硫化剂TCY在活性氯型聚丙烯酸酯橡胶胶料中的应用研究

研究了国产硫化剂 Ｔ Ｃ Ｙ（１ ,３ ,５三巯基２ ,４ ,６均三嗪） 对国产活性氯型聚丙烯酸酯橡胶（ Ａ Ｃ Ｍ） 硫化胶性能的影响。结果表明,与皂（ 钠皂／ 钾皂）／ 硫黄和３ ＃ 硫化剂（ Ｎ, Ｎ双肉桂叉１ ,６己二胺） 硫化体系相比,硫化剂 Ｔ Ｃ Ｙ 硫化体系硫化的活性氯型 Ａ Ｃ Ｍ 硫化胶压缩永久变形小,物理性能和耐热老化性能良好;在硫化剂 Ｔ Ｃ Ｙ硫化体系中,硫化剂 Ｔ Ｃ Ｙ 的用量为０７５ ～１００ 份较合适,促进剂可采用促进剂 Ｐ Ｚ, Ｚ Ｄ Ｃ 和 Ｂ Ｚ;活性氯型 Ａ Ｃ Ｍ 一段硫化胶的硫化程度高,可不进行二段硫化,若要使硫化胶的压缩永久变形大幅度减小,可进行短时间（６ ｈ） 的高温（１８０ ℃） 二段硫化。     

丁腈橡胶－40／三元共聚型氯醚橡胶并用的研究

对丁腈橡胶－４０（ＮＢＲ－４０）与三元共聚型氯醚橡胶（ＣＨＣ）进行了并用研究．发现二者之间的相容性良好。ＮＢＲ－４０／ＣＨＣ并用比为８０／２０时，胶料的综合物理性能较好；为７０／３０时．胶料耐４０＃机油的性能最好；耐四氯化碳溶剂的性能随并用比的减小（ＣＨＣ用量增加）而提高。胶料硫化体系以过氧化物硫化体系［过氧化二异丙苯（ＤＣＰ）／硫黄／四氧化三铅／促进剂ＮＡ－２２］最佳，补强剂选用中超耐磨炭黑。     

NR/NBR并用胶硫化体系的研究

考察了几种典型硫化体系及硫黄／ 促进剂 Ｃ Ｚ／ 促进剂 Ｄ Ｍ 配合对 Ｎ Ｒ／ Ｎ Ｂ Ｒ 并用胶硫化胶力学性能的影响。结果表明,采用普通硫化体系、半有效硫化体系的效果明显优于有效硫化体系及无硫黄硫化体系。通过正交试验对硫黄／ 促进剂 Ｃ Ｚ／ 促进剂 Ｄ Ｍ 的配合进行了初步研究,发现硫黄／ 促进剂 Ｃ Ｚ／ 促进剂 Ｄ Ｍ 以１０／１０／０ 配合可使并用胶硫化胶各项力学性能获得良好的平衡。     

NBR/聚丙烯酸酯橡胶共混物动态硫化的研究

ＮＢＲ的溴化酚醛树脂硫化体系和聚丙烯酸酯橡胶（ＡＣＭ）的硫化剂ＡＢＳ会相互干扰，产生硫化不相容性，导致ＮＢＲ，ＡＣＭ和ＮＢＲ／ＡＣＭ共混物性能下降。通过在ＮＢＲ／ＡＣＭ共混物中加入溴化酚醛树脂对ＮＢＲ进行动态硫化，然后加入ＡＢＳ对ＡＣＭ进行静态硫化的方法，能够较好地解决这两种不相容硫化体系的相容性问题，所得到的共混物表现出良好的物理性能，且优于相应的静态硫化共混物。同时考察了ＮＢＲ／ＡＣＭ的共混比对共混物性能的影响。     

导电炭黑在NBR中的应用研究

对导电炭黑（ＣＳＦ）作为ＮＢＲ的填料时，其填充量、硫化时间和增塑剂用量等因素对ＮＢＲ／ＣＳＦ混炼胶加工性能和硫化特性及硫化胶物理性能和电性能的影响进行了研究，并与乙炔炭黑（ＡＣＥＴ）进行了对比。结果表明，随着ＣＳＦ用量的增大，混炼胶的炭黑结合ＮＢＲ量、门尼粘度［ＭＬ（１＋４）１００℃］、屈服强度和拉伸强度均增大，扯断伸长率和挤出膨胀率降低，挤出物外观变优，焦烧时间和正硫化时间延长，硫化速度放慢，硫化胶的物理性能有所降低，导电性能提高；硫化胶体积电阻率随硫化时间延长和施加负荷的增大而降低，随温度升高和增塑剂ＤＯＰ用量增大而升高。ＮＢＲ／ＣＳＦ混炼胶的结合橡胶量、门尼粘度和混炼胶应力应变性能及硫化胶导电性能等均高于ＮＢＲ／ＡＣＥＴ混炼胶。     

