查询词典 retardants

In this paper, starch was used as a char forming agent to all or partly replace pentaerythitol in Intumescent Flame Retardants, and investigated to effect on thermal degradation and flame retardancy of polyethylene intumescent system.

以淀粉作为膨胀阻燃体系中的成炭剂，取代或部分取代了膨胀型阻燃剂中的季戊四醇，研究了淀粉对膨胀阻燃剂及其与线性低密度聚乙烯膨胀体系的热降解行为和阻燃性。

The company has two production¨×biopsy device, the three modified PTT and PTT fibers,¨×fiber production line, a set of three monomers (isophthalic acid, 5 - sodium) production unit, a four-monomer production line with annual production of 15,000 tons slice¨×composite and PTT fibers, staple¨×compound, PTT modified fiber 15,000 tons and 1,000 tons of the four monomers, three monomers 1200 tons, brominated flame retardants EPS with the capacity of 3000 tons .

公司拥有两套波斯伦切片生产装置，三条PTT及改性PTT纤维、波斯伦纤维生产线，一套三单体（间苯二甲酸，5-磺酸钠）生产装置，一套四单体生产线，具有年生产波斯伦复合切片15000吨和PTT纤维、波斯伦复合短纤、PTT改性纤维15000吨及四单体1000吨，三单体1200吨、溴系EPS用阻燃剂3000吨的能力。

The non-halogen flame retardant PP was prepared by using magnesium hydroxide sulfate hydrate whisker and organophilic montmorillonite as flame retardants. The effects of the contents of MOS and OMMT on the mechanical properties and flame retardancy of the PP were studied. The composites were characterized by means of TGA and CONE.

采用碱式硫酸镁晶须与有机蒙脱土作为阻燃剂制备了阻燃聚丙烯，研究了MOS和OMMT用量对阻燃PP力学性能和阻燃性能的影响，并通过热失重分析和锥形量热仪对材料进行了表征。

In fifth part, flame retardant PA6/OMT and ABS/OMT nanocomposites were prepared using direct melt intercalation technique by blending PA6 or ABS, organophilic clay and different conventional fire retardants together.

第五部分工作中，选用OMT配合不同的阻燃体系对聚合物进行阻燃，制备了PA6和ABS的阻燃纳米复合材料。

Flame retardants may interrupt or change the decomposition process in several ways:(1)they may melt at relatively low temperatures and resolidify in the form of a foam, which serves as a barrier to heat transfer from the flame to the substrate;(2) they may be converted upon heating into acids or bases, which catalyze the decomposition of the substrate at lower temperatures than are required for the formation of volatile combustibles;(3 ) they may decompose orsublime upon heating to release large amounts of nonflammable vapors which exclude oxygen from the flame; or (4) they may react with chemicakl species within the flame to stop the combustion reaction.

阻燃剂可以从几个方面干涉或改变织物的分解过程：（1）阻燃剂在相对较低的温度时会熔化，然后重新固化成泡沫状，这样就形成了一个屏障，阻止了从火焰向织物的热传递。（2）阻燃剂受热时会分解成酸或碱，这些酸或碱在低于可生成挥发性可燃物的温度下可以催化织物的分解。（3）阻燃剂在受热时会分解或升华，同时释放出大量不可燃气体，这就阻止了氧气对火焰的供应。（4）阻燃剂可以与火焰中的化学物质起反应，使燃烧反应终止。

Highquality hydrogen for industry uses,dilute nitric acid,refined nitric acid,calcium nitrate tetrahydrate,calcium nitrate dihydrate,corrugated metal structured packing,catalyst for polyethylene,ultrahighmolecular weight polyethylene,15N labelled compounds,purificants of petrochemical industry,highmolecular flame retardants,molecular sieve desiccant,chemical machinery and equipment,separation equipment for chemical industry,testing and monitoring analyzers,detectors and equipment.

工业用优质氢，优质硝酸，硝酸钙，硝酸钙，金属规整波纹填料，聚乙烯催化剂，超高分子量聚乙烯，N15标记化合物，石化净化剂，高分子材料阻燃剂，分子筛干燥剂，化工机械和设备，化工分离设备，化工检测设备。

One-step synthesis of the high molecular weight bromated epoxy resins for flame retardants is studied with tetrabromobisphenol A and epichlorohydrin as raw materials in mixed solvent comprising 1,4-dioxan and water.

研究以四溴双酚A和环氧氯丙烷为原料在二氧六环和水混合溶剂中一步法合成了高分子量溴化环氧树脂阻燃剂。

Brominated flame retardants are of great concern due to their widely use and adverse effects to environment and human.

溴系阻燃剂的广泛使用及其对环境和人体的危害，受到人们的广泛关注。

In spite of facing environmental pressure, brominated flame-retardants will be used continuously in many countries, and there will be a great demand for these additives in recent years at home and abroad.

溴系阻燃剂虽面临环保方面的一些压力，但它们在一定时期内还会在很多国家生产和使用。

The properties, flame retardant mechanism of the brominated flame retardants were described.

经过对溴系阻燃剂的市场消费量的分析，表明溴系阻燃剂是一时难以被替代且具有良好发展前景的阻燃剂。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。