超滤膜平均孔径测算的新探讨

利用扫描电镜法测定超滤膜底表面上总孔面积与该底总表面积之比,再结合哈根——泊肃叶定律来推算超滤膜皮层的平均孔径。这样所得的超滤膜平均孔径比起原先单独使用扫描电镜法或哈根—泊肃叶法,可以更客观地反映超滤膜的实际参数

The Compatibility and Rheological Behavior of SBR/PVC Thermoplastic Vulcanizates

采用扫描电镜（SEM）、差示扫描量热仪（dSC）与电子式扭矩流变仪等研究了共混体系丁笨胶/聚氯乙烯热塑性硫化胶（Sbr/PVCTPV）的增容技术、流变性与加工条件之间关系的规律性.The methods to improve compatibility of SBR/PVC TPV and relationships between rheological behaviors and processing conditions of the TPV were studied extensively by SEM,DSC,IR and Brabender Plasti corder(PLE331 and W30H appendages)

尼龙——6自润滑复合材料研究

本文采用烧结成型方法,在较好烧结工艺条件下研究了尼龙-6自润滑复合材料的物理、机械性能与组成间的关系;并得到了最好的自润滑复合材料的组成为:72%尼龙-6加20%EkOnOl加5%玻纤加3%石墨

The Toughening Mechanism of PVC/EVA Blends

采用相差显微镜、TEM 与体积应变测量等方法研究EVA 对PVC的增韧机理.结果表明,剪切带、银纹与适量的空穴都对增韧有贡献,但以剪切带的贡献最大.并提出EVA网络结构在增韧中的作用.The toughening m echanism ofPVC/EVA blends bas been studied by vol- um e strain m ethod,phase contrast m icroscope,and TEM etc.Tw o conclusions are obtained as follow s:(i).The m echanism forEVAto toughen PVCism ainly dueto shearbands.Thecrazes and a justrightam ountofcavities also benefitto toughen PVC.(ii)The role ofEVA netw ork for toughening PVCis m ainly in prom oting PVCm atrix to cause shearbands easier than EVA particles do

PHYSICAL MODIFICATION of SELF-LUBRICANT NYLON-6

采用烧结成型方法,在较好烧结工艺条件下研究了尼龙6自润滑材料的物理、力学性能与组成间的关系,并得到了最好的自润滑材料配方。With the sintering method and under a better sintering conditions .the relationship between the physical & mechanical properties and the compositions of selF-lubricant Nylon-6 composite have been investigated.And an optimum composition of selF-lubricant materials has been obtained

The Study on PVC/EVA Blends:Relationships Among Structure,Compatibility,Rheological Behavivor and Properties

用dSC、TEM、SEM与毛细管流变仪等对PVC/EVA材料的相容性、流变行为、加工条件与结构、性能间的关系做了较深入而全面的研究.结果表明：相容性与加工条件对材料的形态结构与性能有重要影响；随着EVA含量或EVA中VA含量的增加，EVA相从分散颗粒逐渐转变到连续网络，且随着这种形态转变，材料便从脆性过渡到韧性；材料的熔体属于非牛顿流体中的假塑性流体.The relationships among compatibility,rheological behavior,processing conditions,structure and properties of PVC/EVA blends have been investigated by DSC,TEM,capillary rheomefer etc..Some results are as follows:(1)Partial compatibility plays an important role in the formation of EVA network structure;(2)During increasing EVA content ,the morphology of EVA phase of the blend changes from dispersed particles to continuous network,accompanied by making the blend from brittleness to ductility;(3)The melt of blend belongs to the non Neutonian and pseudoplastic fluid

聚氯乙烯/聚丙烯腈共混超滤膜的研究 Ⅲ.制膜工艺条件对共混超滤膜结构与性能的影响

考察制膜工艺条件对于PVC/PAN 共混超滤膜结构与性能的影响,发现该影响与共混高聚物本身的相容性关系密切。虽然凝胶浴温提高都使膜的透水率提高而截留率下降,但相容性好可在截留率下降较小的情况下较大地提高透水率;利用少量NaCl 对凝胶浴的添加,也只有在相容性好时才能在不降低透水率的情况下有效改善截留率;蒸发时间的影响也因相容性不同而异,但延长蒸发时间并不可取