IR study on hydrogen bonding in epoxy resin-silica nanocomposites

The chemical and physical interactions between ingredients in composites play an important role in the improvement of service properties. The nucleophilic addition between polymer and isophoron diisocyanate molecules was monitored by FT-IR technique. The intensity loss of isocyanate absorption band in conjunction with the intensity growth of carboxyl absorption band indicates the progress of reaction. FT-IR spectroscopy was also adopted to examine the intermolecular hydrogen bonding of epoxy resin with silica as well as intramolecular one within polymer matrix. The vibration frequency of carboxyl group (-C=O) and hydroxyl group (-OH) shift from 1736cm^-1to 1728 cm^-1and 3420 cm^-1to 3414 cm^-1 respectively, indicating the occurrence of hydrogen bonding between -C=O and -OH. The vibration frequency of Si-OH moves from 3435 cm^-1 to 3414 cm-1, suggesting the involvement of silica. Whereas the vibration frequency of pending –OH in polymer chain moves from 3435 cm^-1to 3420 cm^-1or 3414cm^-1, proposing this kind of interaction can also happen within polymer matrix.     

IR study on hydrogen bonding in epoxy resin–silica nanocomposites

The chemical and physical interactions between ingredients in composites play an important role in the improvement of service properties. The nucleophilic addition between polymer and isophoron diisocyanate molecules was monitored by FT-IR technique. The intensity loss of isocyanate absorption band in conjunction with the intensity growth of carboxyl absorption band indicates the progress of reaction. FT-IR spectroscopy was also adopted to examine the intermolecular hydrogen bonding of epoxy resin with silica as well as intramolecular one within polymer matrix. The vibration frequency of carboxyl group （-C=O） and hydroxyl group （-OH） shifts from 1736 to 1728 cm^-1and 3420 to 3414 cm^-1, respectively, indicating the occurrence of hydrogen bonding between -C=O and -OH. The vibration frequency of Si-OH moves from 3435 to 3414 cm^-1, suggesting the involvement of silica. Whereas the vibration frequency of pending -OH in polymer chain moves from 3435 to 3420 cm^-1 or 3414 cm^-1, proposing that this kind of interaction can also happen within polymer matrix.     

丙烯酸改性邻甲酚醛环氧树脂的研究

目的合成丙烯酸改性邻甲酚醛环氧树脂。方法研究反应温度、催化剂种类和反应时间对丙烯酸转化率的影响。结果在烯丙基／环氧基的摩尔比为0．30：1时,温度控制在95℃,采用N,N-二甲基苯胺作为催化剂（用量为反应物的1．00％）,反应3h后,丙烯酸转化率可达到98．80％。结论控制适当的反应条件,丙烯酸可以达到较高水平的转化率。     

环己烯合成实验绿色化教学的实践

实现了环己烯合成实验的绿色化和半微型化。采用732型强酸性阳离子交换树脂催化环己醇脱水来制备环己烯,避免了用浓硫酸或浓磷酸催化造成的环境污染,提高了产率,而且催化剂可以重复使用。既强化了学生的环保意识,又使学生掌握了绿色化学的实验技术。     

电子ERP沙盘训练系统设计与实现

在对实物ERP沙盘实战训练教学系统进行研究的基础上,以实物ERP沙盘和电子ERP沙盘合理结合应用来提高教学效果为出发点,对电子ERP沙盘的需求进行了分析,给出了系统设计方案,并应用Delphi7开发工具和SQL server数据库实现了该系统。该系统和实物ERP系统合理结合应用能够最大程度上解决实物ERP沙盘模拟训练过程存在问题。     

Stratigraphic Framework and Microfacies of the Triassic Lower Karamay Formation in Districts I,III, NW Junggar,China

The Triassic Lower Karamay Formation (T2k1) is one of the main oil-bearing strati-graphic units in the northwestern margin of Junggar Basin (NW Junggar), China. Based on an inte-grated investigation of...     

聚合诱导相分离法制备纳米Fe掺杂多孔炭

以2130酚醛树脂为碳质前驱体,乙二醇为溶剂,苯磺酰氯为催化剂,纳米单质Fe粒子为掺杂剂,通过聚合诱导相分离热解法制备了掺Fe多孔炭单体,主要分析了Fe对前驱体溶液和多孔炭形态的影响。结果表明:纳米Fe粒子使前驱体溶液的pH值降低,溶液开始凝胶的时间增长,不同酚醛树脂含量下纳米Fe掺杂多孔炭的微结构及性能具有明显差异。Fe主要化合态存在于FeS和C48H44Fe14.01N15O35.68中。     

尾矿砂对水泥胶砂性能影响的试验

将尾矿砂以不同比例代替天然砂,研究其对水泥胶砂性能的影响。试验结果表明,尾矿砂的掺入能够满足水泥胶砂流动度和强度的要求,与天然砂相比,掺加尾矿砂可以提高水泥胶砂的流动度,并使水泥胶砂3d抗折强度和抗压强度略有降低,但可以提高水泥胶砂28d抗折强度和抗压强度。     

产水气井井筒携砂机制及携砂能力评价试验与应用

对垂直井筒不同水气比和含砂体积分数下的气水砂三相流动机制及气水携砂能力进行系统的试验研究。通过试验得到单相气体携砂和气水携砂临界流速与砂粒径的定量关系和规律。根据试验数据揭示的气液携砂机制,建立不产水和产水气井的临界携砂流速模型,用于预测给定生产条件下的携砂条件和携砂能力,并提出考虑井筒携砂的新型气井综合协调曲线用于实际气井工况分析和制度调整。结果表明:一旦气井见水,气井携砂能力将比不产水条件下严重降低,气体流速和水气比是控制携砂动态的主要因素;随着水气比从零开始升高,流型依次为无携砂现象的泥状流、具有携砂能力的环雾流、段塞流,以及其他相同水气比条件下的气水两相流型;气液两相流要达到携砂条件,气体流速必须达到携液流速,并且液相流速要达到基本的单相液体携砂条件。     

深层砂泥岩薄互层的地震识别方法

深层砂泥岩薄互层油气藏是一类典型的低孔、低渗型油气藏,储层一般具有埋藏深、横向变化快、深层物性差的特点。利用常规的薄层定量描述方法只能识别地层厚度不小于λ／4的孤立薄层,很难实现精细解释。为此,采用正-反演联合预测技术,通过建立符合地下实际情况的的地球物理模型,从正演角度分析目的层的地震波场特征;同时对正演结果进行模型反演,定量分析反演砂体的横向及纵向展布特征。结果表明这种基于模型正演的地震识别方法既能够发挥地震资料在地层横向展布上的优势,又能够提高纵向上的解释精度,为识别前梨园地区深层砂、泥岩互层结构的隐蔽性储层提供参考。