压延、挤出、硫化、注压

介绍了压延、挤出、硫化和注压4种橡胶加工工艺的基本设备组成、重点结构部件、工艺原理及过程、加工中的注意事项、技术参数、各种常见故障及消除措施等。另外对这4种加工工艺的发展趋势和优缺点作了介绍和评价。     

新材料、新技术、新产品、新设备

化工防腐协会将开会推广新技术新型防腐蚀涂料及涂装新技术、新产品是当前环保及绿色奥运的需要 ,为适应这一要求并确保防腐蚀施工质量 ,中国化工防腐蚀技术协会将于 2 0 0 2年 11月 5日～ 8日在北京召开全国防腐蚀涂料及涂装新技术、新产品交流推广会议。会议将对防腐蚀涂料行业发展近况及有关行业对防腐蚀涂料发展的要求等进行交流研讨 ,并将对防腐蚀涂料的新技术与新产品、涂装新技术与新设备、涂料用新材料等进行技术交流推广。会议期间还将展示有关防腐蚀涂料产品、涂装设备、涂料与涂装检测仪器等 ,并进行转让、合作、产品贸易洽谈。…     

肥料中砷、镉、铅、铬、汞生态指标

范围 本标准规定了肥料中砷、镉、铅、铬、汞生态指标要求、试验方法及检验规则。 本标准适用于中华人民共和国境内生产、销售的肥料。     

肥料中砷、镉、铅、铬、汞生态指标

范围 本标准规定了肥料中砷、镉、铅、铬、汞生态指标要求、试验方法及检验规则。本标准适用于中华人民共和国境内生产、销售的肥料。     

ICP-AES法测定污泥中铝、钙、铜、铁、镁、锌等元素

污泥中除了含有大量丰富的有机物及氮、磷等营养元素之外,还含有很多难以降解的金属元素。如果处理不当将会造成更严重的二次污染。采用在盐酸,硝酸,氢氟酸及双氧水条件下对样品进行微波消解,而后高氯酸冒烟处理样品的方式,采用电感耦合等离子体原子发射光谱对污泥中铝、钙、铜、铁、镁、锌等元素进行检测。选择合适的分析谱线,标准曲线线性系数大于0.999 9。     

水合肼的发展、现状、展望

重点介绍水合肼的生产工艺及技术进展。水合肼的生产工艺主要有拉西法、尿素法、酮连氮法和过氧化氢法 4 种,前 2 种方法存在设备投资和能耗较高等缺点,在国外已较少使用。酮连氮法和过氧化氢法具有无盐类副产物、无环境污染、原料成本及能耗低、产物收率及纯度高等优点,代表了水合肼生产工艺的发展方向。     

ICP-OES法测定碱式碳酸铜中 钠、铁、铅、锌、钙、铬、镉、砷

提出了用电感耦合等离子体发射光谱法（ICP-OES）测定碱式碳酸铜中钠、铁、铅、锌、钙、铬、镉、砷等杂质含量。对测定条件及工作参数进行了研究,采用钇标准溶液内标法消除基体干扰,通过选择适宜的分析谱线以消除光谱干扰。与原子吸收分光光度计法（AAS）相比,此方法分析速度快、精密度高。     

团结、奋进、务实、创新

<正>唐山兴宇橡塑工业有限公司是制造、销售再生胶和汽车、农用车、工程车内胎及垫带等橡胶制品的专业高新技术企业,2011年8月被国家发改委批准确定为国家"城市矿产"示范基地,是中国橡胶工业协会主席团成员单位,中国轮胎翻新及循环利用协会副会长单位,河北省产业集群龙头企业,中国废旧橡胶循环利用示范单位。公司设备一流、技术先进、采用现代化管理制度,备有完善的质量保证     

ICP-AES法测定油田水中钾、钠、钙、镁

采用ICP-AES法同时测定了大庆油田水中钾、钠、钙、镁4种常量金属元素的含量.研究了酸度效应及元素间的相互干扰情况,并进行了检出限、准确度及精密度试验.结果表明,线性相关系数大于0.999,加标回收率为95.4%～104.0%,相对标准偏差为0.56%～11.14%,均可满足要求.方法具有样品前处理简单,干扰少,测定...     

