查询词典 polystyrene

Aromatic and aliphatic aldoxime s could be efficiently converted into the corresponding carboxylic acid esters by treatment aldoxime s with an alcoholic solution of 30% hydrogen peroxide in the presence of catalytic amounts of polystyrene-bound phenylseleninic acid.

在30%双氧水和醇组成体系中，聚合物负载的苯亚硒酸试剂可有效地促进过氧化氢氧化肟转变成羧酸酯；相应伯醇和仲醇的羧酸酯的产率中等到良好，但在含叔醇的体系中没有相应的羧酸酯生成。

The remaining South American market will be supplied with these products and with polystyrene from BASF sites in Antwerp, Belgium, and Altamira, Mexico.

其余南美市场将供应这些产品和来自比利时安特卫普和阿尔塔米拉，墨西哥巴斯夫聚苯乙烯的网站。

According to the physical aging behavior of rapidly quenched atactic polystyrene , it was found that dual amorphous phases with quite different properties were formed due to the internal stress: free amorphous phase and constrained amorphous phase.

通过研究快速淬冷无规聚苯乙烯的物理老化行为发现，在此试样中由于内应力的存在而形成了两种性质大为不同的非晶区：自由非晶区和受限非晶区。

Combining PRISM theory, MD simulation and Variational method, a single-site semi flexible model is proposed to describe atactic polystyrene melt.

结合PRISM理论、MD分子模拟和变分法，得到了可以描述聚苯乙烯熔体的单点半柔性链模型，提出了一个研究实际聚合物体系的有效方法。

The stess yielding mechanism of aged atactic polystyrene was studied by use of mechanical tension, differential scanning calorimetry and solvent-swelling.

利用机械拉伸、示差扫描量热以及溶剂溶胀等方法研究了物理老化后的无规聚苯乙烯的应力屈服行为，并从凝聚缠结的观点对实验结果进行了解释。

The 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。

In order to learn the influence of entanglements and other factors on the structural changes of atactic polystyrene, freeze-dried single-chain samples were prepared from dilute solutions of atactic poly- styrene in benzene at different concentrations (1×10-4 and 2×10-5 g/mL).

利用FTIR测试方法，测定a-PS在等温处理时红外吸收峰的时间依赖性与温度依赖性，研究样品中链缠结和链结构单元的堆积等因素对红外吸收峰的影响，进而探讨链缠结对a-PS分子运动的影响。

Atactic polystyrene of larger molecular weight and narrower molecular weight distribution is prepared compared with the bulk polymer obtained outside the template.

以二氧化硅胶体晶为模板制备了无机/有机聚合物有序杂化体和聚合物孔材料，研究了聚合物在亚微尺度受限状态下的形成和性质。

The main results and conclusions are as follows:The trans-1,4 content of polybutadiene increased from 50%to 89%along with the increasing of Al/Li ratio;the trans-1,4 content of polyisoprene increased from 24%to 46%as well as 3,4 content along with the increasing of Al/Li ratio;the microstructure of polystyrene was invariable and atactic.

主要研究结果及结论如下：随着Al/Li的增加，聚丁二烯的反式结构含量从50%增加到89%；聚异戊二烯的反式-1，4-结构含量从24%增加到46%，并且其3，4结构含量也有所增加；聚苯乙烯的微观结构基本没有变化，为无规聚苯乙烯。

The main results and conclusions are as follows:The trans-1,4 content of polybutadiene increased from 50%to 89%along with the increasing of Al/Li ratio;the trans-1,4 content of polyisoprene increased from 24%to 46%as well as 3,4 content along with the increasing of Al/Li ratio;the microstructure of polystyrene was invariable and atactic.

加热器主要研究结果及结论如下：随着Al/L i的增加，聚丁二烯的反式结构含量从50%增加到89%；聚异戊二烯的反式-1，4-结构含量从24%增加到46%，并且其3，4结构含量也有所增加；聚苯乙烯的微观结构基本没有变化，为无规聚苯乙烯。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。