防老剂RD的质量改进技术

从防老剂RD的反应机理，分析了防老剂RD聚合体的分子结构与其抗热氧老化，抗屈挠龟裂性能的关系。以及影响防老剂RD质量的主要因素。并且通过研究改进。使防老剂RD质量达到国外先进水平。     

国产防老剂RD的性能

本文介绍了国产防老剂RD的性能,其防老性能与西德Bayer公司的RD相近;亦与防老剂D等通用防老剂相近。它是具有优异抗热氧老化性能的防老剂,与其它防老剂并用于轮胎胶料中,具有优良的抗龟裂性,可以弥补其动态性能欠佳的不足。     

复合型防老剂8PPD在橡胶中的应用

用热空气老化和热分析的方法，考察了复合型防老型８ＰＰＤ对天然橡胶、顺丁橡胶和丁苯橡胶的热氧化防护性能，并与防老剂Ｄ，ＲＤ，４０１０ＮＡ和４０２０进行了对比，实验结果表明，防老剂８ＰＰＤ对ＮＲ，ＢＲ和ＳＢＲ的热氧化防护能力优于防老剂Ｄ和ＲＤ，接近防老剂４０１０ＡＮ和４０２０。防老剂８ＰＰＤ对３种橡胶的硫化特性有一定的影响。     

防老剂8PPD对橡胶天候老化的防护作用

通过自由、弯曲及静拉伸三种状态户外老化试验．考察了复合型防老剂８ＰＰＤ对天然橡胶（ＮＲ）、顺丁橡胶（ＢＲ）和丁苯橡胶（ＳＢＲ）的天候老化防护性能．并与防老剂Ｄ，ＲＤ，４０１０ＮＡ和４０２０进行了对比。实验结果表明，调整防老刘８ＰＰＤ的用量，可使其对ＮＲ，ＢＲ和ＳＢＲ的弯曲和拉伸应力状态下天候老化防护能力大大优于防老剂Ｄ和ＲＤ．接近或超过防老剂４０１０ＮＡ和４０２０。８ＰＰＤ的耐久性好于本试验用其它防老剂。     

新型防老剂J01取代防老剂RD的应用试验

防老剂Ｊ０１在单用和并用体系中可以取代防老剂ＲＤ，其耐老化性能优异。     

新型胺类防老剂

介绍合成的新型防老剂的性能和应用，它和其他防老剂的并用。     

天然橡胶的热氧老化研究

为了改善天然橡胶的热氧老化性能，试验了防老剂D提纯品和工业品对天然橡胶热氧老化性能的影响，调试了其热氧化诱导期、热失重、热老化的性能变化。结果表明：含杂少纯度高的防老剂D使天然橡胶的抗热氧老化得到改善。     

新型防老剂“D-50”和“复合二号”在轮胎胶料中的应用

研究了新型防老剂“Ｄ－５０”和“复合二号”用于轮胎胎面胶和胎侧胶时胶料的物理机构性能和老化性能。试验结果表明，用防老剂“Ｄ－５０”和“：复合民”替代防老剂ＲＤ和部分代替防老剂４０２０，綦昆炼胶硫化特性基本保护不变，对加工性能无明显影响，而硫化物胶物理性能也相差不大，个别性能如强伸性能还有所提高。     

天然橡胶抗热氧老化性能的快速评价

采用差示扫描量热法考察了天然橡胶硫化胶的抗热氧老化性能,得到氧化反应的表观活化能、反应速率常数（KT）和氧化诱导期（ti）,并与热空气老化箱试验结果进行了对比。结果表明,KT和ti能够表征天然橡胶硫化胶的抗热氧老化性能,所得结果与热空气老化箱试验结果一致。含苯胺类防老剂和对苯二胺类防老剂复配物的天然橡胶硫化胶的抗热氧老化性能较好。     

