polyvinyl alcohol (pva)中文是什么意思

• 聚乙烯醇

• "polyvinyl"中文翻译    n.,adj. 聚乙烯化合物[基](的)。 polyvi ...
• "alcohol"中文翻译    n. 1.【化学】醇；乙醇，酒精。 2.含酒精饮料。 短 ...
• "pva"中文翻译     PVA ＝【化学】 1.polyvinyl ...
• "polyvinyl alcohol(pva) floccule" 中文翻译 :    聚乙烯醇絮状物
• "polyvinyl alcohol (pva) 17-99, floccule" 中文翻译 :    聚乙烯醇（絮状物）
• "polyvinyl alcohol" 中文翻译 :    聚孔烯醇; 聚乙烯醇 高分子聚合胶，属植物性胶体，可吸附深层毛孔中的污垢及粉刺; 聚乙烯基; 膜剂; 维纶
• "fully hydrolyzed polyvinyl alcohol" 中文翻译 :    全水解聚乙烯醇
• "isotactic polyvinyl alcohol" 中文翻译 :    全同聚乙烯醇
• "modified polyvinyl alcohol" 中文翻译 :    改性聚乙烯醇
• "polyvinyl alcohol fiber" 中文翻译 :    聚乙烯醇纤维
• "polyvinyl alcohol fibre" 中文翻译 :    聚乙稀醇纤维
• "polyvinyl alcohol filament yarn" 中文翻译 :    聚乙烯醇长丝
• "polyvinyl alcohol fixative" 中文翻译 :    聚乙烯醇固定液
• "polyvinyl alcohol floccule" 中文翻译 :    聚乙烯醇絮状物
• "polyvinyl alcohol foam" 中文翻译 :    聚乙烯醇泡沫
• "polyvinyl alcohol glue" 中文翻译 :    聚乙烯醇背胶
• "polyvinyl alcohol membrane" 中文翻译 :    聚乙烯乙醇膜
• "polyvinyl alcohol resins designationn" 中文翻译 :    聚乙烯醇树脂命名
• "polyvinyl alcohol resins specification" 中文翻译 :    聚乙烯醇树脂规格
• "cross linked polyvinyl alcohol film" 中文翻译 :    交联聚乙烯醇膜
• "polyvinyl alcohol cotton blended yarn" 中文翻译 :    维棉混纺纱
• "polyvinyl alcohol resins for fibre grade" 中文翻译 :    纤维级聚乙烯醇树脂
• "pva" 中文翻译 :     PVA ＝【化学】 1.polyvinyl acetate 聚醋酸乙烯酯。 2. polyvinyl alcohol 聚乙烯醇。
• "polyvinyl alcohol staple fibre spun yarn" 中文翻译 :    维纶纱
• "polyvinyl" 中文翻译 :    n.,adj. 聚乙烯化合物[基](的)。 polyvinyl alcohol 聚乙烯醇。 polyvinyl chloride 聚氯乙烯。 polyvinyl resin 聚乙烯(基类)树脂。

