非织造和产业用高性能纤维

介绍了碳纤维、芳纶、聚对苯撑苯并双噁唑(PBO)纤维、超高相对分子质量聚乙烯(UHMWPE)纤维、聚苯硫醚(PPS)纤维、聚酰亚胺(P)I纤维、玄武岩纤维、芳砜纶的国内外发展概况及其在产业领域的应用。     

641125电磁屏蔽复合导电无酸PSA胶带的研制

以无酸丙烯酸酯系压敏胶为导电胶基体,苯二亚甲基二异氰酸酯（XDI）为交联剂,镍／银混合粉体为导电填料,制备了铜箔导电胶带。讨论了导电粒子的种类及其添加量、交联剂的用量、老化存放时间等对导电胶带的粘接性能、导电性能及电磁屏蔽性能的影响。结果表明,当镍银混合粉添加15％,交联剂用量25％,干胶厚度45μm时,制备的胶带综合性能良好。其粘接强度大于19N／25mm,体积电阻率为6×10^-3Ω·cm,电磁屏蔽效能大于90dB（频率从30-1500MHz）,且耐高温性能稳定。     

醋酸乙烯酯-丙烯酸丁酯共聚乳液地板胶的研制

用醋酸乙烯酯与丙烯酸丁酯进行乳液共聚合,所得产物用作木地板胶粘剂。介绍了它的合成方法和性能,讨论了粘接试件浸水24小时后的不同自然干燥时间、胶层厚度等对剪切强度的影响。     

KPS引发淀粉接枝甲基丙烯酸二甲氨基乙酯的合成

以玉米淀粉为母体,过硫酸钾为引发剂,接枝共聚甲基丙烯酸二甲氨基乙酯,研究了不同条件对淀粉接枝甲基丙烯酸二甲氨基乙酯反应的影响,认为该反应体系的最佳反应条件为:DM浓度为0.35mol/L,引发剂浓度为6.5mmol/L,淀粉糊化温度为85℃,反应温度为65℃,pH为8左右,反应时间为3h。     

乙—丙共聚乳液应用研究

本文系统讨论了颜料及填料类型和用量对乙-丙乳液涂料漆膜性能的影响,考察了该涂料的综合性能。其主要性能指标:遮盖力值小于0.2kg/m~2,抗冲击强度为0.50kg·m,柔韧性通过1×10~(-3)m,硬度0.6,附着力100%,漆膜耐水、耐酸碱盐、耐热、耐冻融性良好。     

氧化蜡接枝丙烯酸的改性研究

对丙烯酸接枝熔融氧化蜡进行了研究,分别探讨了反应温度、过硫酸铵质量分数、丙烯酸质量分数、反应时间等因素对熔融氧化蜡的接枝率的影响,确定了合适的丙烯酸接枝熔融氧化蜡的正交工艺条件为:反应温度为85℃,过硫酸铵质量分数为3.5%～4.5%,丙烯酸质量分数为40%,反应时间为3h,最终按照正交实验总结出的优化方案制备出了接枝率、酸值、贮存与离心稳定性等性质优异的改性氧化蜡。     

新型阻燃氯丁胶乳阻燃、黏合体系及其浸渍工艺的研究

研究了新型阻燃氯丁胶乳的阻燃和黏合性能及其影响因素．试验结果表明,当Sb2O3的添加量为10．6份时,胶乳的阻燃性能大幅度提高;在CR中加入粘合剂RF／RA（添加量比为4：4．6）可在一定程度上提高帆布／橡胶层的黏合性能;浸渍工艺对阻燃和黏合也有一定程度的影响,且一浴浸渍异氰酸酯和环氧树脂,烘干温度为105℃,时间为10min,二浴采用15％的氯丁胶乳浸渍2次,并经过105℃预烘干和200℃快速定型,氯丁胶乳的阻燃和黏合强度最大．     

Preparing Exfoliated MMT/Polymer Nanocomposites by Combined Latex Compounding and Spray‐Drying

A facile and easily industrialized approach for preparing highly dispersed MMT/polymer nanocomposites is developed by combining the latex compounding method and a spray‐drying process. Clay particles are successfully delaminated into layers, and layer re‐stacking is effectively prevented. HR‐TEM and XRD results confirm that MMT layers achieve exfoliated or nearly exfoliated dispersion in both MMT/styrene‐butadiene rubber and MMT/PS nanocomposites. Compared with melt‐blended MMT/SBR composites, MMT/SBR nanocomposites prepared by this new strategy exhibit extremely high dynamic modulus.

     

High-Elastic Blood Compatible Material

Abstract

Materials with unique complex of the properties of elasticity and tensile strength processed from the natural rubber latex (NRL) were modified to improve their blood compatibility. ESCA, ATR-IR, UV-spectroscopy and other methods were used for appraisement of the grade of modification, structure and properties of material. Thromboresistancy was studied in in vivo and ex vivo tests. It was shown that blood compatibility is raised after thorough purification of the material from non-rubber components by means of two-stage extraction changing the physical-chemical parameters of the surface. Two different principles were used in the process of modification: 1) coating by thin polyurethane (PU) coverings with improved thromboresistant properties-thus the problem of providing high adhesion interaction of covering with the latex base was solved; 2) heparin surface immobilization-higher efficiency of modification of latex material in gel-form without preliminary protein adsorption was shown. Modification allows to increase blood compatibility of the latex materials preserving at the same time their elasticity and tensile strength.     

胶乳型互穿网络聚合物的研究

综述了胶乳型互穿网络聚合物的研究,着重介绍了合成工,乳胶粒形态结构的影响因素,同时亦对胶乳型互穿网络聚合物的性能作了介绍。