丙烯酸酯橡胶及其配方技术

１　前言　　丙烯酸酯橡胶是以丙烯酸烷基酯为主要单体的聚合物。其特征是耐热、耐油（润滑油）、耐候性优异,特别是耐热性仅次于氟橡胶和硅橡胶,使用温度可达１５０～１７５°Ｃ,此外成本也不太高,因此近年来消耗量日益增加。丙烯酸酯橡胶的基本性能与其主链结构和作为交联点的单体有密切关系,因此在配方设计时需对橡胶（聚合物）的结构和交联剂有足够的认识,同时还要考虑硫化胶物理性能和加工成型性能。本文主要介绍丙烯酸酯橡胶的基本性能、硫化体系的选择、配合各种填充体系橡胶的性能,以供拟定实用配方参考。２　丙烯酸酯橡胶的…     

丙烯酸酯橡胶制品的研制与应用

本文采用自制的丙烯酸酯橡胶,以新型硫化剂/促进剂为硫化体系,通过一次硫化制得了应用于汽车工业的一些密封件,并在J L462Q汽油机上作了应用试验。结果表明这一新型橡胶硫化体系具有硫化速度快,不需二次硫化等特点,硫化胶性能优良,制品性能达到了国外同类产品的性能指标,可以代替进口丙烯酸酯橡胶制备汽车密封件。具有广泛的推广应用价值。     

过氧化物—双烯烃硫化丙烯酸酯橡胶

讨论由丙烯酸丁酯与丙烯腈共聚型丙烯酸酯橡胶用过氧化物硫化时，二乙烯基苯的共交联效应。二乙烯基苯可提高过氧化物对丙烯酸酯橡胶的硫化速度及硫化胶的性能。     

耐低温橡胶的研究进展

综述了耐低温橡胶的研究进展,主要对氟橡胶、硅橡胶、丁腈橡胶、丙烯酸酯橡胶和聚氨酯橡胶的耐寒性性能及其改良方法进行了介绍,总结了目前提高橡胶耐低温性能的主要途径及对未来的发展方向提出一些看法,为制备耐低温橡胶提供参考。     

四种丙烯酸酯橡胶的性能比较

丙烯酸酯橡胶（ACM）是一种饱和主链结构的特种合成橡胶，由于结构中丙烯酸乙酯、丙烯酸丁酯等结构单元组成差异，导致不同型号的橡胶性能有所不同。本文对四种丙烯酸酯橡胶的硫化特性和物理性能进行了比较，为丙烯酸酯橡胶的合理选用提供了依据。     

辐射乳液聚合羧基型丙烯酸酯橡胶的性能评价

评价了辐射乳液聚合羧基丙烯酸酯橡胶的加工性能、力学性能、耐热空气老化性能、压缩永久变形以及耐油性能,并与国外牌号的丙烯酸酯橡胶进行性能对比。结果表明,辐射法丙烯酸酯橡胶加工性能优异,焦烧时间合适,硫化速度快,相对分子质量大,交联网络完整,其硫化胶力学性能和耐油性能优异;其热空气老化性能和压缩永久变形能与国外品牌丙烯酸酯橡胶媲美。     

丙烯酸酯橡胶加工配合助剂

随着我国汽车工业快速发展,对丙烯酸酯需求日益增加,本文综述了丙烯酸酯橡胶加工和配合助剂的应用,介绍了硫化剂、补强剂、防老剂、增塑剂、润滑剂、防焦剂、金属氧化物等对丙烯酸酯橡胶加工及其硫化胶性能的影响。     

乙烯丙烯酸酯橡胶的结构与性能

介绍乙烯丙烯酸酯橡胶的结构与性能、品种、配合加工特性。重点描述了乙烯丙烯酸酯橡胶的耐热、耐流体、耐臭氧及阻燃、阻尼性能。     

丙烯酸酯橡胶的应用与开发

<正> 1前言丙烯酸酯橡胶是指以丙烯酸烷基酯(如丙烯酸乙酯、丙烯酸丁酯)为主要成分的一类弹性共聚物,是一种新型功能高分子材料,具有较高的热稳定性,较小的透气性,较好的耐油、耐臭氧、耐老化、耐应力疲劳等性能。2生产方法丙烯酸酯橡胶以丙烯酸烷基酯为主,与少量功能单体共聚,以提供交联点。早期的交联单体为含卤素的不饱和化合物如氯乙基乙烯醚、氯乙酸乙烯等。目前世界各国生产的丙烯酸酯橡胶产品,基本上不用含氯单体而采用环氧基的单体,如     

