芳纶帘线与NR的粘合性能研究

用自制的水溶性高活性改性环氧树脂（ＳＪＲ２）与预缩合间苯二酚甲醛树脂（ＳＪＲ１）的混合水溶液作芳纶帘线的粘合活化剂,然后浸渍由ＳＪＲ１配制的间苯二酚甲醛胶乳（ＲＦＬ）浸渍液,可使芳纶帘线获得与ＮＲ优异的粘合性能。芳纶带束层航空轮胎中芳纶帘线与胶料的粘合性能优于全尼龙轮胎中的尼龙帘线。     

芳纶帘线与胶料的粘合性能研究

研究芳纶帘线与钢丝帘线擦胶用天然橡胶（NR）胶料的粘合性能,以及粘合剂RA-65、间苯二酚、新癸酸钴、粘合剂RS对胶料物理性能和芳纶帘线与胶料粘合性能的影响。结果表明：对于钢丝帘线擦胶用NR胶料,芳纶帘线的H抽出力较大,但剥离力较小;粘合剂RA-65和间苯二酚可以提高胶料的硬度和芳纶帘线与胶料的粘合性能;粘合剂RS与间苯二酚对芳纶帘线与胶料的粘合性能的改善效果相近。     

增粘树脂对间苯二酚-甲醛-胶乳体系浸渍连续玄武岩纤维帘线/橡胶粘合性能的影响

研究增粘树脂对间苯二酚-甲醛-胶乳(RFL)体系浸渍连续玄武岩纤维(CBF)帘线与橡胶基体粘合性能和界面疲劳性能的影响。结果表明,加入增粘树脂,橡胶基体的拉伸强度和定伸应力降低,拉断伸长率提高,橡胶与CBF帘线静态粘合性能的变化与间苯二酚/甲醛比例有关,RFL体系浸渍的CBF帘线与橡胶基体的界面疲劳寿命大幅延长。     

基于植物多酚/多胺的芳纶帘线绿色环保浸胶体系及其 界面粘合机理研究

研究了一种基于植物多酚/多胺的芳纶帘线绿色环保浸胶体系（PTA浸胶液）,并对比PTA浸胶液与间苯二酚- 甲醛-胶乳（RFL）浸胶液浸渍处理的芳纶帘线与橡胶的粘合性能。衰减全反射傅里叶转换红外光谱和X射线光电子能谱 分析结果表明,经PTA浸胶液浸渍后,丁吡胶乳包覆在芳纶帘线表面,其含有能参与橡胶硫化的C=C键,帘线的浸渍效 果良好;与RFL浸胶液浸渍的芳纶帘线相比,PTA浸胶液浸渍的芳纶帘线的原始及热老化后H抽出力稍高,室温停放后H 抽出力保持率提高;扫描电子显微镜分析表明,PTA浸胶液浸渍的芳纶帘线与橡胶基体的界面粘合良好。     

偶联剂对芳纶帘线与NR/BR并用胶粘合性能的影响

试验研究硅烷偶联剂Si69和间苯二酚用量对芳纶帘线与NR/BR并用胶粘合性能的影响.结果表明,硅烷偶联剂Si69和间苯二酚用量对芳纶帘线与NR/BR并用胶的粘合性能影响很大,H抽出力随其用量增大迅速上升,达到最高点后又呈下降趋势;间苯二酚的影响更为显著,加入1.5份间苯二酚可获得很好的粘合效果.     

