用等离子体处理和聚合法提高帘布-橡胶粘合强度

研究了用等离子体处理进行的几种不同类型的PET帘线的改性。聚酯帘线经过等离子体反应器中产生的脉冲表面正电晕放电或经过大气压下共面介电势垒放电处理，帘线与橡胶基质的粘合强度、机械性能和表面特性均发生明显的变化。表面放电是以帘线由氮脉冲等离子体激活为基础，随后用马来酸（MA）溶液接枝，以提高帘线与橡胶的粘合强度。研究了溶液中的MA浓度、帘线移动速度和接枝时间等3个参数。用氮与丁二烯的混合物对帘线进行等离子体聚合改性，通过脉冲表面正电晕放电可以在正常大气压下产生均匀等离子体层。结果显示，等离子体处理的帘线的静、动态粘合强度值可与用RFL标准化学处理的帘线媲美。等离子体处理对机械性能无任何影响。还研究了等离子体改性聚酯帘线的形态变化。     

聚酯帘线与NBR粘合性能的研究

试验研究不同粘合体系对聚酯帘线与NBR粘合性能的影响。结果表明，采用HRH胶粘剂体系的聚酯帘线与NBR的粘合性能优于RFI。表面浸渍体系，前的平均剥离强度比后高282％，H抽出力大11N；扫描电镜断面照片显示，使用HRH胶粘剂体系的橡胶与帘线粘合紧密。     

马来酸酐预处理炭黑对尼龙-66帘线与天然橡胶粘合的影响

用H抽出试验和扫描电镜考查了表面改性炭黑对尼龙－帘线与天然胶粘合等性能的影响，结果表明：帘线抽 浸胶层纤维全新断裂并被剥离，说明破坏发生在帘线本体，帘线与橡胶的粘合界面保持完好。老化后，破坏发生在胶料本体。     

聚酯帘线与橡胶粘合技术的研究进展

从聚酯帘线的表面改性、间苯二酚-甲醛-胶乳（RFL）二次浸渍工艺、改性RFL一次浸渍工艺和胶料配方调整等方面介绍聚酯帘线与橡胶粘合技术的研究进展。聚酯帘线表面改性包括紫外光辐射和低温等离子体处理等;RFL二次浸渍工艺即先用化学方法将聚酯帘线表面活化或用特殊分散剂浸渍,再用RFL浸渍液处理;在普通RFL浸渍液中加入改性剂再进行浸渍处理,也可提高聚酯帘线粘合强度;还可通过调整胶料组成和采用不同增粘体系等方法提高聚酯帘线与橡胶的粘合性。     

试验频率和温度对橡胶/纤维帘线复合材料动态粘合性能的影响

研究试验频率和温度对橡胶/纤维帘线复合材料动态粘合性能的影响,并通过扫描电镜分析粘合失效后纤维帘线的表面形貌。结果表明,降低试验频率和提高试验温度会加速橡胶/纤维帘线复合材料的粘合失效,这主要是由橡胶基体的破坏以及橡胶与纤维帘线的界面脱粘引起的。     

环保型浸胶液的应用性能研究

研究环保型浸胶液(EPD)的应用性能。结果表明:EPD浸胶的聚酯、锦纶66和芳纶帘线具有良好的粘合性能及粘合表面,浸胶聚酯帘线的动态粘合性能达到常规D417+RFL浸胶聚酯帘线水平;与D417+RFL浸胶聚酯帘线相比,EPD浸胶聚酯帘线动态疲劳强力保持率和热老化粘合力保持率增大;EPD具有良好的稳定性。     

氮气等离子体处理对芳纶与橡胶粘合性能的影响

研究氮气等离子体处理对芳纶帘线表面形态及其与橡胶粘合性能的影响。结果表明,氮气等离子体处理可在一定程度上提高芳纶帘线与橡胶的粘合性能;芳纶经氮气等离子体处理后再结合浸胶,粘合强度显著提高;高功率、长时间处理有利于芳纶帘线与橡胶粘合性能的提高,但会使芳纶帘线的强度下降。适宜处理条件为：功率100～125W,时间5～7min。     

轮胎用钢丝帘线与橡胶的粘合机理

从钢丝帘线的表面结构出发,阐述了钢丝帘线与橡胶硫化后产生的硫化铜粘合层结构以及其与橡胶结合的状态模型,说明钴盐参与反应以及间-甲树脂粘合促进剂在橡胶中的作用情况;并介绍了钴盐以及粘合树脂对整个粘合层耐老化过程的贡献作用机理.     

芳纶/聚酯复合帘线性能研究

通过改变芳纶／聚酯复合帘线的初捻捻度比和复捻捻系数对比了复合帘线的强伸性能变化规律，并优选加捻参数，研究了芳纶、聚酯、芳结／聚酯复合帘线在不同温度下老化不同时间的静态及往复拉伸疲劳后的粘合性能和不同受力条件下动态往复疲劳后的粘合性能以及不同受力条件下动态往复疲劳后的粘合强度保持率，比较了３种帘线的耐疲劳性能。结果表明，复合帘线的静、动态老化后粘合性能均优于芳纶、聚酯帘线，耐疲劳性能比芳纶帘线略有提高，成本比芳纶帘线降低４４％。     

橡胶帘线粘合性能在动态及加热条件下的评价方法

橡胶-帘线(包括钢丝帘线)复合材料在动态条件下粘结界面发生物理化学变化,直接影响材料使用性能。介绍橡胶-帘线动态剪切粘合试验基本原理:将帘线埋于方块硫化橡胶试样中,帘线两端悬以质量不同的砝码。试验时橡胶试样以一定的振幅和频率沿帘线伸延方向做往复运动,考察帘线与橡胶达到某一设定的粘合强度值所需的时间,用以表征帘线与橡胶在动态条件下的粘合性能。应用该原理和实用仪器对不同材质橡胶-帘线粘合性能做出测试和评价。     