丙烯酸酯橡胶

丙烯酸酯橡胶（简称ＡＣＭ）是由丙烯酸酯（如丙烯酸乙酯、丙烯酸丁酯等）与不饱和化合物（如丙烯腈、２－氯乙基乙烯基醚等）共聚而得的一种新型功能高分子材料,具有较高的热稳定性,较小的透气性,较好的耐油、耐臭氧、耐老化、耐应力疲劳等性能。工业上,丙烯酸酯橡胶的生产方法主要有悬浮聚合法和乳液聚合法两种。传统的汽车制件及密封垫片使用耐油、耐热的合成橡胶,其典型产品为丁腈橡胶和氯丁橡胶。由于长期使用温度以１２０℃为限,不适合现代车辆提高运行速度后的耐热要求。丙烯酸酯橡胶可在１７５℃下长期使用,也可在－３５℃下…     

加工助剂对丙烯酸酯橡胶硫化行为的影响

研究了吸酸剂MgO和新型增塑剂G41对丙烯酸酯橡胶硫化行为和机械性能的影响.结果表明,这两种加工助剂均可降低丙烯酸酯橡胶15%的正硫化时间;增塑剂G41还可有效降低丙烯酸酯橡胶的门尼粘度和脆性温度,扩大加工和使用范围,对胶料机械性能影响较小.     

硅灰石与纳米MoS2对丙烯酸酯橡胶摩擦磨损性能的影响

采用无转子硫化仪、环-块式摩擦试验机、电子和光学显微镜等分析表征手段,考察了硅灰石及其与纳米二硫化钼(MoS2)并用对丙烯酸酯橡胶(ACM)摩擦磨损性能的影响。结果表明,随着硅灰石用量的增加,改性ACM硫化胶的摩擦因数逐渐降低,而磨损体积呈现出先降低后升高的趋势;当硅灰石用量为35 phr时,硫化胶具有较小的摩擦因数和最好的耐磨性。在35 phr硅灰石改性ACM基础上添加1 phr纳米MoS2时,硫化胶的摩擦因数和磨损体积分别下降到0.4和1.54 mm3,表现出最低的摩擦因数和磨损体积,同时还保持较好的硫化和力学性能。纳米MoS2与硅灰石并用改性ACM时,硫化胶表现出轻微的磨粒磨损特征,磨损面平整光滑,形成的转移膜薄且完整均匀。     

Effect of carboxyl on vulcanization and mechanical properties of carboxylated acrylic rubber prepared by 60Co‐γ‐ray‐induced polymerization

Acrylic acid carboxylated acrylic rubber (ACM) and itaconic acid carboxylated acrylic rubber were prepared by ⁶⁰Co‐γ‐ray‐induced emulsion copolymerization. The polymers were characterized using FTIR and ¹³C NMR spectroscopies. The acid value was determined with nonaqueous titration method. The molecular weight and the polydispersity index of the polymers were measured using gel permeation chromatography. The influence of the cure‐site (carboxyl) on the vulcanization and mechanical properties of the ACM was researched by means of rheometric study, gel fraction analysis, mechanical property tests, and dynamic mechanical thermal analysis. The results show that the crosslink density of polymers increases with amounts of the carboxyl cure‐site. The itaconic acid carboxylated ACM has better cure characteristics and mechanical properties than the acrylic acid carboxylated ACM has. In addition, the comparison of ACM prepared by ⁶⁰Co‐γ‐ray‐induced polymerization with ACM prepared by chemical‐initiator‐induced polymerization has been investigated. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 5587–5594, 2006     

双交联型丙烯酸酯橡胶性能研究

<正>丙烯酸酯橡胶(ACM)是由丙烯酸酯单体(如丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯和丙烯酸-2-乙基己酯等)与功能化单体(丙烯腈、2-氯乙基乙烯基醚、丙烯酸或者马来酸酐等)进行自由基共聚而得到的一类特种橡胶。其主链为饱和碳链,侧基为极性     

Amphiphilic particulate phase semi-interpenetrating polymer networks based on recycled rubber matrix

The goal of this study is to enable the utilization of recycled rubber particles in aqueous media by producing amphiphilic particulate phase semi-interpenetrating polymer networks (PPSIPNs). Rubber granulates obtained from post-consumer rubber items were pulverized into fine particles using a solid state shear extrusion (SSSE) process. Reaction mixtures composed of toluene, acrylic acid (AA) monomer and azobisisobutyronitrile (AIBN) as an oil-soluble initiator were prepared and used to impregnate the produced rubber particles. Toluene was added as a co-swelling agent to induce more swelling of the rubber particles and, consequently, enhancement in the absorption of AA in the rubber network. The swollen particles were introduced into a micro-domain suspension polymerization reactor where the ionic strength of the aqueous phase was sufficient to prevent desorption of AA from the particles during the reaction. This resulted in formation and interpenetration of hydrophilic poly(acrylic acid) in the intermolecular structure of hydrophobic rubber network. The resulting composite particles are water dispersible and suitable for use in a variety of aqueous applications such as, additives to waterborne emulsions and vehicles for wastewater treatment.     