硫黄与MOCA对聚丁二烯型PU的双重硫化

研究了硫黄和３,３′二氯４,４′二氨基二苯基甲烷（ＭＯＣＡ）对聚丁二烯型ＰＵ［又称端羟基液体聚丁二烯（ＨＴＬＰＢ）型ＰＵ,简称ＨＴＬＰＢ型ＰＵ］的双重硫化体系。根据ＨＴＬＰＢ中含有羟基官能团和分子链中含有双键的特点,考察了用其端基和双键共同硫化的协同效应。结果表明,当用硫黄与ＭＯＣＡ进行双重硫化时,硫化胶的物理性能比单独使用ＭＯＣＡ或硫黄硫化时高,在预聚物中游离—ＮＣＯ质量分数为００２４,硫黄用量为０８份,ＭＯＣＡ用量在占理论用量的８０％时,硫化胶的物理性能最佳。     

望远镜橡塑装饰包皮的研制

介绍了望远镜橡塑装饰包皮的胶料配方设计、生产工艺和产品性能。望远镜橡塑装饰包皮胶料的主体材料采用ＮＢＲ／ＰＶＣ（并用比８３／１７）并用体系;硫化体系由硫黄（１－２５ 份） 和促进剂ＴＭＴＤ（０－２９ 份）、促进剂ＤＭ（０－４２ 份）、促进剂Ｍ（０－４２ 份）组成;增塑剂选用增塑剂ＤＢＰ（８－３ 份）;黑色胶料的防老剂选用防老剂２２４６（１－６ 份）,非黑色胶料的防老剂选用防老剂２６４（２－０ 份）;黑色胶料的补强填充剂选用ＨＡＦ／ＧＰＦ（并用比８３／１７） 并用体系,非黑色胶料的补强填充剂选用白炭黑／ 陶土（ 并用比７５／１７）并用体系。ＮＢＲ 的塑炼采用低温、小辊距和低容量的三段塑炼法;ＮＢＲ与ＰＶＣ的共混采用常温共混工艺;混炼胶的威氏塑性值控制在０－２８～０－３０ 之间;制品在平板硫化机上硫化完毕后,再在１６０～１７０ ℃的烘箱中热处理１５～３０ ｍｉｎ。胶料物理性能良好,成品性能满足设计要求。     

橡胶并用及其硫化体系（3）

２．７　氯化丁基橡胶（ＣＩＩＲ）橡胶通过氯化可与各种橡胶进行并用。表２６为ＣＩＩＲ／ＳＢＲ（丁苯橡胶）并用的无硫硫化体系。图３为表２６中含不同硫化体系并用胶的物理性能，图中①～⑦编号与表２６的配方编号相对应。表２６　ＣＩＩＲ／ＳＢＲ并用与硫化体系配　方　编　号①②③④⑤⑥⑦ＣＩＩＲ／ＳＢＲ１００／０７５／２５２５／７５７５／２５５０／５０５０／５０２５／７５硫化体系　氧化锌５５５５５５５　促进剂ＴＭＴＤ１１１．５０．１５０．１５０．１５０．１５　促进剂ＤＭ２１１１．５１．５１．５１．５　促进剂Ｔ…     

长效耐湿高增粘剂TKM系列产品的性能及增粘作用

研究了增粘剂 Ｔ Ｋ Ｍ 系列产品（ Ｔ Ｋ Ｍ Ｍ, Ｔ Ｋ Ｍ Ｔ和 Ｔ Ｋ Ｍ Ｏ） 对 Ｎ Ｒ／ Ｓ Ｂ Ｒ 胶料硫化特性、硫化胶物理性能和增粘性能的影响。结果表明,增粘剂 Ｔ Ｋ Ｍ 系列产品对胶料的硫化特性和硫化胶的物理性能没有明显影响;通过进行室温暴气试验、湿热老化试验和热老化试验证明,增粘剂 Ｔ Ｋ Ｍ 系列产品具有显著的长效、耐湿热和高增粘的特性。     

