極性基團 的英文怎麼說

中文拼音 [jíxìngjītuán]
極性基團 英文
polar group
  • 極 : i 名詞1 （頂點; 盡頭） the utmost point; extreme 2 （地球的南北兩端; 磁體的兩端; 電源或電器上電流...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 團 : Ⅰ名詞1 （團子） dumpling 2 （成球形的東西） sth shaped like a ball 3 （工作或活動的集體） group; ...
  1. Consequently, with increasing mmt content, the tensile strength and young ' s modulus of hdpe - g - aa / mmt nanocomposites increased, while that of hdpe / mmt composites decreased. moreover, the addition of mmt to hdpe - g - aa decreased the melting temperature and the degree of crystallization of the matrix. these changes may be attributed to high interfacial adhesion between hdpe - g - aa matrix and exfoliated clay, which reduces the mobility of crystallizable pe chain segments, and subsequently reduces the crystallization ability

    研究結果表明： mmt在hdpe中不能達到納米級分散，而在hdpe - g - aa中， mmt能以插層型利剝離型的結構存在，這主要是由於極性的丙烯酸接枝在hdpe上提高了後者的極性，而且能與mmt上的活性基團進行化學反應，從而提高了pe鏈進入mmt層間的可能性，使mmt在基體中達到納米級分散。
  2. As to the high - density polyethylene, two strategies were performed : ( 1 ) after being modified by grafting polar groups on its backbone, polyethylene and organic montmorillonite were melt mixed directly, which could obtain the polyethylene / montmorillonite nanocomposites. the effect of groups grafted on the backbone on the efficiency of intercalation was investigated in this paper ; ( 2 ) choosing the grafters obtained in this experiment as the compatilizers, polyethylene / montmorillonite nanocomposites had also been prepared by melt mixing the polyethylene, grafter and organic montmorillonite. the difference of grafters and sequence of mixing on the intercalation result had also been analyzed

    對于高密度聚乙烯，採用以下兩種思路進行： （ 1 ）對聚乙烯首先進行功能化改性，使聚乙烯分子鏈上接枝上不同的極性基團，將改性后的聚乙烯再同有機蒙脫土直接熔融復合，成功的制備了聚乙烯蒙脫土納米復合材料，並考察了接枝到聚乙烯主鏈上基團的不同對最終插層效果的影響； （ 2 ）選用制得的接枝物作為相容劑，將聚乙烯，接枝物，有機蒙脫土三者熔融復合，也可以得到聚乙烯蒙脫土納米復合材料，並對選用不同的接枝物作為相容劑以及復合順序對最終插層效果的影響加以分析。
  3. The wet plating method permits to improve the adhesion of plating layers by treating the surface of polymers with an acid to generate the concavo - convex and forming the polar functional groups ( see, metal surface compendium, plastic plating techniques, page 13 )

    濕鍍方法可以改進鍍層的粘附能力，其方法是用酸處理聚合物表面，以產生凸凹並形成極性基團。
  4. The results indicated that the dimension, shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c, but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased, melting temperature and decomposition temperature decreased, in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o, c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests. the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big. this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60, 30 : 30 - 40 and 60 : 15 - 30 respectively, the friction coefficient was relatively small. the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time, the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle, lubricant transfer film could be formed on metal surface, thus direct contact between the surface of metal friction pair rings was reduced. their working life was elongated extremely ; there was mainly much graphite, a little ptff, moo3, feso4, cus and so on in lubricant transfer film

    試驗結果表明：所選原料的尺寸、形狀及純度可滿足固體潤滑劑的性能要求；聚四氟乙烯樹脂熱分解溫度超過400 ，但在ptfe中加入無機填料會使復合材料吸水率提高，熔融溫度及分解溫度降低，且伴有氧化分解反應；碳纖維表面含有c = o及c - o - c等極性基團，有利於提高其與其它組分的相容性，提高層間剪切強度；均勻設計試驗方法能夠用較少的試驗次數找出配方與摩擦性能間的關系，擬合曲線基本能表示各配方的摩擦系數發展趨勢；配方中不加銅粉或不加石墨，其摩擦系數均較高，說明銅粉和石墨應該配合使用；當銅粉15份、石墨60份時，銅粉30份、石墨30 - 40份時，銅粉60 、石墨15 - 30份時，摩擦系數均具有較低值；純聚四氟乙烯樹脂在空氣冷卻時結晶度最大，磨損量也是三者中最大的；同時，固體潤滑劑試樣在空氣冷卻時的磨損量也是三者中最大的：不論是固體潤滑劑與45 #鋼軸配副或是固體潤滑劑鑲嵌入銅套后與gcr15鋼軸配副，在金屬表面均可形成潤滑轉移膜，從而減少金屬摩擦副表面間的直接接觸，大大延長其使用壽命;轉移膜中主要含有較多的石墨、少量聚四氟乙烯、 moo 。
  5. The synthesis of modified polyolefin which grafted polar groups ， effects on interfacial adhesion of glassfiber reinforced polyolefin composite systerm and applications in glass fiber sizing were introduced in this paper

