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New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene PolymerizationFacile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that:1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

本工作的新贡献如下:(1)、球形氯化镁负载后过渡金属催化荆催化乙烯聚合本文将配合物2,3-双(2,6-二异丙基苯亚胺)丁烷二溴化镍(1)和配合物2,6-二[1-(2,4,6-三甲基苯亚胺)乙基]吡啶二氯化铁(2)分别直接负载于经不同热脱醇温度处理的球形氯化镁载体上,研究了氯化镁载体的脱醇温度对负载化后过渡金属催化剂及其聚合物的影响,研究表明:1、通过对球形MgCl_2·2.56C_2H_5OH载体进行热脱醇处理,可以获得合适机械强度、较高比表面积和较高孔隙度的球形氯化镁载体;2、BET,XRD,IR,SEM,GPC和DSC研究表明,脱醇温度极大地影响负载后过渡金属催化剂的活性和聚合物的性能。

New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene Polymerization Facile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that: 1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

本工作的新贡献如下:(1)、球形氯化镁负载后过渡金属催化荆催化乙烯聚合本文将配合物2,3-双(2,6-二异丙基苯亚胺)丁烷二溴化镍(1)和配合物2,6-二[1-(2,4,6-三甲基苯亚胺)乙基]吡啶二氯化铁(2)分别直接负载于经不同热脱醇温度处理的球形氯化镁载体上,研究了氯化镁载体的脱醇温度对负载化后过渡金属催化剂及其聚合物的影响,研究表明: 1、通过对球形MgCl_2·2.56C_2H_5OH载体进行热脱醇处理,可以获得合适机械强度、较高比表面积和较高孔隙度的球形氯化镁载体; 2、BET,XRD,IR,SEM,GPC和DSC研究表明,脱醇温度极大地影响负载后过渡金属催化剂的活性和聚合物的性能。

The product was characterized by differential thermal analyzer and thermal gravimetry,Fourier transform-infrared spectrum,X-ray diffractionand transmission electron microscope.

运用差热—热重、傅立叶变换红外光谱、X射线衍射、透射电镜对生成LaCoO3的超细粉末进行了表征。

The morphology, composition, diameter, size and size distribution, differential thermal and weight loss of MoS2 particles were measured by X-ray diffraction, transmission electron microscopy equipped with an energy-dispersive X-ray spectrometer, Zetasizer analyzer and differential thermal and thermogravimetric analysis in air.

用X-射线衍射、透射电子显微镜、能谱、粒度分析仪以及差热-热失重分析等分析手段,考察了产物粒子的形貌、成分、尺寸及尺寸分布、差热-热重的情况。

Microstrucfure of the powder samples achieved such as crystallographic structure, grain size, particle morphology, element analysis and thermal decomposition were characterized by means of X-ray diffraction, transmission electron microscopy, electron diffraction, energy dispersion X-ray spectroscopy and differential thermal analyzer etc.

结果表明,所制备的钠米镍粉、镍铜及镍铜硼复合粉呈颗粒均匀的球形或类球形,粒径在40nm~60nm之间。采用DTA方法对添加了纳米粉的高氯酸铵、AP/HTPB推进剂热分解情况进行表征。

The Fe57-xCo18Nb4Al2Si4B15Smx(x=0-3) amorphous alloy ribbons were prepared byvacuum arc melting and melt spinning. The influences of Sm addition on the glass forming ability, thermal stability, crystallization behavior and magnetic properties of Fe57-xCo18Nb4Al2Si4B15Smx amorphous alloys were studied by X-ray diffraction, differential thermal analyzer and vibration sample magnetometer survey.

摘 要:采用真空电弧熔炼和真空熔融甩带法制备Fe57-xCo18Nb4Al2Si4B15Smx(x=0~3)非晶合金,借助X射线衍射、差热分析以及振动样品磁强计等手段研究稀土元素Sm对制备合金的非晶形成能力、非晶热稳定性、非晶晶化行为以及磁性能的影响。

The DTC is just limited by the thermal transition properties of the films, and is the function of the thermal diffusion constant.

LITV信号的衰减时间仅决定于薄膜材料的热传导性能,是薄膜热扩散系数的函数。

A 3ω method was developed for the simultaneous determination of thermal conductivity and thermal diffusivity of nanofluids.

提出了应用基于谐波探测技术的3ω法进行液体导热性能测量的方法。

This paper mainly studies on the thermal diffusivity and thermal conductivity by PTR method.

本文主要用光热辐射技术理论来研究材料的热扩散系数和热导率。

Dynamic mechanical analysis,mechanical properties and the thermal dilatability measurements were used to study the effects of SF content on dynamic mechanical properties,impact strength,bending strength,bending modulus,specific strength,specific modulus,wear resistance and thermal dilatability.

采用动态力学、力学性能、热膨胀性能等测定研究了剑麻纤维的加入量对复合材料的动态力学性能、冲击强度、弯曲强度、弯曲模量、比强度、比模量、耐磨性能、热膨胀性能的影响,用扫描电镜观察了材料冲击断面和磨损面的形态。

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