2014年中国国际塑料 新材料、新技术、新装备、新产品展览会

[参展范围]1塑料加工机械(挤出、注塑、中空吹塑、发泡、双拉、吹膜、流延、压延、拉丝、编织、复合印刷、制袋及混料等设备、开炼、密炼、压延、注射、挤压等设备)。2塑料制品加工所需的模具(基础模具、注射模具及其它相关模具等)。     

Span及Tween的组成、性能、表征与应用

本文综述了Span及Tween两类乳化剂的组成,性能,表征与应用进展及发展趋势。     

Isolation,identification, synthesis,and bioassay of the pheromone of the comstock mealybug and some analogs

The sex pheromone of the Comstock mealybug,Pseudococcus comstocki (Kuwana) was isolated from volatiles trapped from air passing over virgin female insects. Combined gas chromatography, mass and infrared spectroscopy, and microreactions indicated that the structure was 2,6-dimethyl-1,5-heptadien-3-ol acetate. This was confirmed by synthesis; several analogs were also prepared. The natural and synthetic pheromone caused similar trap capture of male insects. Synthetic analogs were significantly less attractive in field tests and the addition of minor amounts of the corresponding alcohol to the pheromone appeared to enhance trap capture, but the results were not statistically conclusive.     

Identification, Synthesis, and Field Testing of the Sex Pheromone of the Citrus Leafminer, Phyllocnistis citrella

The citrus leafminer is an important vector of citrus canker in many of the major citrus production areas of the world. (7Z,11Z)-Hexadecadienal was reported as a sex attractant for this insect in the 1980s, based on trap catches during pheromone screening trials in Japan. However, attempts to reproduce this work in other areas of the world have not been successful. We report here that (7Z,11Z)-hexadecadienal is only one component of the pheromone, with the other critical component being the analogous trienal, (7Z,11Z,13E)-hexadecatrienal. Both compounds were identified in the effluvia from live female moths by coupled gas chromatography (GC)-electroantennography using nonpolar and polar GC columns, and the identifications were confirmed by comparisons of mass spectra with those of authentic standards. Stereoisomers of the two compounds, and a number of analogs, were synthesized to confirm the identifications. In field trials, neither compound alone was attractive to male moths, but blends of the two were highly attractive, with thousands of insects being caught per trial. Addition of the isomeric (7Z,11Z,13Z)-hexadecatrienal inhibited attraction to the two-component blend. Electronic Supplementary Material Supplementary material is available for this article at and accessible for authorized users. This paper and the preceding paper (Leal et al.) were submitted within a few days of each other. The editors and the authors agreed that they should be published in tandem.     

Effect of concentration, temperature, moisture, liming and organic matter on the efficacy of the nitrification inhibitors benzotriazole, o-nitrophenol, m-nitroaniline and dicyandiamide

Laboratory experiments were carried out to study the effect of various factors that affect the efficacy of the nitrification inhibitors, benzotriazole, o-nitrophenol, m-nitroaniline and dicyandiamide. In a Paleustalf, increasing concentrations of the inhibitors from 0 to 15 mg/kg soil prolonged the nitrification up to 60 days. Increase in temperature from 10 to 30°C decreased the efficacy of all four nitrification inhibitors (by 6–62% at 30 days). Benzotriazole was equally effective in soil moisture conditions ranging from 40 to 80% of the maximum water holding capacity of the soil (WHC). o-Nitrophenol and m-nitroaniline were more effective at 60% WHC, while the efficacy of DCD was more at 40% WHC. Addition of 1000 mg/kg soil of fresh organic matter reduced the efficacies of o-nitrophenol, m-nitroaniline and benzotriazole by 55, 65 and 22%, respectively while the reduction in the efficacy of dicyandiamide was non-significant. Liming an acidic soil (Kandiustalf) to change the pH from 5.4 to 8.3 decreased the efficacies of the nitrification inhibitors and decreased the ammonium content in the soil at 30 days from 55 to 9 mg/kg in case of o-nitrophenol and m-nitroaniline and from 53 to 35 mg/kg in case of benzotriazole and dicyandiamide.     

纳米粒子的分散机理、方法及应用进展

分析了纳米粒子团聚机理,并介绍了纳米粒子分散理论、方法,包括机械法和表面改性法,尤其详细地介绍了表面改性的方法,如：无机物改性纳米粒子表面、有机物改性纳米粒子表面、有机．无机复合改性纳米粒子表面,并介绍了相应的应用成果。     

Identification, Synthesis, and Field Evaluation of the Sex Pheromone from the Citrus Leafminer, Phyllocnistis citrella

Using male antenna as the sensing element, three electroantennographic detection (EAD)-active peaks were detected from pheromone gland extracts of the citrus leafminer, Phyllocnistis citrella. Based on gas chromatography (GC)-mass spectrometry and GC-infrared data, the semiochemicals were tentatively identified as a novel pheromone, (Z,Z,E)-7,11,13-hexadecatrienal, a previously identified attractant, (Z,Z)-7,11-hexadecadienal, and (Z)-7-hexadecenal in a ratio of 30:10:1, respectively. Identification was confirmed with synthetic compounds, which gave retention times identical to those of the natural products on three capillary columns with polar and nonpolar phases. While traps baited only with the previously identified attractant alone did not catch any males in Brazil, binary and tertiary mixtures with the major constituents caught significantly more male moths than traps baited with five virgin females. This paper and the following paper (Moreira et al.) were submitted within a few days of each other. The editors and the authors agreed that they should be published in tandem.     

