THE INFLUENCE OF DRAWING CONDITIONS OF PET POY ON STRUCTURE AND PROPERTY OF THE FIBER

Drawing tests upon PET POY have been made by using dynamic thermal stress analyser,which show that the dynamic thermal stress of fiber is readily affected by drawing conditions. Aseries of samples have been obtained under different drawing velocities, drawing temperatures anddraw ratios. The variations of structural factors of fiber such as the orientation, crystallinity,crystallite size and the thermal shrinkage have been measured. It is proved through experimentsthat the thermal shrinkage(Y) of the drawn fiber of PET POY is influenced by the orientation (rep-resented by sonic velocity x_1) and crystallinity (x_2) of the fiber. The quantitative relationship is es-tablished using the binary regression method: Y=10.2246+2.2030x_1-26.2670x_2 The mechanical properties such as tenacity, elongation, yield stress, initial modulus and the te-nacity at 10% elongation, etc. have also been measured. The relations between the tenacity at 10%elongation (D) and drawing velocity(V), draw ratio (DR), drawing temperature (T), and sonic ve-locity and crystallinity have been obtained using a method of mathematical statistics: D=4.594-0.009 6V , D=-8.937+7.170DR, D=2.866+0.00629T, D=-7.34+2.866x_1+6.314x_2 These equations fit well with data from the experiments. This work will be benefical to the control of quality of products and the development of newproducts.     

四苯基卟啉二酸H4TPP^2＋的共振Raman光谱研究

本文研究了四苯基卟啉二酸H_4TPP~(2 )在固体和溶液状态下的共振Raman光谱。并结合红外光谱指出H_4TPP~(2 )分子可能存在对称中心。退偏振比测量发现H_4TPP~(2 )有两个反常退偏带。H_4TPP~(2 )分子近似具有D_(14)对称性。     

异种钢接头中氢扩散行为及冷裂纹特征

本文采用氚自射线照相法及接头充氢后释放规律的观察，研究了用Ｃｒ２０Ｎｉ１０Ｍｎ６型焊条焊接珠光体类钢时氢的扩散及分布规律。利用高碳钢淬火试样及淬火后充氢试样的拉伸试验，研究了高碳钢淬硬组织对氢和应力的敏感性。探讨了Ｃｒ２０Ｎｉ１０Ｍｎ６／高碳钢接头中不同部位形成裂纹的性质、产生原因和防止措施。所得结论，为正确选用焊条及制定高碳钢的焊接工艺提供了试验和理论依据。     

稀土与混合配体配合物的研究——Ⅵ.2—羟基—3—萘甲酸(H_2A)、邻菲咯啉(Phen)与稀土(RE)三元固体配合物的合成及性质

本文报道了稀土与2—羟基—3—荼甲酸(H_2A)、邻菲咯啉(Phen)三元固体配合物的合成方法.通过化学和元素分析,IR,UV,~1HNMR,X射线粉末衍射、摩尔电导,磁化率、差热等对所合成的配合物进行了结构、组成和性质的研究.     

混合配体稀土三元配合物的研究V．吲哚3－丙酸邻菲罗啉稀土三元配合物的合成及性质

本文报道首次合成了１５种稀土三元配合物，经过元素与化学分析，确定配合物组成为：ＬｎＰ３Ｐｈｅｎ（Ｌｎ为稀土离子，Ｐ为吲哚－３－丙酸根，Ｐｈｅｎ为邻菲啉），通过化学分析、红外光谱、热谱、紫外光谱．ＨＮＭＲ谱、荧光光谱．Ｘ射线粉末衍射和Ｘ光光电子能谱等方法对新合成三元配合物的结构及性质进行了研究．     

N－一羧乙基－邻菲啰啉的合成及其过渡金属配合物的研究

本文报道了Ｎ－一羧乙基一邻菲啰啉的合成及其过渡金属（Ｃｕ、Ｚｎ、Ｃｏ、Ｎｉ）配合物的制备方法，经化学和元素分析确定了它们的组成，测定了配合物的摩尔电导、溶解性；用红外光谱、紫外光谱、热谱等方法对配合物的结构进行了研究。     

用MET分析NdFe_（10）V_2，NdFe_（10）V_2N_（0．5）Nd

用两格点分子场理论分析了ＮｄＦｅ１０Ｖ２，ＮｄＦｅ１０Ｖ２Ｎ０．５，ＮｄＦｅ１０Ｍｏ２，ＮｄＦｅ１０Ｍｏ２Ｎ０．５的饱和磁化强度随温度的变化关系，得到了分子场系数ｎＦＦ，ｎＦＲ和ｎＲＲ，计算结果与实验基本一致，计算结果表明，氮元素增大了交换场ＨＲ．     

硫杂冠醚气相色谱固定相的研究

硫杂冠醚用作气相色谱固定相,制备毛细管柱,考察固定相的使用比例、极性、热稳定性,并对甲基苯酚(o/p),二氯苯(o/p,m),硝基氯化苯(m/o)等难分离的混合样品进行色谱分离.实验结果表明:使用固定相的质量比例为15%时有好的分离效果,固定相中等极性,120 ℃时平均极性为815,且使用温度高(185 ℃),热稳定性好.从分离性能看,该固定相具有较好的应用前景.     

10kV城市住宅区配电方式探讨

随着我国经济的快速增长和人民生活水平的提高,住宅区配电网规划也日渐重要.本文通过分析总结住宅区配电网规划的方法与步骤,阐述了住宅区配电规划应该注意的问题及解决思路,明确了住宅区配电规划既要满足城市电网规划的基本要求,更要结合住宅区用电的实际情况.     

Phase transition , structure and shape memory effect of Ni47Ti43Hf10 alloy

A Ni₄₇Ti₄₃Hf₁₀ high temperature shape memory alloy is fabricated. The martensitic transformation temperature (TT) is obtained by differential scanning calorimetry and four-probe electrical resistivity measurements. The effect of thermal cycling is investigated and it is found that the TT tends to be stable quickly, which is of benefit to practical applications. The martensite structure is determined to be B19' monoclinic by X-ray diffraction and transmission electron microscopy. One-way and two-way (which is seldom reported before) shape memory properties are studied by tensile and bending tests. The cycling number of two-way shape memory effect is tested for more than 20000 times.