HNBR/NBR共混物的静态硫化

研究了混炼工艺、硫化体系、氢化丁腈橡胶（ＨＮＢＲ）的饱和度及并用比对ＨＮＢＲ／丁腈橡胶（ＮＢＲ）共混物性能的影响,并通过ＴＥＭ和ＤＭＡ考察了共混物的结构和相容性。结果表明,混炼工艺对性能的影响水大;采用质量份分别为过氧化二异丙苯４、硫黄０．３和促进剂ＣＺ１．５的硫化体系,选择饱和度为９５％的ＨＮＢＲ与ＮＢＲ共混,共混物有较好的物理机械性能和热空气老化性能;共混物物理机械性能随ＨＮＢＲ用量的增加面提     

复合硫化体系对ACM/NBR共混胶性能的影响

分别采用TCY/硫黄、3#硫化剂/硫黄/促进剂、皂/硫黄/促进剂3种复合硫化体系硫化ACM/NBR共混胶。研究不同复合硫化体系、TCY用量和硫黄用量对ACM/NBR共混胶硫化特性、力学性能、耐热老化性能、耐油性能和压缩永久变形性能的影响,结果表明,TCY/硫黄复合硫化体系硫化的ACM/NBR共混胶的综合性能优于3#硫化剂/硫黄/促进剂和皂/硫黄/促进剂复合硫化体系,当TCY/硫黄的用量为1.5/0.3份时,ACM/NBR共混胶具有良好的综合物理机械性能。     

丙烯酸酯橡胶的研究与应用

采用丙烯酸酯类单体通过乳液聚合制备了丙烯酸酯橡胶（ＡＣＭ）。试验研究了ＡＣＭ硫化胶的性能。结果表明,ＡＣＭ引入—ＣＯＯＨ基团,用环氧树脂作硫化剂,可以实现高温快速硫化,且其硫化胶性能良好;增大带有柔性基团的单体（增塑剂）的比例,可以改善ＡＣＭ硫化胶的耐低温性;增大极性大的单体（丙烯腈）的比例,可以改善ＡＣＭ硫化胶的耐油性和耐热性。ＡＣＭ与氟橡胶（ＦＫＭ）并用初步研究结果显示,ＦＫＭ的用量在５０份以上时,并用硫化胶性能接近ＦＫＭ     

共混比对ACM／FKM共混胶性能的影响

采用硫化剂TCY为共硫化剂,研究了共混比对丙烯酸酯橡胶／氟橡胶共混胶的硫化特性、力学性能、耐热老化性能和耐油性能的影响。结果表明：TCY可以同时硫化两种橡胶;ACM／FKM共混比为20／80时．硫化胶具有较好综合力学性能和耐热老化性能;随着ACM用量的增加,硫化胶耐油性能逐渐下降。     

TCY/TRA复合硫化体系对ACM/ECO共混胶性能的影响

分别采用TCY/TRA和TCY/NA-22两种硫化体系硫化 ACM/ECO共混胶.研究了不同硫化体系、TCY用量和TRA用量对ACM/ECO共混胶的硫化特性,力学性能、耐热老化性能、耐油性能和高温压缩xxx永久变形性能的影响.结果表明,TCY/TRA硫化体系能使ACM/ECO共混胶实现共硫化;其用量为1.5份/1.5份...     

硫化剂TCY对丙烯酸酯橡胶的硫化特性

研究了硫化剂ＴＣＹ对丙烯酸酯橡胶（ＡＣＭ）的硫化特性。通过改变硫化温度,分析了硫化反应活化能,并研究了硫化剂及助硫化剂在不同用量下的硫化特性和硫化胶性能。试验结果表明,硫化剂ＴＣＹ对活性氯型ＡＣＭ具有低温快速硫化能力,其硫化反应活化能为６０５２ｋＪ·ｍｏｌ－１;添加少量硫黄作为ＡＣＭ的助硫化剂,可有效提高胶料的硫化速度和交联度,硫化胶的综合性能良好     