Dynamic mechanical properties of acrylic rubber blended with phenolic resin

The dynamic mechanical properties of blends of phenolic resin (PF) and acrylic rubber (ACM) were investigated. PF had good compatibility with ACM and played an important role in the damping of the ACM/PF blends. With the increase of PF content and molecular weight, the peak of loss factor (tan δ) of blends shifted to a higher temperature and became much wider, indicating the convenience to adjust the value of tan δ peak and the temperature range. Fourier Transform infrared spectroscopy detected that the intermolecular hydrogen bonding between the PF hydroxyl groups and the ACM carbonyl groups had made a great contribution to the improvement of damping. Compared with the organic small molecule used in our previous study, PF gifted the blends with equivalent damping performance and much better stability and a lower cost for the application of damping materials. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

The effect of polylactic acid (PLA)/poly‐d‐lactide stereocomplex on the thermal and mechanical properties of various PLA/rubber blends

This study investigated the effect of polylactic acid (PLA)/poly‐d ‐lactide (PDLA) stereocomplex (ST) on the improvement of the mechanical and thermal properties of various rubber‐toughened PLAs. In this work, natural rubber (NR), synthetic polyisoprene rubber (IR), silicone rubber (SI), acrylic rubber (ACM), acrylic core–shell rubber (CSR), thermoplastic copolyester (TPE) and thermoplastic polyurethane (TPU) were chosen as the toughening agents. 5 wt% PDLA was melt‐blended with PLA to form ST crystals in the presence of 15 wt% rubber in an internal mixer at 180 °C and 50 rpm. It was found that the melting temperature of ST crystal (T_m,sc) and the impact strength of ST/rubber blends were strongly correlated with the rubber domain size. For the blends of ST with compatible rubbers (ACM, CSR, TPE and TPU), the rubber domain sizes tended to be smaller with higher T_m,sc and higher impact strength than the blends with incompatible rubbers (NR, IR and SI). However, the presence of ST crystals in PLA/incompatible rubber blends, especially the blends with NR and IR, led to a significant increase in the rubber domain size and plunges in tensile toughness and impact strength. On the other hand, the presence of these crystals in PLA/compatible blends did not change the rubber size or the impact strength significantly compared with those without ST crystals except in the case of ST/ACM, which resulted in a large increase in the impact strength. Among all rubber types, CSR provided the highest impact strength for both the PLA and ST systems. © 2019 Society of Chemical Industry     

In situ preparation of reduced graphene oxide reinforced acrylic rubber by self-assembly

Reduced graphene oxide reinforced acrylic rubber (ACM/RGO) was in situ prepared via self-assembly method in the presence of hydrazine hydrate as reducing agent. X-ray diffraction and X-ray photoelectron spectroscopy confirmed the chemical structure of ACM/RGO, and transmission electron microscope and scanning electron microscope demonstrated that RGO was uniformly dispersed in ACM matrix. Due to the barrier role of RGO sheets, the resistances to heat and water of ACM/RGO were obviously improved. Furthermore, the mechanical properties were also largely affected by the incorporation of RGO. With 2 parts per hundred rubber of RGO, the tensile strength and Shore A hardness of ACM/RGO reached 18.8 MPa and 73, and the elongation at break maintained at 236%. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47187.     

Interfacial structure and performance of rubber/boehmite nanocomposites modified by methacrylic acid

Methacrylic acid (MAA) is investigated as a novel in situ interfacial modifier for styrene-butadiene rubber (SBR)/boehmite (BM) composite via a direct blending method. The reaction mechanism for the modification was revealed to be the BM/MAA coordination and MAA/rubber grafting reaction. The substantiated BM/MAA coordination can improve the dispersion of BM in rubber matrix. It is illustrated that the ultimate mechanical performance and interfacial interaction are significantly enhanced by the in situ modification. The strong interaction between BM and SBR and the improved dispersion of BM in the rubber matrix are responsible for the largely enhanced mechanical properties.     

Influence of interactions on the mechanical,morphological and thermal properties of in situ ternary composites based on fluorocarbon elastomer,acrylic elastomer and liquid crystalline polymer blends

The mechanical, morphological and thermal properties of the binary and ternary blends of a fluorocarbon elastomer (FKM), an acrylic elastomer (ACM) and a liquid crystalline polymer (LCP) were investigated. The ternary blends were prepared by varying the amount of the LCP but fixing the ratio of the FKM and ACM. Addition of a third component, a polyacrylic rubber which interacted with the LCP, facilitated the structural development of the LCP phase by acting at the interface. The mechanical properties of the ternary blends were substantially improved because of both the fibril generation and adhesion of rubber particles on the LCP fibrils, which were attributed to the ACM interaction. Morphological investigations suggest that the fine fibrillation of the LCP domains is more apparent in the ternary blends than in the binary blends of FKM and LCP prepared under the same processing conditions. Thermogravimetric analysis (TGA) revealed an improved thermal stability of the FKM in the presence of the LCP for the binary blends, but a lower thermal stability for the ternary blends. Copyright © 2005 Society of Chemical Industry