    本文介紹了接枝極性基團的改性聚烯烴的合成及其對玻璃纖維增強聚烯烴復合體系界面結合的影響以及在玻璃纖維浸潤劑配方中的應用。
  6. An amphiphilic compound has a polar head which dissolves in water ( hydrophilic ) and a water insoluble organic tail

    雙親分子有一個能溶解在水中的極性基團和一個疏水尾。
  7. The mechanism of the surface change has beenstudied by the xps, sem, contract anglemeasurements. we discuss the roles of the tree main fators playing in the fiber - resin adhesion, and their relation to plasma parameters. the three main factors ars the key mechanical effects, the chemical bonding effcts and nonpolar dispersion force

    表面粘接性能改善的原因是：由表面引入的多種含氧基團引起的化學鍵力和界面非極性分子色散力，由表面刻蝕坑引起的界面機械鉸鏈力。它們對界面的粘接強度的貢獻隨參數而改變。
  8. The results exhibit that this method not only guarantees the uniform dispersion of carbon nano tubes in coating but also increases polarized molecular group on the surface of carbon nano tubes. it is helpful to roundly improve the performance of coating. the effects of dosage of

    實驗驗證運用這種處理方法不僅可以保證碳納米管比較均勻地分散在塗層中，而且還使碳納米管表面具有更多的極性基團，有利於導電防腐塗層性能的綜合改善提高。
  9. The experiment result discovered the grafting effect of crylic acid and acrylamide were obvious which can be proved by the sem photoes. by the ft - ir testing of the grafted uhmwpe fabric, we discovered that some new polar groups were introduced to the surface. then by the dynamic wetting experiment of the grafted uhmwpe fabric, we concluded that the wetting time was a parabola relation with the graft ratio and the wetting time of the grafted uhmwpe fabric was less than that of untreated fabric. the results showed that after the coradiation grafting, uhmwpe fiber ' s surficial nonreactivity could be improved effectively

    通過對接枝uhmwpe織物的紅外光譜分析，發現其表面引入了許多新的極性基團。最後運用了纖維動態浸潤性分析了接枝后的效果，得到所測浸潤穩定時間與接枝率成拋物線關系，而且接枝樣品的浸潤穩定時間都比未處理樣品的浸潤穩定時間小些，這說明了共輻照接枝的方法可以有效地改善uhmwpe纖維表面惰性，達到uhmwpe纖維表面改性的目的。
  10. In the packing of amphiphilic molecules, like units of the molecules interact with each other, i. e., the polar units associate with each other ; likewise, nonpolar unites associate to form hydrocarbon layers in the lamellar packing

    在層狀相中雙親分子的堆積類似於分子單元間的相互作用，即極性基團與極性基團締合形成親水層，而非極性基團之間締合形成疏水層。
  11. In order to explain the phenmena, two supposes of " hole " and " polar - group rupture " are proposed, according to the tests of ir, density, refractive index, conductor volume resistivity, the aging model of pmma is confirmed likely

    通過其他實驗（如紅外光譜、測量密度、測量折射率、測量體積電阻率）的相互對比，基本上肯定了有機玻璃「極性基團斷裂」的熱老化模型。
  12. Ag + and fe2 + caused the fluorescence of trp residues in g6pd quenched ; mg2 + and edta made fluorescence intensity of g6pd increased, this indicates that they caused trp residues wrapped and came to the inner core and located in the hydrophobic area ; while zn2 + or mn2 + made fluorescence intensity of g6pd decreased, this indicates that they made the conformation of g6pd relaxed and chromophores exposed to polarity environments. in native condition and in the far circular dichroic ( cd ) region, g6pd exhibited two characteristic negative band centered at 208nm and 222nm respectively, thus it is estimated to contain about 41. 2 % a - helix, 20. 6 % - pleated sheet and 38. 2 % random coil and turn

    Ag ~ +和fe ~ （ 2 + ）引起色氨酸（ trp ）殘基的熒光淬滅； mg ~ （ 2 + ）和edta均使g6pd的熒光強度增強，說明它們使trp殘基重新包裹在分子內部而處于疏水的微環境中； zn ~ （ 2 + ）和mn ~ （ 2 + ）均使g6pd的熒光強度變小，說明它們使酶分子構象變得疏鬆，原來處在分子內部的發色團暴露在極性環境中。
  13. Study on flotation reagent of multi - non - polar radical compound

