查询词典 nucleating

Sorbitol acetals is the most one kind of the nucleating agents for polypropylene crystallization.

山梨醇缩醛是最重要的聚丙烯成核剂之一。在酸催化下，山梨醇与芳香醛反应可以合成山梨醇缩醛。

Bubble nucleating and porosity were improved by adding lignin granule, and cell size of the polyurethane foam was decreased. Not only physical property but also thermal property of the material were enhanced. Compared with soft polyurethane foam, tensile strength of lignin reticulated polyurethane foam was raised by 140% at most which lignin content was 5%, and the heat-degradation temperature at the first stage was 50℃ more than soft polyurethane foam which lignin content was 10%. There had been a great improvement in heat resistance of the material. It was showed that weight of biological film reached to 10000 mg/L and 12100 mg/L when the lignin content of the polyurethane foams was 5% and 8% respectively via 30-day biofilm formation testing.

实验结果表明：1，4-二氧六环对木质素的溶解能力是最好的，可使木质素均匀分散在聚氨酯泡沫塑料中；木质素颗粒的加入可改善发泡过程的成核作用，提高聚氨酯泡沫的开孔率，降低泡沫孔径，并且能提高材料的力学、热学性能，与软质聚氨酯泡沫塑料相比，木质素含量5%的聚氨酯泡沫塑料拉伸强度最大可提高140%，木质素含量10%的聚氨酯泡沫塑料发生第一阶段失重的温度提高了50多度，材料的热稳定性大大提高；经过30 天的挂膜测试，木质素含量5%和8%的聚氨酯泡沫塑料的挂模量可分别达到10000 mg/L和12100 mg/L。

This has an important meaning to the industrial manufacture.DSC, WAXD and polarizing microscope with hot stage experiments were performed to describe what led the SSP rate acceleration of PET/MMT. It was shown that montmorillonite acted as a very good nucleating agent in PET crystallization process, which results in the lower crystallinity, more small microlites, and more surfaces of microlites.

为研究PET／MMT固相缩聚效率提高的原因，通过热台偏光显微镜、DSC、X-射线衍射等手段对样品的结晶进行观察与分析研究，结果表明蒙脱土对PET的结晶有明显的成核作用，使其晶核生成速率迅速提高，晶核数量明显增多，从而使整个结晶过程的时间变短，同时形成了更多结构不完善的微晶体。

It is showed that the filled nano-SiO_2 acts as a nucleating agent. The characteristics and crystal structures of UHMWPE/nano-SiO_2 composites were studied and observed by Polarizing Microscope, and were compared with that of the pure UHMWPE.

与其它的工程塑料相比，UHMWPE热变形温度低，这是由于它的分子结构和分子聚集形变结构造成的，为此，近年来为改善UHMWPE的热性能，人们进行了大量的研究工作，以扩大其应用范围[12]。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。