hydroxyl number 中文意思是什麼

hydroxyl number 解釋
羥基數
  • hydroxyl : n. 【化學】羥基。
  • number : n 1 數；數字；〈pl 〉算術。2 （汽車等的）號碼；第…，第…卷，第…期〈通常略作 No （復數 Nos ），用於...
  1. Polyether polyols - determination of hydroxyl number

    聚醚多元醇中羥值測定方法
  2. Palyether polyols - determination of hydroxyl number

    聚醚多元醇中羥值測定方法
  3. Green tea contains a number of flavonols with the basic structure specific flavonols found in tea include myricetin ( hydroxyls at carbon 3 ', 4 ', and 5 ' ), quercetin ( hydroxyls at positions 3 ' and 4 ' ), and kaempferol ( hydroxyl at position 4 ' ), and their glycosides

    綠茶含有一些黃酮醇，其基本化學結構為:茶中特有的黃酮醇有楊梅黃酮（ 3 ' 、 4 ' 、 5 '碳位上羥基化） 、豕草花粉苷（ 3 '和4 '碳位上羥基化） ，莰非醇（ 4 '碳位上羥基化） ，以及它們的糖苷物。
  4. ( 3 ) volume shrinkage of composite decreases greatly with wpu increasing, even can arrive a negative number, but thermal stability is still good. ( 4 ) toughening mechanism is that : the formation of high molecular linear amino formate construct is the toughening reason ; hydroxyl - terminated pu - prepolymer and pf react to produce chemical bond effect which participate cure ; carboxyl - terminated pu - prepolymer and pf form semi - ipn which make toughened pf occur maximum

    （ 4 ）通過紅外光譜對pf / pu共混物分子結構進行的定性分析、以及掃描電鏡對沖擊斷面形貌進行的分析，可證明聚氨酯預聚物增韌酚醛樹脂的機理是：兩個體系都是由於高分子量的線形氨基甲酸酯結構而增韌；端羥基pu與pf在共固化中產生化學鍵效應，參與pf的固化；而端羧基pu則與pf形成半互穿網路而增韌。
  5. The studies expressed that the tensile - strength declined with the growth of dose rate after the radiation treatment, and at the same time, the gel content had extreme value with the change of the dose rate. the surface of uhmwpe fibers showed some irregular micro - pits and dents after radiation treatment, narnely rough degree increasing. their number and deepness increased with increase of dose. and this phenomenon is the most obvious when the dose rate was 8. 5kgy / s and the dose was 400kgy. at the same time some containing oxygen groups, including hydroxyl group, carbonyl group and carboxyl group, were introduced into the fiber surface which was exposed to the air

    研究表明， uhmwpe纖維經電子束輻照處理后，纖維的拉伸斷裂強度隨劑量率的增加呈下降趨勢，凝膠含量隨著劑量率的變化存在極值。纖維表面出現了不規則的微裂紋和凹痕，隨著劑量的增大，電子束對纖維表面的刻蝕程度增加，在本研究中以劑量為400kgy劑量率為8 . 5kgy s時刻蝕效應最為明顯。同時，在空氣中進行輻照時，纖維表面被引入了一些含氧基團，包括羥基、羰基和羧基。
  6. Standard practice for polyurethane raw materials : determining hydroxyl number of polyols by near infrared spectroscopy

    聚氨基甲酸乙酯原料的標準實施規范:利用近紅外譜法測定多元醇中的羥基值
  7. Practice for polyurethane raw materials : determining hydroxyl number of polyols by near infrared spectroscopy

    聚氨酯生膠材料慣例:用近遠紅外光譜測量儀測定聚合物溶膠的羥基值
  8. Polyglycols for industrial use. determination of hydroxyl number. phthalic anhydride esterification method

    工業用聚乙二醇.羥基數值的測定.鄰苯二甲酸酐酯化法
  9. Plastics - polyols for use in the production of polyurethane - determination of hydroxyl number

    塑料製品.聚氨酯生產用多元醇.羥基數值測定
  10. Economy ? series of guar gums are absorbed very rapidly on the cellulose fibres owing to their structural similarity with cellulose and in addition they carry a large number of hydroxyl groups, suitable for the formation of hydrogen bonds

    這里的瓜爾膠系列產品都能很快地被纖維細胞所吸收，是由於它們的細胞結構和纖維細胞非常相像，其次它們帶有大量的羥基團適合氫鍵的形成。
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