半成品总压缩率对成品钢丝力学性能的影响

在生产高性能钢丝时,采用常规拉拔工艺时断丝严重,产品韧性较差,从而严重地制约着产品的合格率。采用加大半成品的总压缩率的方法,可以提高半成品热处理后的强度,从而可以减小成品拉拔的总压缩率,这样,有利于保证成品的强度和韧性。     

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.     

韧性度与其它参数在连通性方面的比较

研究了韧性度与其它参数的关系 .利用各个参数的定义及一些例子 ,对韧性度与其它参数进行了比较 ,得出了韧性度是一个能衡量图连通性的较好的参数     

筒子图Pn×Cm的粘连度

讨论了筒子图Pn×Cm的性质和粘连度．     

化纤复丝强度与纤维根数的关系

以单纤维强度服从Weibull分布、纤维束强度服从正态分布条件下纤维束强度与纤维根数间的关系为理论基础，测定分析了实际PET，PA6DTY复丝的平均强度与纤维根数间的关系，得出：复丝内纤维根数增加，复丝的平均强度下降；但当纤维根数增加到一定程度时，由于纤维间的相互作用增大，复丝强度又有所提高．除了强度分布因素外，实际复丝的强度与纤维根数的关系还受到复丝纱线结构、复丝内纤维间相互作用等因素的影响．     

聚酯复丝中纤维的强伸度及其分布

测定了聚酯复丝内各根纤维和一根纤维的线密度、强度和断裂伸长，并用Weibull分布模型分析了复丝内各根纤维和一根纤维的强度分布。结果表明：复丝内各根纤维间和一根纤维的断裂强度不均基本相同，都小于断裂伸长不均。聚酯纤维的强度较好地符合Weibull分布，且也发现存在变化现象。     

柔性复合材料及其应用

本文综述了目前柔性复合材料的研究。柔性复合材料具有大变形和非线性弹性的特点,基本分析建立在经典的层合理论和非线性弹性力学的基础上。这种材料的应用实例有帘子线/橡胶复合材料,涂层纤维织物,以及含波纹纤维的复合材料等。      

PLS新型调剖剂的研制和应用

A polymer/layer silicate PLS compound water absorher gel,a new kind of profile control agent,has been developed by using the monomer intercalated hybrids polymerizing method.Consideying the MMT’s constitute, fineness and surface character,through X diffraction analysis and Bragg formulae calculation,the interlamination spacing strutted by MMT is 0.6-1.2 nm.The objective numerators enter the main body of MMT’s interlamination effectively and form the compound sop stuff.In this paper, we not only optimize the construction of PLS, but also appraise its performance.Results have shown that the expanded ratio of PLS can be reached 13～62,is salt tolermore is 2.5×10⁴mg/L,temprratare tolerance is 90℃ according to water salinity.PLS gel has contractility in the oil.Furthermore,PLS gel has good tenacity and is unbreakable when temperature is 90℃ and the tenacity coefficient reaches 0.8-1.0. Through in-situ operation on Guan 48-4-1 well and 45-1 well in Dagang Oilfield,oil production has increased to 2 400 t. The input/output ratio has been reached 6:1,which has obvious effect.     

苎麻、亚麻包芯纱机械物理性能的研究

本文研究目的是探讨以低弹涤纶长丝为纱芯的苎麻和亚麻包芯纱,在不同捻系数和不同混和比的情况下,其机械物理性能变化规律。试验结果表明:包芯纱的断裂伸长率、断裂功和弹性恢复率均高于纯麻纱,乌氏条干均匀度有较明显改善,断裂强度低于纯麻纱。包芯纱断裂强度与捻系数间呈抛物线变化规律;断裂伸长率随捻系数增加而增加,弹性恢复率随捻系数增加而下降,两者均呈线性变化规律。捻系数对条干均匀度无明显影响。     

地组织结构及材料对多轴向经编增强复合材料拉伸性能的影响

多轴向经编增强复合材料是当今复合材料领域的新产品,由于其优异的力学性能深受各方面的关注。在原有研究的基础上，郑重对多轴向经编增强织物两种常用的地组织结构及两种常用的材料对复合材料性能的影响进行深入的感觉,得出了一些结论，为今后经编多轴向增强材料的应用及发展提供了一定的理论基础。