羟基胺
- 与 羟基胺 相关的网络例句 [注:此内容来源于网络,仅供参考]
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In this report, half-esterification between these pendent hydroxyl groups of hydroxyl-PU and maleic anhydride could lead to new pendent groups, carboxylic groups. These highly polar carboxylic groups in the side chain of PU could play the role of internal emulsifier. They had self-dissociation ability in the water or were neutralized first by appropriate amount of base. Then, PU bearing carboxylic group could dispersed steadily in the water, named aqueous-based polyurethane dispersion.
在本论文中,利用原来亲油性Hydroxyl PU主链段上悬挂的羟基经由与琥珀酸酐的半酯化(Half-esterification Reaction)反应后,使PU在侧链上悬挂具有强极性的羧酸基,其可作为聚胺酯分子中的内乳化剂,羧酸基能在水相中自身解离产生离子或加入适量碱使之中合,使聚氨酯高分子能够稳定分散於水中,即所谓水性PU分散液(Aqueous-based Polyurethane Dispersion)。
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The invention adopts halogen acetylized crosslinked polystyrene resin and hydroxybenzyl alcohol as the raw material, and the solid phase synthesis carrier with hydroxymethyl as the active group is synthesized through the joint catalysis of N, N-dimethyl formamide used as the reaction solvent, inorganic base and phase-transfer catalyst.
本发明采用卤乙酰化交联聚苯乙烯树脂和对羟基苯甲醇为原料,在以N,N-二甲基甲酰胺为反应溶剂、无机碱及相转移催化剂的共同催化下合成了一种以羟甲基为活性基团的固相合成载体。
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Infrared, ultraviolet, and mass spectrometry Gaoxiaoyexiang tests showed that benzene p rosin in neighbouring seats husband alkali metal objects with catalytic, the oxide containing hydroxy generated, ethylene, or a functional group, such as the Food oxide product.
红外、紫外、高效液相色谱和质谱测试表明,松香在邻苯二胺席夫碱金属配合物的催化下,氧化生成了含羟基、环氧基、过氧基等官能团的氧化产物。
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The proportion of the phase transfer catalyst and tertiary amine are usually in the range of about 1-5 and about 0.01-5.0 mole percent, respectively, based on total dihydroxyaromatic compound and dicarboxylic acid employed. In the second phosgenation step, the pH is raised to at least 10 and a stoichiometric phosgene excess of at least 5% is introduced.
相转移催化剂和叔胺的比例以二羟基芳族化合物和二羧酸的总量为基础计通常分别在约1―5和0.01―5.0摩尔百分数的范围内,在第二步光气化步骤中,pH值升高到至少约10,并导入超过化学计量约至少5wt%的光气。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。