• The new usage of polyvinyl alcohol ( pva ) in many industrial fields in recent years are presented
  摘要介绍了近年来聚乙烯醇产品在各个工业领域中的新用途，说明这种化工原料仍有广泛的使用价值。
• This paper describes the new production and properties of ductile fiber reinforced cementitious composites ( dfrccs ) . this particular dfrcc contains polyvinyl alcohol ( pva ) fibers , employing low fiber volume fractions ( between 1 % and 2 % ) and high - strength and high elasticity modulus
  本文采用低掺量(纤维体积率为1 2 )的高强高弹聚乙烯醇纤维(简称pva纤维)进行了延性纤维增强水泥基材料( dfrccs )的研制与性能测定。
• The mechanism for optical storage in these materials has been attributed to a statistical reorientation of the azobenzene chromophors perpendicular to the polarization of the incident electric field of the pump laser beam . the photoinduced birefringence and holographic storage in methyl orange dyes ( mo ) doped polyvinyl alcohol ( pva ) films were reported firstly in this thesis . the relationship between the photoinduced birefringence and the dye content and pumping power was investigated by using the writing light of 532 nm ( double - frequency of nd : yag laser ) and the reading light of 632 . 8 nm
  本文研究了甲基橙( mo )偶氮苯染料掺杂聚乙烯醇( pva )薄膜的光致双折射和全息光存储特性，利用yag激光2倍频( 532nm )作为写入光， he ? ne激光( 632 . 8nm )作为读出光，研究含有不同染料浓度pva薄膜的光致双折射特性，探讨了光致双折射和泵浦光功率的关系，实现了全息光存储，所得光栅生长曲线包含快过程和慢过程，快过程以异构相位光栅的生长为主，慢过程以取向光栅的生长为主，对此实验结果本文给出了合理的理论解释。
• The present work indicates the organic nf membranes and the inorganic nf membranes all have shortages , so develop composite nf membranes that have low cost , mechanically strong and thermally / chemically - resistant , easy to cleanout and good performances is a very important task . in this paper , the preparation of inorganic - organic composite nf membranes were presented . this composite comprise a porous sio2 / al2o3 support substrate , the pore diameters of which ranging from 10 to 15 nm , this inorganic support substrate having a polymer membrane which comprises an polyvinyl alcohol ( pva ) or polyamide ( pa ) densely deposited on at least one of the face surfaces thereof , the structural porosity of such pva and pa membrane ranging from 3 to 5 nm
  本论文以开发无机?有机复合纳滤膜为出发点，首先在al _ 2o _ 3多孔微滤膜上利用溶胶?凝胶法制备sio _ 2 al _ 2o _ 3无机复合超滤膜作为无机?有机复合纳滤膜的基膜；选用聚乙烯醇和聚酰胺为表面功能层材料，分别探讨了以羟基丁二酸和磺基水杨酸为混合交联剂，采用浸涂法制备了聚乙烯醇sio _ 2 ? al _ 2o _ 3复合纳滤膜；以均苯二甲酰氯、哌嗪和二胺为单体，采用界面聚合法制备了聚酰胺sio _ 2 ? al _ 2o _ 3复合纳滤膜，并对影响膜性能的诸多因素进行系统研究。
• The polyvinyl alcohol ( pva ) in precursor can improve the porosity and make the aperture distribution narrower . so the gels were not easily crazing when drying . simultaneously the fluorescence intensity of the dyes increased as a result of the probabilities of radiationless transitions
  在先驱液中加入少量有机聚合物聚乙烯醇1 （ pva ）不仅改善了孔结构，使孔径分布窄，凝胶在干燥过程中不宜开d裂，而且使掺于其中的染料分子的迁移运动受到限制；降低了非辐射i跃迁的几率，提高了染料的荧光强度。
• The influence of retarder on the seaing time and ultimate strength of gypsum plaster was investigated in this paper . the experimental results indicate that the effect of single retarder , such as citric acid , is inferior to that of composite retarder which was made of blending citric acid with a few portland cement ( about 0 . 5 ? , by weight ) . the effect of different water - retention agents , such as polyvinyl alcohol ( pva ) , carboxymethyl cellulose ( cmc ) , and na - bentonite , etc . , was also studied , and the results demonstrate that by means of adding organic and inorganic water - retention agent simultaneously the water - retention of plastering slurry can obviously be improved . the optimal mix proportion of gypsum plaster suitable to finish coat of walls and ceilings of buildings has been got by use of factorial experiment with orthogonal array accounting for interactions between factors each other
  研究了分别以柠檬酸、柠檬酸与普通硅酸盐水泥复合物作缓凝剂,调节粉刷石膏的凝结时间,并对比2种缓凝体系对石膏抗折、抗压强度的影响.比较不同保水剂(聚乙烯醇、羧甲基纤维素)以及相同量的保水剂在不同工艺流程下保水效果上的区别.探索了有机保水剂和无机保水剂对粉刷石膏的保水性的影响.结果表明,柠檬酸与普通硅酸盐水泥的复合缓凝剂比单纯的柠檬酸更能有效地延缓建筑石膏的凝结,同时建筑石膏的抗折、抗压强度降低幅度减小