芳纶织物表面处理对其与橡胶粘合性能的影响

采用芳纶表面活化处理、间苯二酚-甲醛-胶乳体系浸渍处理、增粘体系改性三种方法进行工艺优化,研究了芳纶织物表面处理对其与橡胶粘合性能的影响。结果表明,采用表面活化方法可以提高芳纶/橡胶间的界面粘合强度,但会在一定程度上降低芳纶布的本体强度;采用表面浸渍方法可以提高芳纶/橡胶间的界面粘合强度、搭接强度;采用增粘体系改性的方法可以提高芳纶/橡胶间的界面粘合强度,其中丙烯酸树脂(101树脂)效果最佳。     

连续玄武岩纤维帘线与橡胶基体界面粘合性能

探讨间苯二酚-甲醛-胶乳(RFL)浸渍对连续玄武岩纤维(CBF)帘线力学性能及其与天然橡胶/丁苯橡胶基体间粘合性能的影响。结果表明:RFL浸渍处理可以有效地提高CBF帘线的力学性能,改善CBF帘线与橡胶基体间的粘合性能,显著提高疲劳寿命;RFL浸渍处理后,动态疲劳破坏面由CBF帘线与橡胶基体之间转变为橡胶基体内部。     

人造丝浸渍帘线粘合强度的影响因素

人造丝浸渍帘线粘合强度的影响因素朱玉华方玮琳（桦林集团有限责任公司１５７０３２）影响人造丝浸渍帘线粘合强度的因素主要包括浸渍液、浸渍工艺和浸渍帘线的密度等。１浸渍液的影响（１）间苯二酚和甲醛的摩尔比间苯二酚和甲醛在氢氧化钠催化剂的作用下,生成线形酚醛...     

高模量芳纶帘线在浸浆过程中性能之改变

研究了芳纶帘线Русар-75、Русар-175及Русар-200在含炭黑分散体的间苯二酚甲醛胶乳中浸渍时,强度性能发生的变化。文中首次阐述了胶粘剂的附着量对帘线的影响。     

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。     

Surface modification of Kevlar® fiber by a combination of plasma treatment and coupling agent treatment for silicone rubber composite

To improve the adhesion between poly(p-phenylene terephthalamide), PPTA, fiber and silicone rubber, the surface modification of PPTA was investigated. Combining plasma treatment and coupling agent treatment with the silicone adhesive was found to be effective in improving adhesion. The combination process made the pull-out force of the PPTA yarn/silicone rubber composite 2.5 times higher, compared with the plasma treatment or the coupling agent treatment alone. The plasma treatment led to the elimination of carbonized layer from the PPTA yarn surface and the formation of oxygen functionalities including C-O and C=O groups. The elimination of the carbonaceous deposits from the PPTA surface and the interaction between the silicone adhesive and the oxygen functionalities created by the plasma treatment contribute to the improvement of adhesion with silicone rubber.     

对位芳纶纤维的多巴胺仿生修饰及硅烷偶联剂二次功能化

研究采用多巴胺仿生修饰和硅烷偶联剂二次功能化的新方法对对位芳纶纤维进行表面改性。多巴胺首先氧化自聚,形成聚多巴胺包覆在纤维表面,以提供功能化平台。二次功能化硅烷偶联剂单体接枝到纤维表面的聚多巴胺层,在纤维表面引入有助于提高粘合性能的表面官能团。整个表面改性过程简单,无毒和可控。表面改性后的对位芳纶纤维/橡胶复合材料的H抽出力提高了69%,高温老化后粘合力保持率也显著提升。     

Epitaxial crystallization of nylon 6 cast from solution on the surface of poly(p-phenylene terephthalamide) filament