Comparison of the munsell,NCS, DIN,and coloroid colour order systems using the OSA-UCS model

An earlier article described the use of a colour notation conversion program to measure the accuracy of the NCS, DIN and OSA-UCS color atlases. This article describes the application of the same program to compare the perceptual scaling of the Munsell, NCS, DIN, and Coloroid systems with that of the OSA-UCS system. Five OSA-UCS cleavage planes were selected which represent a varied but systematic sampling of OSA-UCS colour space. The samples contained on these planes were converted onto the colour spaces of the Munsell, NCS, DIN and Coloroid systems. The converted points have been displayed graphically for ease of comparison.     

Characterization of the seed oil and meal from apricot,cherry, nectarine,peach and plum

The oil and meal from apricot, cherry, nectarine, peach and plum seeds were characterized for their physico-chemical properties. The wt% seed/fruit ranged from 2.8–7.6% and the wt% kernel/seed ranged from 6.8–31.6%. Kernel moisture ranged from 38.8–72.4%. The proximate composition of whole seeds on a dry weight basis ranged from 1.3–6.9% protein, 0.6–14.5% fat, 51.0–72.3% fiber, 0.4–1.2% ash, and 18.1–27.9% carbohydrate (by difference). The kernels contained 41.9–49.3% fat, and the resulting meals contained 31.7–38.7% protein. The major fatty acids were oleic (52.9–66.3%) and linoleic (26.8%–35.0%). The major essential amino acids were arginine (21.7–30.5 mmoles/100 g meal) and leucine (16.2–21.6), and the predominant nonessential amino acid was glutamic acid (49.9–68.0). The iodine values ranged from 105 to 113, hydroxyl value from 5.5 to 7.0 and the unsaponifiables from 0.56–0.80%. The mineral composition (Cu, Fe, Ca, Mg, Zn, P) was also determined on the meals.     

Evaluation of the etching and chrome plating on the ABS,PVC, and PVC/ABS blends surface

As replacement for acrylonitrile‐butadiene‐styrene (ABS), which is commonly used in the manufacture of chrome parts, polyvinyl chloride (PVC) and PVC/ABS blend parts were produced by injection process, etched in sulfochromic solution in different concentrations, immersion time, and temperature, and they were subsequently chrome‐plated by conventional method. After etching, the sample surfaces were analyzed by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), roughness, and contact angle, and compared with the ABS surface. The metal deposition was assessed by visual inspection and adhesion test. The roughness influenced the adhesion of the metal layer directly. The chemical etching increased the surface wettability. To achieve a good metal layer adhesion, higher temperatures, immersion time, and etching solution concentration were necessary. A concentration of 350 g/L chromic acid and 400 g/L sulfuric acid, a 70 °C temperature and a 15 min immersion time resulted in good adhesion in PVC and PVC/ABS blends. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44571.     

The introduction of alkyl,ester, carboxylate,amino, hydroxyl,and phosphate functional groups to the surface of polyethylene

The surface of polyethylene was derivatized with ester, carboxylate, amino, hydroxyl, and phosphate functional groups. α, ω bifunctional alkanes, containing on one end a primary amine, were coupled to oxidized polyethylene through an amide linkage. Polyethylene was first oxidized with chromic acid, the carboxylate groups were converted to the acyl chloride with phosphorus pentachloride, and then reacted with a primary amine to give the covalently bound amide. The copposing ends of the bifunctional alkanes were the methyl, tertiary amine, ester, and hydroxyl groups. The ester was converted to the carboxylate by acid cleavage and the hydroxyl group converted to the phosphate by treatment first with phosphorus oxychloride and then aqueous base. Attenuated total reflection FTIR, XPS, and pH-dependent contact angle wetting were used to characterize the surfaces. The FTIR data were used to confirm the formation of the amide and to detect an undesired carboxylate/ammonium ion complex formed in the presence of trace amounts of water. XPS data were used to confirm expected changes in elemental composition and to provide quantitative estimates of the yields. Oxidation of the polyethylene introduced 5 × 10¹⁴ carboxylate groups/cm² in the 25 Å XPS sampling depth. Of these, up to 98% could be converted to the amide. The advancing contact angle data confirmed the acid/base behavior of the functional groups.