查询词典 polyvinyl

At the same time from the process of alcoholysis it reviewed the alcoholysis process and equipment research and application statusthe of polyvinyl alcohol , and offered constructive opinions to the development of China's Polyvinyl Alcohol Industry .

同时从醇解过程着手简述了聚乙烯醇解工艺和醇解设备的研究和应用状况，并对我国聚乙烯醇行业的发展提出建设性的意见。

The influence of polymerization degree and alcoholysis degree of polyvinyl alcohol, the ratio of Span - 20 to Tween - 20, the amount of polyvinyl alcohol, the amount of water - soluble inhibitor, pretreatment and after - treatment processes and et al on the hydrophobic property and stability of the water -repellent is investigated.

研制了一种以聚乙烯醇、2种非离子表面活性剂——Span-20和Tween-20、水溶性缓蚀剂等为原料的水性憎水剂；考察了聚乙烯醇的聚合度和醇解度、2种非离子表面活性剂之间的配比、聚乙烯醇含量、乳化剂含量、水溶性缓蚀剂含量、预处理和后处理工序等因素对憎水剂憎水效果及稳定性的影响。

Polyvinyl alcohol can be used to produce vinylon,polyvinyl butyral, and polyvinyl formal.

聚乙烯醇可用于生产维纶、聚乙烯醇缩丁醛和聚乙烯醇缩甲醛。

On the above mentioned base, the metallized films of polyvinyl formal , polyvinyl butyral and polyethersulphone prepared by reduction were newly developed.

在系统地研究聚乙烯醇和聚丙烯腈/金属盐体系表面金属化的同时，又开发了聚乙烯醇缩甲醛、聚乙烯醇缩丁醛和聚醚砜/金属盐体系，并对这些材料表面金属化的条件和影响因素进行了详细研究。

China,calcium carbide, acetic acid,vinyl acetate,pentaerythrite,polyvinyl butyral resin,polyvinyl butyral film,"AVS"paint for interior and exterior walls,cement,carbonized bricks etc,over 40 chemicals and building materials.

主要有聚乙烯醇系列产品、聚乙酸乙烯酯乳液系列产品、电石、冰醋酸、醋酸乙烯、季戊四醇、聚乙烯醇缩丁醛树脂、聚乙烯醇缩丁醛胶片、AVS内外墙涂料、水泥、碳化砖等40多种化工产品和建材产品。

The company,covering 4.2 square km,has eleven branch and subsidiary companies,and 4,737 employees,it mainly produces polyvinyl alcohol series,polyvinyl acetate emulsion ( commonly called"bairuijiao"in China),calcium carbide, acetic acid,vinyl acetate,pentaerythrite,polyvinyl butyral resin,polyvinyl butyral film,"AVS"paint for interior and exterior walls,cement,carbonized bricks etc,over 40 chemicals and building materials.

主要有聚乙烯醇系列产品，聚乙酸乙烯酯乳液系列产品，电石，冰醋酸，醋酸乙烯，季戊四醇，聚乙烯醇缩丁醛树脂，聚乙烯醇缩丁醛胶片，AVS内外墙涂料，水泥，碳化砖等40多种化工产品和建材产品。

The main object of this research is to investigate synthesis of Cu23Cl Cu and CuO nanoparticles through electrospinning and heat-treated method The research is mainly focused on preparative parameter and the change of heat-treated temperature to form the nanoparticles inlaid in silicon fibers the shape and color change are dicussed First of all to prepare the Polyvinyl butyral and silica dioxide complex nanofiber by electrospinning and then to investigate different heat-treated temperature and reactive time to being an influence on the products The results detected by SEM XRD TEM EDS FTIR combined sol-gel process and electrospinning can prepare Polyvinyl butyral and silica complex nanofiber The experimental result is found when heat-treated temperature is 100~4750C it can produce Cu23Cl nanoparticles; Above 4750C~ 4900C it can produce Cu nanoparticles; Above 450~7000C it can produce CuO nanoparticles And the viscosity is lain between 20~40cp and the sol-gel process time is 3hr it can produce the thinner fibers The average diameter of the fibers are 107 88±21 01nm;Due to the nanoparticles inlaid in the silica fibers the thinner fibers can be inlaid the smaller nanoparticles so this is the result that the experiment is expected To calcine the complex fibers is to produce surface silica fibers contain Cu23Cl Cu and CuO nanoparticles due to surface plasma resonance it make the color of the fibers become yellowish green from light white green turn into the red nuclear finally As the experimental result to utilize sol-gel process combine electrospinning can produce porous silica fibers contain Cu23Cl Cu and CuO nanoparticles

本研究旨在探讨「利用放电纺丝和热处理法来合成Cu23Cl、Cu和CuO奈米粒」之研究，实验著重在制备参数与热处理温度变化对所形成的奈米粒镶嵌在二氧化矽纤维中的形态与颜色变化探讨。首先，利用放电纺丝法制备出聚乙烯醇缩丁醛及二氧化矽之奈米纤维，比较不同的热处理温度与反应时间的改变对产物生成产生影响，进而研究不同热处理温度和时间对生成奈米粒的影响。产物经由SEM、XRD、TEM、EDS和FTIR等仪器分析结果显示，结合溶胶-凝胶法(sol-gel process)和放电纺丝法可产生聚乙烯醇缩丁醛及二氧化矽复合奈米纤维。实验结果发现，若热处理温度在100~4750C下可得到Cu23Cl奈米粒，475~4900C 可得Cu奈米粒，450~7000C以上可得 CuO奈米粒。而黏度介於20~40cp间和溶胶-凝胶时间为3hr时，可产生直径比较细的纤维，纤维直径为107 88±21 01nm；且由於奈米金属颗粒镶嵌在二氧化矽纤维中，直径比较细的纤维，可以得到比较小的奈米金属颗粒，这与实验预期相符。而锻烧此复合物产生多孔的二氧化矽纤维并包含Cu23Cl、Cu和CuO奈米微粒时，由於表面电浆子共震关系，而使纤维颜色由淡白黄绿色变成黄绿色，再变红褐色。由实验结果得知，利用溶胶-凝胶法(sol-gel process)结合放电纺丝法和不同热处理温度，可产生Cu23Cl、Cu和CuO奈米粒镶嵌在二氧化矽纤维。

The polyvinyl acetate and polyvinyl alcohol used are ideal restoring materials obtained by numberless screening.

聚醋酸乙烯和聚乙烯醇是经过无数次筛选的理想修补材料。

The following was studied in this paper:(1) The adhesive strength of polyvinyl alcohol with different degree of polymerization and different degree of alcoholysis (2) The adhesive strength of polyvinyl acetals with different acetalization degree (3) Effects of polyvinyl acetate on adhesive strength of white glue when PVA or polyvinyl acetals was used as its protective colloid.

本文主要研究以下内容：(1)不同聚合度、醇解度聚乙烯醇溶液粘接强度；(2)不同缩醛度的聚乙烯醇缩醛溶液的粘接强度；(3)聚乙烯醇或聚乙烯醇缩甲醛为保护胶体时，聚醋酸乙烯酯乳液的粘接强度，以及研究白乳胶改性物，制备高粘度和高粘接强度的白乳胶。

Fourth, surface pressure - mean molecule area curves of nervonic and polyvinyl pyrrolidone at different molar fraction (0～1.0) were measured and analyzed.

第四，研究神经酸和聚乙烯吡咯烷酮(PVP，polyvinyl pyrrolidone)混合单分子膜在神经酸的摩尔分数0～1.0的表面压-平均分子面积曲线。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。