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河北省自然科学基金(B2004000093)

作品数:19 被引量:82H指数:6
相关作者:巴信武王素娟丁海涛李春子刁建志更多>>
相关机构:河北大学河北科技师范学院更多>>
发文基金:河北省自然科学基金国家自然科学基金河北省教育厅自然科学基金更多>>
相关领域:理学化学工程环境科学与工程一般工业技术更多>>

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19 条 记 录,以下是 1-10
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Statistical theory for hydrogen bonding fluid system of A_aD_d type (I): The geometrical phase transition被引量:6
2006年
The influence of hydrogen bonds on the physical and chemical properties of hydrogen bonding fluid system of AaDd type is investigated from two viewpoints by the principle of statistical mechanics. In detail, we proposed two new ways that can be used to obtain the equilibrium size distribution of the hydrogen bonding clusters, and derived the analytical expression of a relationship between the hydrogen bonding free energy and hydrogen bonding degree. For the nonlinear hydrogen bonding systems, it is shown that the sol-gel phase transition can take place under proper conditions, which is further proven to be a kind of geometrical phase transition rather than a thermodynamic one. Moreover, several problems associated with the geometrical phase transition and liquid-solid phase transition in nonlinear hydrogen bonding systems are discussed.
WANG Haijun1,2, HONG Xiaozhong3, GU Fang1 & BA Xinwu1 1. College of Chemistry and Environment Science, Hebei University, Baoding 071002, China
关键词:BONDINGEQUILIBRIUMGEOMETRICAL
Statistical theory for hydrogen bonding fluid system of A_aD_d type(Ⅲ):Equation of state and fluctuations
2007年
The equation of the state of the hydrogen bonding fluid system of AaDd type is studied by the principle of statistical mechanics. The influences of hydrogen bonds on the equation of state of the system are obtained based on the change in volume due to hydrogen bonds. Moreover,the number density fluc-tuations of both molecules and hydrogen bonds as well as their spatial correlation property are inves-tigated. Furthermore,an equation describing relation between the number density correlation function of "molecules-hydrogen bonds" and that of molecules and hydrogen bonds is derived. As application,taking the van der Waals hydrogen bonding fluid as an example,we considered the effect of hydrogen bonds on its relevant statistical properties.
WANG HaiJun1,2,GU Fang1,HONG XiaoZhong3 & BA XinWu1 1 College of Chemistry and Environment Science,Hebei University,Baoding 071002,China
关键词:BONDINGFLUCTUATION
AB_g型树枝状高分子生长物理缺陷的理论研究被引量:1
2006年
根据超支化高分子生长的空间位阻效应,通过利用简单的统计模型分析了ABg型反应体系在临界生长代数时形成缺陷结构的物理过程,进一步给出了临界反应代数与官能团之间的关系,扼要地讨论了超支化高分子的折光指数随生长代数的变化情况.
王云明王海军洪晓钟巴信武郎文彬
关键词:超支化高分子
Is the polydispersity exponent of the hyperbranched polymers the 3/2 or 5/2?
2006年
The number of the hyperbranched polymers in the system is investigated for the polymerization process to give the asymptotic form of the concentration of the n-mer. The polydispersity exponent is calculated, which coincides with that of the classical result. Finally, the asymptotic forms of the number, the weight and the z-average degrees of the polymerization were evaluated analytically to obtain polydispersity index, which is close to 1 as the reaction is quantitatively completed.
