胶料自粘性的测定方法及增粘树脂TKM系列的性能评价

简要介绍了增粘剂的种类、烷基增粘树脂的增粘机理,推荐一种胶料自粘性的测定方法,并将改性多元烷基酚醛树脂ＴＫＭ系列与现在通行的几种增粘树脂进行近理性粘性、实用胶料物理性能与粘性的试验对比。结果表明,增粘树脂ＴＫＭ系列产品可显提高胶料的粘性,增粘效果与粘性保持性能与对叔丁基苯酚－乙炔树脂相当,优于对叔丁基苯酚－甲醛树脂和对特辛基苯酚－甲醛树脂,具有长效、耐湿、高增粘特性。     

JD-70硅橡胶自粘带研制

研究并制备了一种耐高温、电绝缘的硅橡胶自粘带。合成了含特种元素的聚合物作为增粘剂,这种增粘剂用于硅橡胶中提高了硅橡胶自身粘接性能。另外采用耐热添加剂和辐射硫化技术实现了硅橡胶的耐高温及电绝缘性能。这种自粘带在拉伸条件下互相缠绕后具有融合在一起的特性,可在250℃长期使用,短期耐300℃。     

LLDPE拉伸缠膜的自粘性研究

研究了线型低密度乙烯拉伸缠绕膜的粘性松驰，讨论了粘母料加入量，制膜冷却速率粘性添加剂分子量，碹存温度及不同的制膜工艺方法对缠绕膜自粘性的影响。     

废轮胎胶粉在自粘聚合物改性沥青防水卷材中的应用

研究废轮胎胶粉在自粘聚合物改性沥青防水卷材(自粘卷材)中的应用。结果表明,采用活化度为50%、粒径为250μm胶粉可作改性剂用于制备满足国家标准要求的自粘卷材,卷材适宜的配方:沥青100,胶粉24,苯乙烯-丁二烯嵌段共聚物(SBS) 6,芳烃油12,滑石粉60。活化胶粉中的小分子组分与相容剂、线性化大分子橡胶组分及甲苯不可溶物与SBS作用机理类似,这3种组分可共同替代传统自粘卷材中的相容剂、胶粉及部分SBS,即采用活化胶粉可制得综合性能优异的防水卷材。     

增粘树脂在橡胶压敏胶中的应用研究

介绍了6种不同增粘树脂的特性,研究了其对橡胶压敏胶初粘性、剥离力、持粘性的影响,以及性能随增粘树脂用量增加的变化趋势,测试了6种增粘树脂的耐老化性能。在6种增粘树脂中,石油树脂的耐老化性能和初粘性效果较好。     

星形接枝卤化丁基橡胶性能初步研究

将埃克森公司新近开发的ＣＩＩＲ５０６６和ＢＩＩＲ６２２２两种牌号星形接枝卤化丁橡胶与其它牌号普通ＨＩＩＲ进行了对比试验。结果表明,星形接枝ＨＩＩＲ具有工艺性能好、排胶温度低,压延收缩小、焦烧时间长和自粘保持率高等特点。     

自粘和自粘性

自粘是一种粘合现象，即同种未硫化胶料贴合，并停放一定时间后产生的融为一体的现象。这是两个粘合表面的橡胶大分子通过分子热运动，相互扩散渗透的结果。这种粘合的牢度相当高，达到每厘米好几公斤，也就是说被粘表面存在着粘合力。这种特性是未硫化橡胶独有的，即所谓自粘性。     

谈谈压敏胶粘带初粘性的测试

胶粘剂的初粘性，尤其是压敏胶粘带的初粘性能，对压敏胶粘带的实用性能关系颇大。用现行国标为代表的斜面滚球法测试压敏胶粘带的初粘性，可以对胶粘带生产的质量控制起到很好的作用，但用它直接探索胶粘剂的初粘性是有缺陷的。本文分析了其中的原因，介绍了几种国外新的压敏胶粘带初粘性测试仪器，并提出了对初粘性国标将来修订时的改进建议。     

增粘树脂及其在橡胶中的作用机理

介绍增粘树脂的种类和特征及其在橡胶中的作用机理、粘性测试方法以及影响增粘效果的因素。增粘树脂按其来源和合成路线可以分为天然系列树脂(松香、松香衍生物和萜烯树脂)和合成系列树脂(聚合树脂和缩合树脂),其粘性测试方法主要有滚球法和剥离法两种。在橡胶材料加工和生产过程中,正确选择和使用增粘树脂时需要考虑树脂本身的分子结构及其与橡胶的相容性、树脂的相对分子质量、游离单体含量以及树脂用量等。     

含氟聚酰胺酰亚胺自粘电磁线漆的合成与性能研究

合成了一种新型含氟二胺单体2-三氟甲基-4,4'-二氨基二苯醚(3FODA),该单体具有较高的反应活性和溶解性。使用3FODA替代4,4'-二胺基二苯醚(ODA),与偏苯三酸酐(TMA)、二甲苯甲烷二异氰酸酯(MDI)通过两步法合成了含氟聚酰胺酰亚胺自粘电磁线漆。试验证明,含氟基团三氟甲基的引入明显提高了漆膜的柔韧性和附着力。     

