers

不同溶剂中合成弹性无规聚丙烯聚醚氨酯结构与微相分离的研究

The simulation results show that the discontinuous increase of number of layers appears in meso-scale sandwich structure with an existence of atactic transition, when the plate-to-plate distance increases.

模拟结果表明，随板间距的增大，体系分层数量的增加是不连续的，在分层数量的增加过程中，出现不规则结构的过渡区；