含多巯基化合物的白炭黑填充橡胶复合材料及其制备方法

<正>多巯基化合物的白炭黑填充橡胶复合材料及其制备方法,属于橡胶配方和工艺技术领域。含多巯基化合物的白炭黑填充橡胶复合材料,其特征在于:包括不饱和橡胶或其并用胶100份,白炭黑10～100份,多巯基化合物0.01～10份,按双键:巯基摩尔比0.01:1     

3-巯基噻吩化学研究进展

较为详细的对3-巯基噻吩的制备方法进行了综述.同时介绍了3-巯基噻吩发生的一些典型反应,重点介绍3-噻吩硫基化合物分子内环合生成噻吩并含硫杂环化合物这一类反应.最后展望了3-巯基噻吩及其衍生物在医药化工及食品化学方面的一些应用前景.     

巯基化合物／乙烯基聚硅氮烷光固化体系的研究

采用三种巯基化合物作为含乙烯基聚硅氮烷(PSN-1)的光固化剂,研究了三种巯基化合物与PSN-1的反应动力学,并对光固化产物进行了热重分析.结果表明:巯基化合物/ PSN-1体系的反应速率与巯基浓度的一次方成正比,与乙烯基浓度无关,均为一级反应;四元巯基化合物比二元巯基化合物的初始反应速率快,而转化率偏低;四巯基季戊烷/PSN-1体系的陶瓷产率高达89%,更适合作先驱体转化法制备陶瓷材料的陶瓷先驱体.     

一种手性吡咯烷化合物及其制备方法

正本发明涉及一种手性吡咯烷化合物及其制备方法,该化合物用做多尼培南中间体,具体涉及化合物(Ⅸ)的制备方法。该化合物采用芳酰基保护巯基,用烯丙氧羟基保护氨基,制备溴代物,用磺酰胺基团取代,所制备的化合物工艺路线可行,能够实现工业化生产。该类化合物质量高,为片状结晶,容易提纯,并且可以用HPLC准确测定纯度,避免了使用滴定或     

2—巯基—5—二氟甲氧基苯并咪唑的制备新工艺

2-巯基-5-二氟甲氧基苯并咪唑是一种重要的医药中间体。本文简介了其早期的制备方法及新近开发的以对乙酰胺基苯酚为起始原料的制备新工艺。新工艺对早期制备方法中的一些工艺条件进行了改进,工艺流程短,原料价廉易得,更易实现工业化生产。     

用于检测巯基化合物的荧光探针的研究进展

巯基化合物在生物体内有着重要的生理作用,它的有效检测在病理学和生命科学领域具有非常重要的应用价值。依据荧光探针的结构,分类综述了可检测巯基化合物的荧光探针的研究进展。     

铂基有序纳米催化剂的制备方法研究进展

开发低成本长寿命的铂基催化剂是实现质子交换膜燃料电池商业化的关键。铂基金属间化合物具有原子有序的结构和独特的催化特性,被认为是燃料电池催化剂的理想选择。概述了铂基金属间化合物催化剂制备方法的最新进展,其中包括直接退火法、壳层辅助退火法、模板辅助退火法和溶剂热法,讨论了铂基金属间化合物催化剂在催化氧还原反应中的应用。分析得出：目前金属间化合物催化剂制备手段,还存在缺乏简单高效的制备方法和大规模可量产技术等缺点。因此,加快新型的金属间化合物催化剂制备方法的开发,对推进铂基有序催化剂的实用化具有重要意义。     

巯基硅胶固相萃取法结合GC-MS检测水中的甲基汞

目前检测环境中甲基汞的标准为GB/T 17132-1997,该标准采用巯基纱布和巯基棉二次富集的前处理方法测定水中的甲基汞,该方法中使用的巯基纱布和巯基棉需要用户自行制备,耗时费力,方法稳定性无法得到保证[5]。笔者利用巯基改性硅胶开发了固相萃取小柱Cleanert SH,以固相萃取的方法富集水中的甲基汞,然后用GC-MS检测。该方法操作简便,实验重现性效果良好,比GB/T 17132-1997具有更大的优势。     

2-巯基-5-甲氧基咪唑[4,5-b]并吡啶的合成工艺评价

2-巯基-5-甲氧基咪唑并[4,5-b]吡啶是合成新型咪唑并[4,5-b]吡啶类质子泵抑制剂的关键中间体.系统介绍了该化合物的合成方法,认为以2,6-二溴吡啶为原料的合成2-巯基-5-甲氧基咪唑并[4,5-b]吡啶,是值得重点开发的新工艺.     

