全球橡胶工业展望

正据国际橡胶研究组织统计,2019年全球橡胶需求量为28740kt,与去年同期相比下降1.5%。据国际货币基金组织(IMF)预测,2020年全球橡胶需求量将略有回升,增长率预计为2.6%,2021年需求量增幅预计达2.8%。2018年全球天然橡胶消费量为13760kt,增幅4.1%,2019年全球天然橡胶需求量略有下降,     

顺酐生产技术及市场分析

2003年全球顺酐生产能力约1 3Mt/a,消费量为1Mt,国内近几年顺酐消费量逐年增长,预计2005年顺酐需求量将达到24 8万t。分析了顺酐生产技术进展及国内外市场现状,提出了我国顺酐发展的建议。     

近期我国甲醇、二甲酯新建工程

能源是经济发展的重要决定因素，世界能源已成为各国关注的重点。甲醇既是重要的化工原料（碳一化学的基础产品），又是重要的能源。目前全球的30多个国家都建有甲醇企业，总产能达到46950kt／a，预计2010年的产能将达到51000kt／a。2005年世界甲醇需求量为33200kt，甲醇市场供应量约为34100kt；预计2006年世界甲醇需求量为38000kt，2010年将达到42260kt。     

世界特种合成纤维现状

<正>随着防弹衣料需求量增加，特种合成纤维每年以近10％速度增长，2004年全球PAN碳纤维总需要量达到22 kt，其中日本3.6 kt，北美3.8kt，欧洲6.5 kt，其它5.1 kt。预计2005年碳纤维世界需求将达到24.6 kt，其中日本3.9 kt，北美7.5 kt，欧洲7.3 kt，其他5.9 kt(见表1)。     

中国拉伸缠绕膜市场分析

通过调查研究，介绍了国内拉伸缠绕膜的生产、供应、需求现状和发展前景。近几年国内加工缠绕膜的设备多为进口，由于盲目上马，加工能力过剩45％以上。2004年国内产量85kt，进口量30kt，需求量115kt；预计到2010年国内产量将达到230kt，进口量40kt，需求量270kt。     

全球顺酐需求年增速为3．7％

预测数据显示，2015年前，全球顺酐需求将继续以每年3．7％的速度增长。 预计欧洲顺酐需求增速与GDP增速保持一致，通常会低于美国需求增速。美国增速预计为每年2．5％～3％。东欧需求增速预计为每年49／6。     

全球橡胶工业展望

据国际橡胶研究组织统计,2019年全球橡胶需求量为28740kt,与去年同期相比下降1.5%。据国际货币基金组织(IMF)预测,2020年全球橡胶需求量将略有回升,增长率预计为2.6%,2021年需求量增幅预计达2.8%。     

2011年全球碳纤维会议在华盛顿召开

<正>2011年12月5～7日在华盛顿举行的"2011碳纤维会议"上,与会者对碳纤维产量、市场需求及未来应用产生了浓厚的兴趣。据介绍,2011年全球碳纤维的需求量是45.8 kt(航天航天7 kt,产业29.8 kt,包括风能,消费品/体育用品9 kt)。预计到2020年全球碳纤维需求量将     

顺酐市场分析与发展趋势

顺酐可广泛应用于合成树脂、涂料、农药、润滑油、医药、纸张处理剂、食品添加剂等领域。全球顺酐供需基本平衡 ,需求量稳步增长 ,2 0 0 0年全球顺酐产量达到 1 0 0万t,预计到 2 0 0 3年年增长率保持在 5 1 %。扣除 1 ,4 丁二醇的影响 ,到 2 0 0 5年我国国内顺酐需求量将为 1 2 6万t。目前我国顺酐生产能力已达到 1 6万t/a,但是大多生产装置规模小 ,工艺落后 ,将被淘汰。国内顺酐进口量呈逐年上升趋势 ,但是进口量所占比重较小。受原料和技术限制 ,国内生产技术仍然以苯法为主     

硫磺与硫酸市场分析与展望

介绍了全球和中国硫磺、硫酸生产、消费及需求情况。2012年全球硫磺需求量56500kt,供应总量53200kt;硫酸贸易量16500kt。2012年中国硫资源（以S计）表观消费量约30000kt,其中硫磺约14000kt;2012年中国硫酸表观消费量约85000kt,主要用于磷肥、钛白粉、氢氟酸、己内酰胺、粘胶纤维等生产。由于硫酸产能过剩、需求不旺引发的市场低迷仍将持续,预计未来2—3年中国硫磺和硫酸市场难有大的改观。     

国内外偏苯三酸酐市场供需分析和预测

2002年全球偏苯三酸酐的生产能力为20.3万t/a,我国的产能为1.7万t/a,全球的消费量约14万t。分析了国内外偏苯三酸酐的市场供需状况,并对我国今后几年的需求进行了分析和预测。     

Thermal and dynamic mechanical characterization of polypropylene‐woodflour composites

The performance of wood particle/polypropylene (PP) composites with modified compatibilities was compared. Woodflour modification was performed by esterification with maleic anhydride (MAN) and a non‐commercial maleic anhydride‐polypropylene copolymer (PPMAN) was selected as compatibilizing agent. The thermogravimetric analysis indicates that the onset of thermal degradation of treated woodflour occurs at lower temperature than that of the untreated one, and the same behavior was found in the corresponding composites. Differential scanning calorimetry indicated that both woodflours acted as nucleating agents for PP, while only treated woodflour induced PP crystallization in β‐phase in the composites. X‐ray diffractometry demonstrated that the crystallization in β‐phase was a shear‐induced phenomenon favored by the chemical modification of the woodflour surface. Dynamic mechanical studies suggested that composite properties decreased at concentrations higher than 40 wt% of woodflour and that the overall performance of MAN‐treated woodflour composites was lower than that of the composites where a compatibilizing agent was added.     