Poly(p-phenylene terephthalamide) (PPTA) fiber has the characteristics of high modulus and strength, and has been employed as the reinforcement in composite materials. The interfacial interaction between the PPTA filament and nylon 6 matrix has been investigated to make use of these characteristics of PPTA in fiber-reinforced composite systems. In the case of composites composed of the PPTA filament and nylon 6, two types of expitaxial crystallization have been observed depending on the concentration of a formic acid solution. From concentrated solution, nylon 6 forms a columnar cystal around the PPTA filament. A two-dimensional spherulite model, (i.e., a disk shape) is proposed for the aggregated structure of nylon 6 chains on the basis of wide-angles x-ray diffraction, small-angle x-ray scattering studies, and scanning electron microscopic ebservation. The a*-axis of the nylon 6 crystal is directed radially in its columnar crystal. In the inner portion, close to the interface, the be-plane is in contact with the surface of the PPTA filament, also, the directions of the b- and c-axes are paral el and perpendicular to the PPTA filament axis, respectively. On the other hand, their axes rotate about the a*-axis in the outer portion, far from the interface region. Furthermore, a different type of epitaxy was observed in the case of crystallization from a dilute solution of nylon 6 in formic acid. These two types of crystal growth were investigated from the view of crystallization condition and crystallographic lattice matching at the interface region between the PPTA filament a nylon 6. It is concluded that the hydrogen bonding between PPTA and nylon 6 molecules at the interface plays an important role for epitaxial crystallization, in addition to lattice matching.     

Interfacial interaction between poly(p-phenylene terephthalamide) filament and nylon 6 matrix crystallized from the melt

Nylon 6 was isothermally crystallized at 483 K for 45 in the presence of poly(p-phenylene terephthalamide) (PPTA) filament. Two kinds of traqnscrystalline zones were observed around the surface of PPTA filament by polarized optical microscopy. The two are designated as the interfacial and the intermediate zones from the surface of PPTA filament. The aggregation state of molecular chains in these zones was characterized by means of microbeam x-ray diffraction and birefringence. The a*-and the a-axes of nylon 6 oriented perpendicularly to the filament surface, aligning along the radial direction in the interfacial and intermediate zones, respectively. The b- and c-axes rotate around these a*-and a-axes. The DSC measurement revealed that nylon 6 molecules in the interfacial zone crystallized and also melted at a higher temperature, compared with those in the intermediate zone or with the usual three-dimensional spherulite. Viscoelastic measurement clarified the fact that the interfacial zone had a restraining effect on the molecular motion of nylon 6 in the compostes with PPTA fiber. The interfacial zone is preferable for reinforcing the composite with respect to modulus.     

Surface modification of aromatic polyamide film by aminoethanethiol solution for silicon rubber composites

The surface modification of poly(p-phenylene terephthalamide) (PPTA) film with 2-aminoethanethiol (AET) to adhere to silicon rubber was investigated. The combination of the AET treatment and the silane coupling treatment is an effective surface modification of the PPTA film for this adhesion. The x-ray photoelectron spectroscopy (XPS) analyses show that the AET treatment does not generate sulfur functionalities at the surface of the PPTA film but does generate oxygen functionalities. In the AET treatment process, a part of the amide groups near the surface of the PPTA film is hydrolyzed to form carboxylic acid groups and amino groups. The oxygen functionalities are condensed at the film surface, and nitrogen functionality is diluted at the film surface. The C(O)O moiety at the PPTA film surface may be a key factor for the adhesion with silicon rubber. The C(O)O moiety is mobile from the bulk of the PPTA film to the film surface. Hot water treatment of the original PPTA film makes the impossible adhesion with the silicon rubber possible. The hot water treatment, however, is not as powerful a surface modification as the AET treatment. © 1995 John Wiley & Sons, Inc.     

Preparation and properties of high-strength-high-modulus polyimide cords/natural rubber composites

High-strength-high-modulus polyimide (PI) cords reinforced natural rubber (NR) composites are prepared, and the PI cords are treated with resorcinol-formaldehyde-latex (RFL) adhesive to enhance the interfacial adhesion with NR matrix. The influence of RFL adhesive variables, such as the ratio of R/F and RF/L, on the adhesion between PI cords and NR is investigated. Furthermore, sorbitol glycidyl ether (SGE) and caprolactam blocked methylene diisocyanate (CBI) are adhered to the surface of the PI cords through a dip-coating procedure to introduce epoxy and NCO groups and graft with more RFL adhesive. The H pull-out force of SGE/CBI-RFL treated PI cords/NR composites reaches as high as 193.9 N, which is 580% higher than that of untreated PI ones. Additionally, the SGE/CBI-RFL treated PI cords/NR composites exhibit superior adhesion, aging, and fatigue resistance together with better mechanical properties as compared with SGE/CBI-RFL treated poly(para-phenylene terephtalamide) (PPTA) cords/NR composites.     