防老剂WH-02对NR胶料热氧老化的防护

防老剂ＷＨ－０２对ＮＲ胶料硫化特性的影响较防老剂４０１０ＮＡ，Ｄ和Ａ小，对ＮＲ胶料在自由状态和应力状态下的热氧老化防护性能优于防老剂Ａ，与防老剂４０１０ＮＡ和Ｄ相当，在ＮＲ胶料中防老剂ＷＨ－０２的用量为０．５－２．０份较好。     

环己烷-正丁醇-甲苯三元体系加压相平衡研究

研究了环己烷、正丁醇、甲苯这类醇烃体系的加压汽液平衡行为.根据环己烷、正丁醇、甲苯有关二元体系求得的Wilson能量参数及统一关联式,预测了环己烷-正丁醇-甲苯三元体系在101～911kPa5个压力下的汽液平衡数据,与实测值符合良好.     

Influence of binary combined systems of antioxidants on the stabilization of peroxide‐cured low‐density polyethylene

The secondary antioxidants Irganox 168 and 242 and dilaurylthiodipropionate (didodecyl‐3,3′‐thiodipropionate) (DLTP) were chosen to be combined with the primary phenol antioxidants Irganox 300, 1010, 1035, and 1076, and the effects of the binary combined systems of antioxidants on the peroxide curing reaction and the long‐term stability of crosslinked low‐density polyethylene (XLPE) were studied through isothermal dynamic rheological and mechanical testing. The results show that the primary phenol antioxidants with lower melting points had better resistance to scorching and exhibited good synergistic effects with the secondary antioxidants. Irganox 168 had little resistance to scorching, whereas Irganox DLTP had moderate resistance, and Irganox 242 had the greatest resistance. Irganox 168 and DLTP guaranteed the mechanical properties well, whereas Irganox 242 reduced the tensile strength obviously. Irganox 300 and 1035 combined with secondary antioxidants performed poorly in long‐term thermal aging test, whereas Irganox 1076 in combination with secondary antioxidants displayed a moderate effect of aging resistance, and Irganox 1010 showed the best effect. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2012     

醇/烃系统的分子热力学(Ⅱ)1-2-4模型应用于汽液平衡

建立了1个醇/烃系统的分子热力学模型,用红外光谱法获得的醇的标准缔合常数应用于汽液平衡,能够很好地区分醇类缔合物质的化学作用和物理作用,所得化学参数和物理参数具有明确的物理意义.计算表明:本文提出的1-2-4缔合模型在应用1个二元可调参数的情况下能较好地描述含醇系统的汽液平衡性质.即使对于不同链长的正构醇采用统一的缔合常数,同样可获得较好的结果.     

2-(2-喹啉偶氮)-1,3-二羟基苯吸光光度法测定钒的研究

研究了新显色剂2 (2 喹啉偶氮) 1,3 二羟基苯(QADHB)在阳离子表面活性剂十六烷基三甲基溴化铵(CTMAB)存在下,与钒(V)的显色反应条件。试验结果表明,在pH3.5的柠檬酸 氢氧化钠缓冲介质中,该显色剂可与钒(V)形成生成2∶1稳定配合物。在550nm波长处配合物的表观摩尔吸光系数ε=7.79×104L·mol-1·cm-1,钒含量在0～15μg/25mL内符合比尔定律。该法用于几种合金样品中钒的分析,结果令人满意。     

新型水基波峰焊助焊剂的研究

研制了一种以水作溶剂的波峰焊助焊剂。根据助焊剂各组份的特点，分别对其活性剂、表面活性剂、成膜剂以及添加物进行筛选。依据标准对所制备的助焊剂进行性能测试。结果表明：该助焊剂各方面都符合国家标准，并且无卤化物，无刺激性气味，环保，安全，节省成本。最后对该助焊剂在波峰焊中的应用给出一些意见。     