溶剂型有机硅压敏胶的制备及性能研究

以正硅酸乙酯和六甲基二硅氧烷为原料制得MQ硅树脂,MQ硅树脂再与107硅橡胶进行缩合反应,制备了107-MQ;再加入过氧化苯甲酰（BPO）及辅料配成有机硅压敏胶。考察了MQ硅树脂与107硅橡胶的质量比、BPO用量、外加辅料对压敏胶性能的影响。较佳工艺为：MQ与107硅橡胶的质量比为0．75：1．1．75：1、BPO用量2份、丙烯酸羟乙酯用量0．5份（MQ与107硅橡胶总用量100份）,此时有机硅压敏胶液稳定,可长时间放置,初粘32#钢球,剥离强度12N／25mm。     

聚氨酯磁漆在冷轧板表面附着力的研究

介绍了提高聚氨酯磁漆在冷轧板表面附着力的研究。讨论了聚氨酯磁漆中的树脂成分及比例与内聚力、附着力之间的关系。     

全钢载重子午线轮胎0°带束层胶配方及混炼工艺优化

试验研究全钢载重子午线轮胎0°带束层胶配方及混炼工艺的优化效果。结果表明,在全钢载重子午线轮胎0°带束层胶配方中并用炭黑N660,增粘树脂选用TKM-M-11,并减小炭黑N375、白炭黑和不溶性硫黄用量,同时在混炼工艺中采取分段加氧化锌、多段加炭黑等优化措施,降低了胶料的门尼粘度,提高了炭黑分散性、胶料自粘性及硫化胶物理性能,改善了0°带束层的表面粘性,提高了成品轮胎的强度和耐久性能,有效地解决了0°带束层散线的质量问题。     

环保芳烃油对溶聚丁苯橡胶工艺性能的影响

研究几种环保芳烃油（TDAE）对溶聚丁苯橡胶（SSBR）工艺性能的影响,并与芳烃油（DAE）进行对比。试验结果表明：以TDAE替代DAE,随着油品运动粘度或芳烃含量的增大,SSBR生胶及混炼胶的门尼粘度先减小后增大;胶料的门尼焦烧时间延长,硫化速度减慢,t90随油品芳烃含量的减小而逐渐延长,自粘性较好,出口膨胀率减小;硫化胶的物理性能无明显差异。     

Study of tack properties of uncrosslinked natural rubber

The purpose of this study was to better understand the effect of non-rubber substances (mainly proteins and lipids) on adhesion (against glasses) and self-adhesion tack properties of uncrosslinked natural rubber (NR). Various types of NR, with or without non-rubber constituents, were prepared. Synthetic polyisoprene rubber was also used as a reference material. All the rubbers were first characterized by many techniques (FT-IR, DSC, GPC, etc.). Two experimental tests were specially utilized to measure the level of adhesion and self-adhesion: (i) at very short contact times (from a few milliseconds up to 0.1 s) the impact of a pendulum and (ii) for longer contact times (from 0.1 s to a few h) the contact of a probe using a tensile testing machine. The tack energy increased with contact time for all the rubbers studied. Natural rubber which did not contain proteins and lipids exhibited the highest adhesion and self-adhesion tack abilities. In contrast, whole natural rubber, containing both proteins and lipids, showed the lowest tack property. In each case, self-adhesion levels are higher than those of adhesion, presumably due to interdiffusion of macromolecular chains or chain segments at the interface.     

Self-adhesion of natural rubber modified with phosphorylated cashew nut shell liquid

The self-adhesion strength of natural rubber (NR) compounds modified with phosphorylated cashew nut shell liquid (PCNSL) prepolymer has been studied with respect to variations in contact time, contact pressure, storage time, and concentration of PCNSL. The self-adhesion strength of NR as measured from the 180° peel test showed a maximum at 10 phr of PCNSL. The adhesion between substrates containing various concentrations of PCNSL (from 0 to 20 phr) also reached a maximum at a PCNSL concentration of 10 phr in one of the substrates. An increase in self-adhesion strength with storage time was observed for the PCNSL-modified NR compounds, which is presumed to be due to the time-dependent interfacial diffusion.     

Bonding elastomer layers together by a surface oxidation reaction

An experimental study has been carried out of the self-adhesion of thin layes of three crosslinked elastomers: cis-polyisoprene (natural rubber) and two polybutadienes. For the polybutadiene materials, the strength of self-adhesion was found to be strongly dependent upon the time of exposure of the two surfaces to air before they were brought into contact. The strength rose dramatically after the first hour or so of exposure so that in some instances the layers could not be forcibly separated later. When the surfaces were exposed to air for longer periods before joining them, the strength of self-adhesion fell to low levels again. This remarkable enhancement in self-adhesion, caused by prior exposure to air for short periods, did not take place on exposure to nitrogen or for samples of cis-polyisoprene, and it was reduced or delayed in samples containing antioxidant. It is therefore attributed to surface oxidation reactions that can lead to the formation of interfacial covalent bonds with polybutadiene but not with polyisoprene. Some possible reaction schemes are discussed.     

增粘树脂T5600在全钢载重子午线轮胎中的应用

试验研究增粘树脂T5600在全钢载重子午线轮胎中的应用。结果表明,以增粘树脂T5600等量替代增粘树脂T0411用于胎圈耐磨胶中,能够提高硫化胶的硬度和定伸应力,降低生热;用于胎肩垫胶中,可以提高硫化胶的弹性,改善胶料的自粘性,降低生热。成品轮胎的耐久性能提高。     

橡胶增粘剂TKO系列产品开发及应用

TKO系列产品为对—特辛基苯酚甲醛树脂。试验表明,其增粘性能比C—H结构的石油树脂高1倍多;增粘作用之有效性、产品质量与性能均达到国外同类产品的先进水平。代表产品TKO(1)—90之粘合性研究对实际使用具有指导意义。