高能丁羟推进剂用键合剂分子设计与应用

针对不同丁羟推进剂配方特点 ,设计合成几种新型键合剂 ,并分别在这些推进剂中试用。结果表明 :键合剂结构不同 ,对推进剂高、低、常温力学性能的影响也不同。同时还初步探讨了这些键合剂的键合机理     

Synthesis and properties of elastomeric ionenes I. Polybutadiene ionenes

Polybutadiene ionene (PBI) carrying quaternary ammonium ions in the main chain was synthesized from dimethylamino-terminated polybutadiene and 1,4-dibromobutane. Dimethylamino-terminated polybutadiene was prepared by the reaction of isocyanate-terminated polybutadiene with 2-dimethylaminoethanol. The swelling property and the mechanical properties of PBI were compared with those of polybutadiene urethane (PBU), which was prepared by the reaction of hydroxy-terminated polybutadiene with a diisocyanate. The following points were found: (1) PBI shows almost the same solubility parameter δ_p as that of PBU; (2) PBI attains a four time greater tensile strength at break than PBU at room temperature; (3) PBI shows a thermoplastic behavior.     

刚性聚氨酯增韧改性环氧树脂的研究

在环氧树脂(EP)中加入以对苯二甲酸二甲酯为原料合成的端羟基芳香聚酯及2,4—甲苯二异氰酸酯(TDI),采用原位聚合法制备了刚性聚氨酯(PUR)增韧改性EP。用红外光谱表征了其反应,探讨了端羟基芳香聚酯含量、端羟基芳香聚酯与TDI摩尔比和固化剂用量对改性EP力学性能的影响,并用扫描电子显微镜观察了改性EP的冲击断面。结果表明,在提高EP韧性的同时,改性EP的其它力学性能都得以提高。     

Radiation curing of AP/HTPB-based energetic composites. I. Effect on physico-mechanical properties

The use of gamma radiation has been successfully demonstrated as a powerful tool for curing of formulations of ammonium perchlorate and hydroxy-terminated polybutadiene. This is not possible by conventional methods. The porosity observed in the composite is attributed to the shrinkage of matrix localized around surface of AP particles which creates voids in the bulk. Occurence of shrinkage is in the interphase zone and is due to excessive crosslinking of polybutadiene caused by radiolytic products of AP. Incorporation of toluene diisocyanate and ferric acetyl acetonate showed loss of radiation induced porosity and increase in density, tensile strength and elongation.     

A Study of β-Azidoethylamino-3-Nitro-1,2,4-Triazole-5-Onate

The title compound(AANTO) has been first synthesized, and its molecular structure and crystal structure have been determined. The preliminary applications in hydroxy-terminated polybutadiene propellant(HTPB) and composite modified double base propellant(CMDB) showed that replacement of part of ammonium perchlorate(AP) or HMX by AANTO could reduce the combustion temperature greatly and improve the specific impulse to some extent.     

Effects of liquid burn rate catalysts on Rheological Properties of High-Energy Composite Propellants

Effects of several liquid burning rate catalysts on rheological properties of composite rocket propellants on the basis of hydroxy-terminated polybutadiene as a binder and ammonium perchlorate as an oxidizer have been examined. Theoretical explanation of the observed effects of liquid catalysts on certain rheological properties of the mentioned propellants are given. Laboratory procedures for synthesis of used catalysts are described. The results of physico-chemical characterization of synthesized catalyst are also presented.     

Estimation of Aluminium in HTPB Based Composite Solid Propellants by hydrogen evolution method

Hydrogen gas evolution method has been applied to determine the percentage of aluminium (Al) in hydroxy-terminated polybutadiene (HTPB) based composite solid propellants premix/pastes. The determination is not effected by the presence of Zn, Fe, Cu or small amounts of silicon but magnesium has been found to interfere in the analysis. The results are obtained with remarkable accuracy and reproducibility.     

端羟基聚丁二烯官能度及分布的测定

用凝胶渗透色谱法（GPC）测定端羟基聚丁二烯（HTPB）官能度分布。将HTPB用3,5-二硝基苯甲酰氯在一定条件下进行衍生化反应,衍生化后的HTPB经GPC的示差／紫外（RI／UV）双检测器进行检测,所得的色谱图经数据处理,得到HTPB的官能度及其分布。     

硝酸酯类含能黏合剂绿色合成研究进展

对3种具有发展潜力的硝酸酯类含能黏合剂聚(3-甲基硝酸酯-3-甲基环氧丁烷)(Poly-NIMMO)、聚缩水甘油硝酸酯(PolyGLYN)和硝化端羟基聚丁二烯(NHTPB)的绿色合成工艺和性质进行了简要评述,分析了这些黏合剂的发展前景。并采用以五氧化二氮为硝化剂的绿色合成路线制备得到NHTPB黏合剂,考察了不同官能团对其热稳定性和玻璃化转变温度的影响规律。     

Thermo-Oxidative Degradation of Polybutadiene Binders

Thermo-oxidative degradation of hydroxy-terminated polybutadiene (HTPB) and poly(butadiene-acrylonitrile-acrylic acid) terpolymer (PBAN) binders was studied in the presence of varying amounts of ammonium perchlorate (AP). It was found that the effect of AP on the nature and composition of the pyrolyzates was similar to the effect of increase in pyrolysis temperature. Activation energy for thermal degradation was found to be about 52 kJ/mol for both the polymers. The results are discussed in terms of a linear pyrolysis model.