2-巯基-3-苄氧基吡啶的合成

报道了超高效除草剂三氟啶磺隆的中间体2-巯基-3-苄氧基吡啶的合成方法。首先以2-氯-3-羟基吡啶(2)为原料,与溴化苄(3)在丙酮中反应制备2-氯-3-苄氧基吡啶(4);化合物4再与硫脲在无水乙醇反应得到2-巯基-3-苄氧基吡啶。总收率75.61%。     

带羟基邻苯二甲腈衍生物的自加速热聚合研究

利用酚类化合物与4-硝基邻苯二甲腈的亲核取代反应合成出了3种带羟基的邻苯二甲腈衍生物:4-(4-羟基苯氧基)邻苯二甲腈(化合物1),4-(4-羟基联苯氧基)邻苯二甲腈(化合物2)和2-(4-羟基苯基)-2′-(4-(3,4-二腈基苯氧基)苯基)丙烷(化合物3)。这类化合物无须外加催化剂,因而不会发生由于催化剂挥发或分解而使材料产生孔隙的问题。核磁共振氢谱(1H-NMR)和傅里叶转变红外光谱(FT-IR)的分析结果证实了所合成化合物的结构。利用示差扫描量热计(DSC)和热重分析(TGA)技术,对这3种邻苯二甲腈衍生物的热行为进行了对比研究。热分析研究显示出化合物3在290℃附近表现出与化合物1类似的自加速热聚合行为,而化合物2并未表现出明显的自加速热聚合反应行为。利用核磁共振氢谱技术(1H-NMR)分析了化合物1、2、3的酚羟基质子NMR化学位移,以研究分子结构与其自加速热聚合反应能力的关系。     

The Selective Removal off Nitrogenous-Type Compounds from Fuels by Using Zeolites

Abstract

Several zeolites were tested for the selective removal of nitrogenous compounds from an organic solution. A model compound study showed that the extent of sorption from a complex mixture is a function of the nature of the nitrogenous compounds. A correlation between the extent of sorption and the size of a compound suggests that diffusion is the controlling parameter. A capacity of 10 wt% was obtained for the model compound study. The zeolites were also tested for the removal of nitrogenous compounds from a coker naphtha and from a hydroprocessed naphtha. The low capacities relative to the model compound study of ?1 wt% and ?3 wt% obtained for the coker and the hydroprocessed naphthas, respectively, suggest the sorption of nonnitrogenous compounds.     

两种发酵酱油风味物质的分析研究

用固相微萃取-气质联用技术对低盐固态发酵酱油和高盐稀态发酵酱油的挥发性风味成分进行了分析,通过谱图检索,共鉴定了52种物质,醇类(16),酚类(7),醛酮(13),酸类(4),酯类(7),杂环化合物类(5)。26种成分在两种酱油中同时检出,形成酱油风味的主体成分是乙醇、2-甲基丁醇、2-甲基丙醇、苯乙醇、乙酸、2-甲基丁酸、糠醇。17种成分为低盐固态酱油特有,1-辛烯-3-醇为其中主要成分,具有浓郁的蘑菇香气;9种成分为高盐固态酱油特有,4-乙基愈创木酚为其中主要成分,是提高酱油香气的关键。     

Composition of petroleum heavy ends. 2. Characterization of compound types in petroleum >675 °C residues

The characterization of polar compound types in petroleum residues of b.p. >675 °C are described. The fractions of acids, bases, and neutral nitrogen compounds prepared by the method described in Part 1 (Fuel 1981, 60, 14) were further separated and analysed. Major compound types identified in the acid fraction are carboxylic acids, phenols, pyrrolic nitrogen compounds, and amides. Quantitative estimates of the compound types were made by two infrared methods. Major compound types identified in the bases were pyridine benzologs, amides, and pyrrolic nitrogen compounds; types found in the neutral nitrogen fraction were amides and pyrrolic nitrogen compounds. The average molecular weight of the >675 °C residues was estimated to be 900 after being determined by four different methods.     

铝系催化剂催化合成聚酯的性能研究

以5种含铝化合物为催化剂,采用对苯二甲酸二甲酯（DMT）路线合成聚酯,对聚合产物进行特性黏度、色值和DSC分析。结果表明：5种铝系催化剂的催化活性均低于常规催化剂,其中,铝酸钠的催化活性最高;铝系催化剂所得的聚酯的色相b值高于Sb2O3催化的聚酯的b值,但低于钛酸正丁酯催化的聚酯的b值;铝酸钠和硅酸钠复合后作为催化剂,不改变PET切片的等温结晶规律,且催化所得聚酯的结晶青色力比常规Sb2O3催化的聚酯略有提高;选择溶解性好的含铝化合物和减少催化剂用量对增加催化活性和改善聚酯色相有利。     