    含復式非極性基團浮選藥劑研究
  14. That means pmma has changed from polar polymer to non - polar polymer

    對此現象的解釋機理提出了「孔洞」與「極性基團斷裂」兩種假設。
  15. The dispersion of mmt and the properties of composites were basically determined by the nature of organo - mmt and the polarity of the polymer chains. the intercalated nanocomposites could be explained in terms of the formation of " ladder " structure due to the excessive polar groups on the polymer chains which adhere adjacent silicate sheets

    插層高分子鏈的極性基團含量要適宜；否則，極性基團將相鄰片層「膠粘」形成穩定的「梯形」結構，導致高分子鏈插層受阻，易形成插層型納米復合材料。
  16. The mechanisms of laser - induced blood fluorescence spectra and the spectra deriving from the fluorophores on the erythrocyte membrane are presented. on the other hand, the lower intensity of the hemoglobin fluorescence spectra is due to the fluorescence quenching from resonance energy transfer between the fluorophores in hemoglobin with ambient

    因此提出了激光誘導血細胞產生熒光光譜的機理；並提出激光誘導血液產生的熒光光譜主要是紅細胞的貢獻，其中對紅細胞產生的熒光光譜作主要貢獻的是其細胞膜上的色素基團、雙極性的磷脂等生物大分子中的熒光團。
  17. Silylate - terminated polyurethanes with built - in hydrophilic sites were synthesized. when the polymer is dispersed in water, the silane alkoxy end - groups of the polymer undergo hydrolysis, followed by condensation to form a stable cross - linked aqueous dispersion. tem studies indicated that with more incorporation of hydrophilic sites, the particle size of the dispersion decreased. it was also found that the film property depended on the particle size when the crosslinking density in particels was much higher. the average molecular weight of the elastically effective network chain mc measured by swelling experiments shows fairly good agreement with the theoretical value of mc. it was also found that the cross - linking density of the casting film may increase during the film formation and drying process

    將硅氧烷封端的含親水基團的線性聚氨酯預聚體分散於水中，獲得穩定的聚氨酯分散體.由於硅氧基團水解、縮合，在分散體粒子內產生擴鏈交聯反應，生成了交聯水基聚氨酯分散體.透射電子顯微鏡研究表明分散體粒徑小、分佈寬.掃描電子顯微鏡研究了成膜結構及成膜性能與粒徑的關系.溶脹實驗計算獲得的兩交聯點之間的平均分子量與理論平均分子量相符.研究還發現此分散體膜在乾燥過程中可進一步交聯.膜的水溶脹及機械性能表明，此分散體具有極大的工業應用價值
  18. This is because they have inclusive between the polar groups of nylon and organo - mmt ( ommt ). however, pp is a kind of non - polar polymer with mmt being difficult to realize complete intercalation and exfoliation. therefore, the domestic research about the pp / mmt nanocomposites were still little

    這是由於尼龍的極性基團與有機化蒙脫土的極性基團之間具有相容性，而聚丙烯（ pp ）是一種非極性的聚合物，與蒙脫土不易實現完全的插層剝離，因此國內關于pp蒙脫土納米復合材料的研究還鮮有報道。
  19. By mixing with bioactive fillers, such as hydroxyapatite ( ha ), a bony bond can be established on the interface between the composite material and the host bone. it is considered that a higher interfacial strength resulted from the chemical bonding can prevent the aseptic loosening

    其表面的羥基容易導致彼此之間以氫鍵產生團聚； ha是一種極性的、親水的物質，在弱極性的有機母相中，將產生二次團聚，很難用物理方法解聚。
  20. A mechanism that interprets this phenomenon was proposed as follows : the adsorbents can interact with phospholipid of ldl through calcium ion cross - linking of the phospholipid phosphate groups of ldl and the carboxyl groups of sde ligands. on the other hand, the electrostatic interaction between the positive charge of the phospholipid choline nitrogen of ldl and the negative charge of carboxyl groups of sde ligands is enhanced by the calcium cross - linking of the phosphate groups of neighboring phospholipids in ldl

    其可能的原因是：在吸附體系中如存在大量的cay ，一方面ca可以作為橋梁連接ldl所含磷脂極性頭部的磷酸基團和吸附微珠配體上的孩基；另一方面又可交聯相鄰磷脂間的磷酸基團，從而促進ldl所含磷脂極性頭部的膽堿n 」與配體竣基的相互作用。
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