工业用苯乙烯纯度测定方法的探讨

探讨了苯乙烯纯度分析的方法，分析了在苯乙烯纯度测试过程中的各种影响因素，从中可以看出采用毛细管柱（尤其是大口径毛细管柱可以在要求准确，快速的常规中控分析中采用归一化法代替内标法进行定量，这在实际工作中有着非常重要的意义。     

我国橡胶产业发展现状及存在的问题

本文介绍了我国橡胶市场的发展状况。指出我国像胶产业发展较快，但也存在许多实际问题，比如品牌培育不力、严重依赖进口等，同时还指出我国橡胶市场发展前景广阔。最后提出了促进我国橡胶产业发展的几点策略。     

In search of a new industry: Giovanni Battista Pirelli and his educational journey through Europe, 1870–1871

Knowledge is increasingly considered a crucial resource for economic and business development. However, it is a broad concept that calls for further specifications: different kinds of knowledge call for diverse transfer and learning mechanisms, crucial for their application to economic activity. Focusing on the case of Giovanni Battista Pirelli (1848–1932) – Italian engineer and entrepreneur, founder (1872) of the first Italian rubber company, G.B. Pirelli & Co. – and his educational journey through Europe (1870–1871), this article investigates the complexity of the learning mechanism which in the second half of the nineteenth century allowed a relatively peripheral region like Northern Italy to reduce the gap separating it from the centre of European industrialization. Special attention is devoted to the characteristics of the rubber manufacturing industry and to the specific difficulties encountered in the acquisition and transfer of knowledge (including technology) related to a relatively new and rapidly evolving industry.     

我国丁苯橡胶生产现状及市场分析

本文综述了近年来我国丁苯橡胶的生产及市场情况。并对丁苯橡胶的市场发展趋势进行了分析和预测。     

高性能硅橡胶按键的制造

<正> 一、期货交易限制 从事商品期货交易的人最关心的是瞬间的价格波动,并以此来判断买进或卖出的时机。为有利于交易的正常进行,使市场在受到某种力量推动导致行市暴涨或狂跌时,可以停止交易,使交易者能有充分时间证实行情动态,证实消息并据以预测价位,以保障交易者在短时间内不受太大的损失,价格不出现剧烈的波动。所以,世界各大交易所对不同的期货商品价格有多种限制性规定。     

SMA类表面施胶剂对喷墨打印纸物理性能及打印性能的影响

随着表面施胶技术的不断发展,SMA类表面施胶剂凭借其优越的性能在现代造纸工业中的地位越来越重要。与传统表面施胶剂相比,它们具有成膜性好、打印质量佳等优点,特别适用于非涂布喷墨打印纸。本实验以美国Hercules和Sartomer公司不同型号SMA表面施胶剂为研究对象,对比研究SMA类施胶剂对纸张物理性能和喷墨打印性能的影响,以得出最佳的SMA表面施胶剂。结果表明,H520在改善纸张物理性能和喷墨打印性能方面要优于其他几种施胶剂,其成膜性好,可降低纸张透气度,提高平滑度和Cobb值,对纸张白度和不透明度影响较小;同时可提高打印色密度,扩大暗调阶调范围;灰度梯级为90％时,密度提高约0．2,墨点清晰度提高5．4％。     

Can carbon-trading schemes help to protect China's most diverse forest ecosystems? A case study from Xishuangbanna,Yunnan

Xishuangbanna has been largely transformed from biodiverse natural forests and mixed-use farms into monoculture rubber plantations in just twenty years. This conversion has expanded into forests previously protected by the community and onto marginal sites at high-elevation. Market-based ecosystem payments, especially carbon financing, are potential tools to prevent further forest loss in China. Here, we compare rubber net present value (NPV), carbon sequestration, and seed-plant species diversity for Xishuangbanna given three land-use scenarios: Business-As-Usual (BAU), Economic Oriented Scenario (EOS) and Conservation Oriented Scenario (COS) using a previously published spatial map of rubber profitability. The EOS achieved the greatest rubber profit but caused substantial reductions in natural forest area, biodiversity and carbon stocks. The EOS also requires substantial immigration of workers into a remote and ecologically important region with little social infrastructure for basic security, food security, health-care and education, causing frequently ignored costs. As expected, the COS will maintain the highest levels of natural forest area, sequester 57% more carbon, and 71% more biodiversity than EOS. Given the conservation value of the carbon stores and rich biodiversity residing in Xishuangbanna's natural forests, reducing rubber NPV only marginally would probably cost less than attempting to recover these resources. We recommend that rubber plantations be limited to established, productive lowland areas whilst protecting intact high-elevation forest and reforesting low-productivity plantations. These actions will enhance carbon sequestration and biodiversity conservation. Management policies focused solely on profits, like the EOS scenario, will fail to sustain the entire range of natural resources and ecosystem services. The prices in the carbon market would have to be considerably larger than they are currently to compete with the profitability of rubber.     

参加ISO/TC45第49届年会报告

主要介绍了ISO／TC45的组织结构现状，相关标准的出版情况，以及第49届年会的主要内容，并就如何参与国际标准化活动提出建议。     

丁二烯的生产技术及国内外市场分析

介绍了丁二烯主要生产工艺乙腈法(ACN法)、二甲基甲酰胺法(DMF法)和N-甲基吡咯烷酮法(NMP法)的技术特点,分析了国内外丁二烯的生产消费现状及发展前景,提出了发展我国丁二烯生产的建议.     

香料苯乙醛的清洁生产工艺

本文采用合成沸石催化环氧苯乙烷异构化生产香料苯乙醛,经过大量的试验,将该工艺用于工业化生产中,该工艺具有催化剂重复使用、废水零排放等优点,是绿色环境友好工艺。