Ozone Assisted Biological Treatment Of Industrial Wastewaters Containing Biorefractory Compound

Ozone pretreatment studies of organic compounds that are difficult to biodegrade were conducted to evaluate the effects of ozonation on biodegradability of these compounds. Initial testing was conducted in batch activated sludge experiments with and without preozonation to evaluate the impacts of ozonation on the ultimate BOD/COD and ultimate BOD/TOC ratios of these compounds. Experimental results indicated wastewater preozonation to be an effective pretreatment step for some compounds, ineffective for other compounds and detrimental to biological treatment of still other compounds. These same compounds were then investigated in continuous flow, complete–mix activated sludge systems. Complete material balances, including influent, effluent, waste sludge and off–gas specific compound analyses, were conducted so that the actual fate of the compound could be determined. Removal mechanisms of the ozonated or unozonated compound were then determined to be biodegradation, stripping, or sorption to the biomass. Three compounds were investigated: acrylonitrile, 2,4 dinitrophenol, and 1,2 dichloropropane.     

Decomposition of Epoxy Model Compounds in Near‐Critical Water

Two tpyes of epoxy resin model compounds, one containing an ether bond and bisphenol‐A structure (compound I) and the other comprising ether and tertiary amine bonds (compound II), were prepared and then decomposed in near‐critical water (NCW). In the case of model compound I, at low temperatures the water molecules behave as nucleophilic reagent reacting with the terminal ether group of the model compound. When the temperature is increased, the middle ether bond of the model compound molecule can be broken down. As to model compound II, at lower temperatures, cleavage of the ether bond happens more easily than that of the tertiary amine bond because of higher positive charge density centered at the carbon atom in the ether group. At higher temperatures, the energy required to break down the ether bond is reduced dramatically after being protonated by H⁺, and therefore, the bond can be cleaved more readily than the tertiary amine bond. The decomposition products in both model compounds were found unstable and could react with each other to generate other compounds. Decomposition mechanisms were also proposed based on the decomposition products for the model compounds.     

动态拉伸疲劳对SBR胶料网络结构和物理性能的影响

研究动态拉伸疲劳对未填充SBR胶料和白炭黑填充SBR胶料网络结构和物理性能的影响.结果表明,随着拉伸疲劳次数的增加,SBR胶料的交联密度减小,且白炭黑填充SBR胶料的交联密度大于未填充白炭黑SBR胶料;拉伸疲劳后SBR胶料产生共轭的端二烯基结构;随着拉伸疲劳次数的增加,未填充和白炭黑填充SBR胶料的物理性能先提高后下降;拉伸疲劳后SBR胶料的弹性模量降低,高弹态温度区间内损耗因子增大.     

Adhesive properties of cured epoxide resin containing the intermolecular compound of 2,4-diamino-6-vinyl-s-triazine and isocyanuric acid

The intermolecular compound of 2,4-diamino-6-vinyl-s-triazine and isocyanuric acid was synthesized, and the glass transition temperature and the adhesive properties of the cured epoxide resin containing the above compound were studied. Epoxide reacted with amino groups of 2,4-diamino-6-vinyl-s-triazine and isocyanuric acid at the curing conditions of 150 to 180°C for 60 min and formed the cured compounds. The infrared spectra showed that epoxide reacted with isocyanuric acid in the presence of imidazole compounds and converted to 2-oxazolidinone compound on the curing process. The glass transition temperatures of the cured compounds having isocyanurate and 2-oxazolidinone rings in their structures were higher than that of the epoxide resin cured with imidazole and rise as the curing temperature rises, but fall as 2-oxazolidinone ring content increases in their cured compounds. The tensile shear and peel strengths of the steel and steel bonded with the cured compounds and the cured epoxide resin were measured at 25 and 150°C. The adhesive strengths were improved due to isocyanurate and 2-oxazolidinone rings formed in their cured compounds.     

N-(1,4-二取代吡唑-5-基)-1,2,3-噻二唑酰胺类化合物的合成与杀菌活性研究

设计合成了9个N-(1,4-取代吡唑-5-基)-1,2,3-噻二唑酰胺类化合物,测试了化合物对小麦赤霉病菌(Gibberella zeae)、辣椒枯萎病菌(Fusarium oxysporum)和苹果腐烂病菌(Cytospora mandshurica)的抑制活性。初步结果表明,目标化合物在50μg/mL浓度下对小麦赤霉病菌、辣椒枯萎病菌和苹果腐烂病菌有一定的抑制作用,其中化合物8j对小麦赤霉病菌的抑制率达到47.6%,接近对照药剂恶霉灵;化合物8d对苹果腐烂病菌的抑制率达到56.8%,与对照药剂恶霉灵相当,具有进一步研究的价值。