Mechanical characterization of polypropylene–wood flour composites

The mechanical performance of different wood flour/polypropylene (PP) composites with interface modifications was compared. Wood flour was incorporated into the matrix after esterification with maleic anhydride (MAN) or without any modification but with the addition of a compatibilizing agent [maleic anhydride–polypropylene copolymer (PPMAN)] to modify the polymer–filler interaction. Composites were prepared by injection molding with different concentrations of wood flour. Mechanical properties (except Young's modulus) were not improved either by the wood flour chemical modification or by the use of PPMAN. However, both compatibilization methods were successful in improving the dispersion of the wood flour in the PP matrix. Creep behavior of composite samples was improved by the addition of PPMAN, whereas the composites prepared from MAN‐treated wood flour showed larger deformations than composites made with untreated particles. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 1420–1428, 2003     

Physical and Morphological Properties of Combined Treated Wood Polymer Composites by Maleic Anhydride and Methyl Methacrylate

Wood polymer composites were prepared by consecutive impregnation with maleic anhydride (MAN) and methyl methacrylate (MMA). Samples impregnated with MAN alone, were heated at 120°C and 150°C for 4 and 8 h. Based on the Fourier transform infrared (FT-IR) analysis and soaking-drying test results, treatment with MAN at 150°C for 4 h resulted in formation of stable crosslinks. In the second stage, MMA was used for in situ polymerization within MAN-treated wood. Field emission scanning electron microscopy observation and FT-IR analysis indicated that MMA copolymerized with MAN, and the resultant polymer filled up the lumen and is also grafted on to the cell wall. Improvement of water repellency and dimensional stability were observed in the treated samples, particularly in combined treated samples. The MAN/MMA treatment improved interaction between polymer and wood.     

顺丁烯二酸酐市场分析及产业发展建议

分析国内外顺丁烯二酸酐的生产消费现状和市场情况，提出发展我国顺丁烯二酸酐生产的一些建议。     

我国顺酐行业发展的新趋势

2004年下半年以来国际油价迅速攀升,使我国以焦化苯为原料生产顺酐的产业获得空前机会。其发展速度也是世界上空前的。文章对我国顺酐的消费结构及发展趋势,对行业的发展趋势进行了分析、预测。     

Coupling reactions of activated oligo(ɛ-caprolactone)s

Summary Oligo(ɛ-caprolactone)s functionalised with acid groups were prepared by reacting hydroxyl terminated oligo(ɛ-caprolactone)s with succinic anhydride, maleic anhydride or glutaric anhydride. Quantitative conversion of the hydroxyl functionality was achieved in the melt at 130 °C. The resulting acid terminated oligo(ɛ-caprolactone)s were characterised by ¹H and ¹³C NMR spectroscopy. The reactivity of these oligomers was enhanced by conversion of the acid functionality in an acid chloride functionality using thionyl chloride or an anhydride functionality using acetic anhydride. It was shown that these activated oligo(ɛ-caprolactone)s can be used for coupling reactions with compounds containing alcohol- or amino functionalities. Received: 26 October 1998/Revised version: 21 December 1998/Accepted: 3 February 1999     

Microwave radiation copolymerization in solid state of maleic anhydride and allylthiourea

Microwave radiation copolymerization of maleic anhydride and allylthiourea was studied in solid state. Composition of the monomer feed and the power and time of microwave radiation on conversion and intrinsic viscosity were discussed. Reactivity ratios for maleic anhydride and allylthiourea were also determined. Values of r₁ and r₂ were 0.875 and 0.650 for maleic anhydride and allylthiourea, respectively. The copolymer can be used as soluble macromolecular complexing agents for metal ions. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 1563–1566, 1998     

热稳定剂生产现状及需求预测

热稳定剂是重要的塑料加工助剂之一。 1 999年北美、西欧、日本共消费热稳定剂约 31万t,分别约为 8万、1 6万、7万t。北美有机锡和复合金属类热稳定剂各约占 40 % ,铅盐低于 2 0 % ;西欧铅盐热稳定剂占 60 % ,而复合金属类占 30 % ,有机锡类低于 1 0 %。预计 1 999～ 2 0 0 4年北美热稳定剂需求量为 1 0万t,年均增长率 4 2 % ;西欧为 1 7万t,年均增长率 1 0 % ;日本需求量维持约 7万t。复合金属类 (尤其是无毒Ca/Zn)的增长高于平均增长率 ,而铅盐将基本不变或呈负增长。 1 999年我国热稳定剂产能约 9万t/a ,产量 7 65万t。我国PVC工业的快速发展为热稳定剂行业提供广阔的发展空间 ,预计到 2 0 0 5年需求量将达到约 1 6万t。热稳定剂行业向高效、低毒、复合型、无污染方向发展已成总趋势。建议积极发展复合金属盐和有机锡类热稳定剂 ,特别是利用资源优势发展稀土类热稳定剂。