蒙脱土

蒙脱土/BR复合材料的结构和性能研究

董薇，万超瑛*，张勇，张隐西
（上海交通大学化学化工学院高分子材料研究所，上海200240）

摘要：采用熔融共混法制备蒙脱土（MMT）/BR复合材料，研究MMT及其改性产品和硫化体系对复合材料结构和性能的影响。结果表明，NaMMT，DK1N和DK4均能明显缩短胶料的焦烧时间和正硫化时间；与硫化剂DCP硫化体系相比，硫黄硫化体系有利于有机蒙脱土插层的进行，但也可造成部分层片受限；制备过程对DK1N/BR复合材料中DK1N层间距的影响较为明显；与BR相比，硫黄硫化MMT/BR复合材料相对交联密度减小，硫化剂DCP硫化复合材料相对交联密度增大；MMT/BR复合材料相对交联密度由小到大顺序为DK1N/BR,DK4/BR和NaMMT/BR复合材料。
关键词：蒙脱土；BR；复合材料；相对交联密度

中图分类号：TQ330.38+3；TQ333.2文献标识码： A文章编号：1000-890X(2007)08-0453-05
作者简介：董薇（1982-），女，江西东乡县人，上海交通大学在读硕士研究生，主要从事橡胶材料纳米补强改性和加工的研究。

Structure and properties of montmorillonite/BR composite

DONG Wei，WAN Chaoying，ZHANG Yong，ZHANG Yinxi
(Shanghai Jiaotong University,Shanghai200240,China)

Abstract:The effects of the montmorillonite(MMT) and its modified products,including NaMMT and organic montmorillonite(OMMT),as well as the curing system,on the structure and properties of MMT/BR composite prepared by melting mixing method,was investigated.The results showed that,the scorch time and optimum curing time of rubber compound reduced significantly by using NaMMT，DK1N OMMT and DK4 OMMT；compared to DCP curing system，sulfur curing system enhanced the intercalation of OMMT,but could cause confined space by part of the silicate layers;the preparation method had significant effect on the layer spacing of DK1N OMMT in the DK1N/BR composite；the relative crosslink density of sulfurcured MMT/BR composite decreased and that of DCPcured composite improved compared to that of BR；the relative crosslink density of MMT/BR composite was in the order of DK1N/BR＜DK4/BR＜NaMMT/BR.
Keywords:montmorillonite；BR；composite；relative crosslink density

TPU/EVA共混物混炼工艺的研究

梁轶聪，史新妍，王洪振，张萍，赵树高*
（青岛科技大学橡塑材料与工程教育部重点实验室，山东青岛266042）

摘要：采用转矩硫化仪考察填料种类和用量、混炼初始温度、混炼时间和转子转速对热塑性聚氨酯（TPU）/乙烯-乙酸乙烯酯共聚物（EVA）共混物性能的影响。结果表明，与炭黑填充TPU/EVA共混物相比，白炭黑填充胶料的混炼效果和拉伸性能较好，白炭黑最佳用量为30份；TPU/EVA共混物的优化混炼条件为：混炼初始温度160 ℃，混炼时间10～15 min，转子转速45 r·min-1。
关键词：热塑性聚氨酯弹性体；乙烯-乙酸乙烯酯共聚物；共混物；混炼工艺

中图分类号：TQ333.91；TQ334.1文献标识码： A文章编号：1000-890X(2007)08-0458-05
作者简介：梁轶聪（1978-），男，甘肃山丹人，青岛科技大学在读硕士研究生，主要从事聚合物共混的研究。

Study on mixing procedure of TPU/EVA blend

LIANG Yicong,SHI Xinyan,WANG Hongzhen,ZHANG Ping,ZHAO Shugao
(Qingdao University of Science and Technology,Qingdao266042,China)

Abstract:The influence of filler type,filler level,the initial mixing temperature,mixing time and rotor speed on the properties of TPU/EVA blend was investigated by using a torque rheometer.It was shown that,compared to TPU/EVA blend filled with carbon black,TPU/EVA blend filled with silica possessed better mixing effect and higher tensile properties,and the optimal silica level was 30 phr;the optimized mixing conditions of TPU/EVA blend were as follows:initial mixing temperature at 160 ℃,mixing time of 10~15 min,and rotor speed at 45 r·min-1.
Keywords:TPU;EVA;blend;mixing procedure

芳纶纤维与表面处理层界面粘合机理研究

申明霞1，蒋林华1，费传军2，邓洪2，夏涛2
（1.河海大学材料科学与工程学院,江苏南京210098;2.中材科技股份有限责任公司，江苏南京210012）

摘要：用扫描电子显微镜（SEM）和电子能谱仪（XPS）研究芳纶纤维与表面处理层界面粘合机理。结果表明，采用封闭异氰酸酯以及RFL胶乳体系浸渍处理后的芳纶纤维表面增加了一种新的结合碳，而且其它碳的结合能向高能方向移动，纤维表面处理层的氮原子所占比例增大，提高了芳纶纤维的表面活性。
关键词：芳纶纤维;表面处理；界面层；粘合机理

中图分类号：TQ330.38＋9；TQ342＋.72文献标识码：A文章编号：1000-890X(2007)08-0463-04
基金项目：江苏省自然科学基金资助项目（BK2003006）；南京市科技计划项目（200408011）
作者简介：申明霞(1966-),女，山西长治人，河海大学副教授，南京大学在读博士研究生，主要从事高分子材料/纤维增强聚合物性能的教学与研究工作。

Adhesion mechanism of aramid fibre/coating interface

SHEN Mingxia1,JIANG Linhua1,FEI Chuanjun2,DENG Hong2,XIA Tao2
(1.Hehai University,Nanjing210098,China；2.Sinoma Science & Technology Co.,Ltd,Nanjing210012,China)

Abstract:The adhesion mechanism of aramid fibre/coating interface was investigated by scanning electron microscope and Xray photoelectron spectroscopy.The results showed that a new combined carbon appeared on the surface of aramid fibre when it was treated with blocked isocyanate and resorcinolformaldehydelatex,and the binding energy of the other combined carbon shifted to a higher value,the proportion of nitrogen increased,and the surface activity of aramid fibre was improved.
Keywords:aramid fibre；interface；adhesion