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
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。
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
Synthesis of High Molecular Weight Atactic Polypropylene& Polymerization in Alkane and Preliminary Characterization of the Products 合成高分子量无规聚丙烯&在烷烃溶剂中聚合及性能初步表征
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。
The effect of physical aging on the properties of atactic polystyrene Tg以下温度退火对无规聚苯乙烯性能的影响
The stess yielding mechanism of aged atactic polystyrene(α-PS) was studied by use of mechanical tension, differential scanning calorimetry ( DSC) and solvent-swelling. 利用机械拉伸、示差扫描量热(DSC)以及溶剂溶胀等方法研究了物理老化后的无规聚苯乙烯(αPS)的应力屈服行为,并从凝聚缠结的观点对实验结果进行了解释。
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
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
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。
Flexibility and Temperature Features of Atactic Polypropylene Chain 无规聚丙烯链的柔性和温度特性
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。
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。
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
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。
Utilization of Fly Ash in Atactic Polypropylene Modified Waterproof Bituminous Sheet Materials 粉煤灰在弹、塑性体改性沥青防水卷材中的应用
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
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
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
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
Taking analysis of particle size of atactic slice graphite for example, the effective factor of analysis result was studied, such for the principle of analysis, particle shape and so on. To select suitable way and apparatus was very important to accurately analyze the particle size. 以不规则片状超细石墨粒度分析为例,探讨了分析原理、颗粒形状等因素对分析结果的影响,说明应怎样选择适合的方法和仪器来进行粒度分析。
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
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
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
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。
The products were characterized by nuclear magnetic resonance, differential scanning calorimetry, gel permeation chromatograph, dynamic mechanical analysis and thermogravimetry. The results indicated that the products were high molecular weight atactic polypropylene which showed dynamic mechanical behavior of rubber and good thermal stability. 用核磁共振碳谱、差示扫描量热法、动态力学分析等测试表明,该产物为高分子量无规聚丙烯(APP),呈现橡胶的动态力学行为,并具有良好热稳定性。
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。
Progress in the synthesis of atactic polypropylene 无规聚丙烯的研究进展
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
According to the results of structure parameters of polymer chains and DSC analysis, it is concluded that the resulting PP has multi-stereoblock structure with many short isotactic blocks interrupted by atactic blocks along the chain. 通过对聚合物链的结构参数计算以及DSC分析表明,所得聚丙烯表现为等规-无规嵌段交替出现的多立构嵌段的结构。