BA XinwuLIU YingWANG SujuanWANG Haijun
两亲性超支化聚(酰胺-酯)对染料相转移行为的研究被引量:3
2012年
利用苯甲酰氯对超支化聚(酰胺-酯)端羟基修饰,合成了一种新型的以超支化聚(酰胺-酯)为亲水核,苯环为疏水壳的两亲性超支化聚(酰胺-酯)。此两亲性超支化聚合物在0.125~0.5g/L的浓度范围内能够以单分子胶束形式将甲基橙(MO)从水相转移到二氯甲烷相,转移是个动态平衡过程,呈现前快后慢的趋势,22h后转移量达到95%,转移后的甲基橙也可以被可逆释放到二氯甲烷相。此外,对甲基橙和甲基蓝(MB)的双染料转移,表明少量甲基蓝分子的存在可以使甲基橙的转移量大大增加,起到了协同转移作用。
王素娟李文亮白利斌巴信武
关键词:相转移甲基橙甲基蓝
Statistical theory for hydrogen bonding fluid system of A_aD_d type(II):Properties of hydrogen bonding networks
2007年
Making use of the invariant property of the equilibrium size distribution of the hydrogen bonding clus- ters formed in hydrogen bonding system of AaDd type,the analytical expressions of the free energy in pregel and postgel regimes are obtained.Then the gel free energy and the scaling behavior of the number of hydrogen bonds in gel phase near the critical point are investigated to give the corre- sponding scaling exponents and scaling law.Meanwhile,some properties of intermolecular and in- tramolecular hydrogen bonds in the system,sol and gel phases are discussed.As a result,the explicit relationship between the number of intramolecular hydrogen bonds and hydrogen bonding degree is obtained.
WANG HaiJunHONG XiaoZhongGU FangBA XinWu
关键词:BONDINGGELSCALINGLAW
AB_3型超支化聚(酰胺-酯)的合成及缩聚动力学研究被引量:16
2004年
采用丁二酸酐、三羟甲基氨基甲烷为主要原料 ,在冰水浴条件下 ,合成AB3型单体 ,然后进行熔融缩聚制得超支化聚 (酰胺 酯 ) ,没有出现凝胶现象 .采用Fourier变换红外谱仪 (FTIR)、粘度测试、端基分析等方法对其结构、特性粘数进行了表征 .同时对AB3型超支化聚 (酰胺 酯 )的缩聚反应动力学进行了研究 ,得出了130℃、14 0℃和 15 0℃时的缩聚反应速率常数 ,并进一步得出了缩聚反应活化能 .实验结果证明缩聚过程为自催化过程 。
王素娟巴信武赵宝辉张书文侯文龙
关键词:活化能速率常数丁二酸酐
阳离子聚丙烯酰胺-TiO_2复配絮凝剂的合成及性能被引量:4
2009年
以甲基丙烯酰氧乙基三甲基氯化铵(DMC)和丙烯酰胺(AM)为单体,K2S2O8-NaHSO3为引发剂,采用水溶液聚合法合成了阳离子聚丙烯酰胺P(DMC-AM),将表面处理后的纳米TiO2与P(DMC-AM)复配,得到P(DMC-AM)-TiO2复配絮凝剂。考察了原料配比、反应条件对P(DMC-AM)黏度的影响,结果表明:在m(DMC)∶m(AM)=0.18、引发剂加入量为0.5%(质量分数,下同)、聚合反应时间3h、聚合溶液pH=4.0条件下,P(DMC-AM)絮凝剂的特性黏度最佳;纳米TiO2加入量为5%时,复配絮凝剂对酸性黑10B染料模拟废水的脱色性能最好。
姚子华仇满德巴信武王继英翟永清杨妍
关键词:二氧化钛阳离子聚丙烯酰胺絮凝剂染料
超支化聚合物在炭黑表面接枝改性的研究被引量:13
2008年
以羟甲基化炭黑为中心核,利用其活性羟基与AB3型单体进行缩聚反应,在炭黑的表面原位接枝超支化聚合物。实验表明,炭黑表面接枝超支化聚合物后,粒子间聚集作用减弱,在乙醇中的分散性和稳定性提高,且对PVC有很好的增强、增韧作用。
夏俊义巴信武王素娟王敏捷
关键词:炭黑表面改性接枝
PP/PVC/PP-HBP共混体系研究被引量:9
2005年
研究了聚丙烯接枝超支化聚(酰胺-酯)(PP-HBP)对聚丙烯/聚氯乙烯(PP/PVC)共混体系力学性能的影响。结果表明,在PP/PVC(质量比为70/30)共混体系中加入5份PP-HBP时,共混物拉伸强度和冲击强度均出现最大值。扫描电子显微镜(SEM)研究结果证明,PP-HBP增强了PP/PVC的界面粘结作用,减小了共混体系的相分离程度。
刁建志巴信武丁海涛李春子
关键词:PP扫描电子显微镜共混体系粘结作用超支化共混物
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