新型12位对位芳纶生产线的研发

介绍了新型12位对位芳纶生产线的流程和特点,并对该生产线上主要单元机的结构特点和研发重点进行了探讨.新型12位对位芳纶生产线目前已在国内一些化纤厂应用,而且收到了良好的使用效果.     

Surface modification of aromatic polyamide film by plasma graft copolymerization of glycidylmethacrylate for epoxy adhesion

The graft copolymerization of glycidyl methacrylate, GMA, onto poly(p-phenylene terephthalamide), PPTA, film surfaces was investigated to improve adhesion between the PPTA film and epoxy adhesives. The graft copolymerization of GMA was carried out in two steps; a peroxide formation by a combination of argon plasma irradiation and air exposure, and the polymerization reactions of GMA. XPS analyses showed the graft copolymerization of GMA on the PPTA film surface, and only 31–40% of the PPTA film surface was covered with the GMA graft polymers. The graft copolymerization of GMA improved the adhesion between the PPTA film and the epoxy adhesive. The adhesion strength was improved 2.7 times by the graft copolymerization. The failure from the adhesive joint occurred in the epoxy adhesive layer rather than at the interface between the PPTA film and the epoxy adhesive layer. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 1179–1185, 1998     

Effects of potassium titanate whiskers on the mechanical and thermal properties of poly (para‐phenylene terephthalamide) paper sheet

In this work, poly(para‐phenylene terephthalamide) (PPTA) paper sheets composed of PPTA fibers and PPTA fibrids filled with highly crystalline and high ratio of length to diameter potassium titanate whiskers (PTW) were investigated in view of possible employment as reinforcement and cost‐reducing materials. The morphological characteristics and the role of PPTA fibrids, the influence of PTW on the mechanical properties, interfacial adhesion, and thermal stability of the PPTA paper sheets were discussed. The results showed that the ductile, flexible and rough morphological characteristics of PPTA fibrids are helpful to improve the properties of PPTA paper. PTTA fibrids strongly wrapped PTW in the PPTA paper sheet was observed, which largely enhanced the retention rate of PTW and further improved the interfacial combination. The presence of PTW improved the mechanical properties and thermal stability of PPTA paper sheets. This research demonstrated the improvement of thermal and mechanical performances of PPTA paper sheets by incorporating of PTW, suggesting a significant cost‐reducing potential for the production of PPTA paper composite materials. POLYM. COMPOS., 38:1390–1395, 2017. © 2015 Society of Plastics Engineers     

废弃芳纶粉末环氧化改性及其固化物性能

针对国内对位芳纶（PPTA）在实际生产中产生的低分子量PPTA粉末,探讨了一种有效回收再利用的方法。本文以低分子量PPTA为原料、环氧氯丙烷为改性剂,采用金属化/取代反应,制备了环氧氯丙烷（ECH）修饰的PPTA（PPTAGE）,并通过单因素实验优化了PPTAGE合成条件。结果表明：合成条件为m(ECH）∶m(PPTA)=3∶1、NaH用量（与总投料量质量之比）0.4%、反应温度80℃、反应时间4.5h时,PPTAGE接触角最小,纤维表面能最佳。将改性前后的芳纶分别作为环氧树脂的填料,得到固化物样条,研究了PPTAGE对环氧树脂复合材料力学性能的影响。固化物力学性能研究表明,PPTAGE可以在一定程度上提高与环氧树脂基体的黏合,在添加量为1%时,复合材料的力学性能达到最佳;热重（TGA）分析表明,固化物热稳定性较PPTA/E-51有所提高;扫描电镜（SEM）测试表明,PPTAGE/E-51冲击断裂面为韧性断裂。