聚酯/聚醚混合型增塑剂对乙烯丙烯酸酯橡胶性能的影响

研究不同牌号乙烯丙烯酸酯橡胶(AEM)及聚酯/聚醚混合型增塑剂种类和用量对硫化胶性能的影响。结果表明:AEM Vamac G硫化胶的耐低温性能较好,而AEM Vamac GLS硫化胶的物理性能、耐老化性能和耐油性能较好,选择并用比为50/50的AEM Vamac G/AEM Vamac GLS并用胶作为主体材料,硫化胶的物理性能、耐油性能和耐低温性能可更好地平衡;添加增塑剂TP-759的硫化胶的耐低温性能较好,添加增塑剂RS-735的硫化胶的耐热老化性能较好,两者耐油性能相当;随着增塑剂用量的增大,硫化胶的耐低温性能提高,拉伸强度降低,拉断伸长率和压缩永久变形增大,油浸泡后体积变化率减小。     

Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate‐g‐butadiene rubber

Polyglycidylmethacrylate grafted butadiene rubber (PGMA‐g‐BR) was synthesized by a graft solution copolymerization technique. The PGMA content was determined through titration against HBr. The PGMA‐g‐BR was blended with styrene butadiene rubber/butadiene acrylonitrile rubber (SBR/NBR) blends with different blend ratios. The SBR/NBR (50/50) blend was selected to examine the compatibility of such blends. Compatibility was examined using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and viscosity measurements. The scanning electron micrographs illustrate the change of morphology of the SBR/NBR rubber blend as a result of the incorporation of PGMA‐g‐BR onto that blend. The T_gs of SBR and NBR in the blend get closer upon incorporation of PGMA‐g‐BR 10 phr, which indicates improvement in blend homogeneity. The intrinsic viscosity (η) versus blend ratio graph shows a straight‐line relationship, indicating some degree of compatibility. Thermal stability of the compatibilized and uncompatibilized rubber blend vulcanizates was investigated by determination of the physicomechanical properties before and after accelerated thermal aging. Of all the vulcanizates with different blend ratios under investigation, the SBR/NBR (25/75) compatibilized blend possessed the best thermal stability. However, the SBR/NBR (75/25) compatibilized blend possessed the best swelling performance in brake fluid. The effect of various combinations of inorganic fillers on the physicomechanical properties of that blend, before and after accelerated thermal aging, was studied in the presence and absence of PGMA‐g‐BR. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1559–1567, 2006     

Influence of rubber composition on change of crosslink density of rubber vulcanizates with EV cure system by thermal aging

Variation of the crosslink density of a rubber vulcanizate depending on the rubber composition after the thermal aging was studied with single rubber, biblend, and triblend vulcanizates of natural rubber (NR), butadiene rubber (BR), and styrene‐butadiene rubber (SBR). The efficient vulcanization (EV) system was employed to minimize the influence of free sulfur in the vulcanizate on the change of the crosslink density. Thermal aging was performed at 40, 60, and 80°C for 20 days with 5‐day intervals. The crosslink densities of the vulcanizates after the thermal aging increase. For the single rubber vulcanizates, variation of the crosslink density by the thermal aging has the order: SBR > BR > NR. For the biblend vulcanizates, variations of the crosslink densities of the NR/SBR and SBR/BR blends are larger than that of NR/BR blend. Variation of the crosslink density of the vulcanizate increases by increasing the SBR content in the vulcanizate. Variation of the crosslink density of the rubber vulcanizate depending on the rubber composition was explained by miscibility of the blends, combination reaction of the pendent groups, and mobility of the pendent group. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1378–1384, 2000     

Effects of rubber curing ingredients and phenolic-resin on mechanical,thermal, and morphological characteristics of rubber/phenolic-resin blends

This article examines the physical and mechanical characteristics of mixtures of two different synthetic rubbers, namely styrene-butadiene rubber (SBR) and nitril-butadiene rubber (NBR), with novolac type phenolic-resin (PH). According to Taguchi experimental design method, it is shown that the addition of PH increases the crosslinking density of rubber phase probably due to its curative effects. Thermal analysis of the blends indicates that, contrary to NBR/PH blend, thermal stability of SBR/PH blend is dependent on sulfur content due to predominant polysulfidic crosslinks formed in SBR. Slight shift in glass-transition temperature (T_g) of pure SBR and NBR vulcanizates by the addition of PH suggests that both SBR/PH and NBR/PH are incompatible blends with a partially soluble PH in the rubber phase. Two-phase morphology of the mixtures is also evidenced by scanning electron microscopy. Correlation of the rubber/PH modulus versus PH concentration by Halpin-Tsai model shows a deviation from the model. Presence of PH in the rubber phase is thought to vary the mechanical properties of the rubber phase by changing both the crosslinking density and rigidity of the molecular network of the rubber, leading to misuse of modulus of pure rubber in Halpin-Tsai equation. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008