N-（2-乙酰苯基）-2，5-二甲基吡咯的合成及其在卷烟加香中的应用研究

以邻氨基苯乙酮和2,5-己二酮为原料,通过Paal-Knorr反应合成了一种新型的N-取代吡咯衍生物N-（2-乙酰苯基）-2,5-二甲基吡咯。通过IR、^1H NMR、^13 CNMR、HRMS等波谱方法对产物结构进行了确证,并研究N-（2-乙酰苯基）-2,5-二甲基吡咯的热稳定性以及在300℃、600℃和900℃的热裂解行为。结果表明,温度对合成物质的热裂解产物种类和含量有较大影响．裂解产物主要包括邻氨基苯乙酮、吡啶衍生物、醇等,其中含有多种致香物质,能够有效改善卷烟吸味,增强烟香。     

Phenolic antioxidants – radical‐scavenging and chain‐breaking activity: A comparative study

Fifty phenolic antioxidants (AH) (42 individual compounds and 8 binary mixtures of two antioxidants) were chosen for a comparative analysis of their radical‐scavenging (H‐donating) and chain‐breaking (antioxidant) activity. Correlations between experimental (antiradical and antioxidant) and predictable (theoretical) activities of 15 flavonoids, 15 hydroxy cinnamic acid derivatives, 5 hydroxy chalcones, 4 dihydroxy coumarins and 3 standard antioxidants (butylated hydroxytoluene, hydroquinone, DL ‐α‐tocopherol) were summarized and discussed. The following models were applied to explain the structure‐activity relationships of phenolic antioxidants of natural origin: (a) model 1, a DPPH assay used for the determination of the radical‐scavenging capacity (AH + DPPH? → A? + DPPH‐H); (b) model 2, chemiluminescence of a model substrate RH (cumene or diphenylmethane) used for the determination of the rate constant of a reaction with model peroxyl radicals (AH + RO₂? → ROOH + A?); (c) model 3, lipid autoxidation used for the determination of the chain‐breaking antioxidant efficiency and reactivity (AH + LO₂? → LOOH + A?; A? + LH (+O₂) → AH + LO₂?); and (d) model 4, theoretical methods used for predicting the activity (predictable activity). The highest lipid oxidation stability was found for antioxidants with a catecholic structure and for their binary mixtures with DL ‐α‐tocopherol, as a result of synergism between them.     

炼化企业污水场“三泥”处理技术研究

炼化企业污水处理过程中会产生大量的“三泥”，三泥成分复杂，有机物含量高，有恶臭味及毒性的物质，严重污染环境而且处理难度大，其处理问题一直困扰着石化企业及环保工作者。本文综述了国内外“三泥”处理技术现状，并指出了“三泥”资源化处理的应用前景。     

BFe30-1-1铜合金的化学抛光工艺研究

研究以含硝酸的化学抛光液对BFe30-1-1铜合金进行化学抛光的方法,考察光亮剂的种类、缓蚀剂的种类、化学抛光液各组分的含量、抛光温度以及抛光时间对铜合金抛光效果的影响。结果表明,在实验范围内优化工艺条件为:350～450 mL/L H2SO4,3～5 mL/L HCl,30～40 mL/L HNO3,2～4 mL/L辛基酚聚氧乙烯醚(OP-10),3 g/L苯骈三氮唑(BTA),水余量,抛光温度30℃左右,抛光时间3～5 min。在此工艺条件下对BFe30-1-1铜合金进行化学抛光,可以获得较好的抛光效果。     

A review of antioxidant analysis in food products

To permit proper usage of antioxidants by the food processor and permit control under applicable governmental regulations, it is necessary to have adequate analytical methods. Such methods should both positively identify and provide a quantitative assay for the additive. Due to the complex nature of foods, analysis of an antioxidant in the very small quantities used presents a very real problem. Solvent extraction and/or steam distillation techniques are employed to separate the antioxidants from the food. Ultraviolet spectra, gas chromatography and colorimetric techniques are used to identify and determine the quantity of each antioxidant present. Slight variations are necessary for each type of food.