专利：包含聚酰胺嵌段和聚醚嵌段的抗老化共聚物

本发明涉及基于一种共聚物的组合物,该共聚物含有均聚或共聚酰胺的聚酰胺嵌段（PA嵌段）（排除全芳香PA嵌段）和聚醚嵌段,该组合物包括：a）500-10000ppm的至少一种酚类抗氧化剂;b）0—5000ppm的至少一种基于磷或基于硫的抗氧化剂;c）0—5000ppm的至少一种UV吸收剂;     

提高嵌段共聚PP冲击强度的措施探讨

介绍了生产嵌段共聚聚丙烯(PP)的工艺和改善冲击强度的机理,分析了影响嵌段共聚PP冲击强度的主要因素：二聚物的含量、结构及其特性粘数;提出了3条提高嵌段共聚PP冲击强度的措施：提高嵌段共聚PP的键合乙烯量、降低气相比以及控制二聚物特性粘数在适当的范围。     

北方石油化学公司正式生产聚丙烯嵌段共聚物

用于电池组、仪器和其他注模制品的嵌段共聚物,正由北方石油化学公司大量生产。该公司生产聚丙烯已有近两年的历史,但以前是集中生产均聚物和无规共聚物。     

新型烯烃嵌段共聚物

来自Dow公司的一种瓶型烯烃嵌段共聚物（OBC）以其独特的嵌段结构突破了烯烃热塑性弹性体的局限。该材料不仅具有优异的可加工性，而且在成本方面能够与TPV TPU和TPE一较高下，在众多应用领域中显示出独特的优势。[编者按]     

丙烯与极性单体嵌段共聚合的研究进展

综述了近年来聚丙烯基嵌段共聚物合成方法的研究进展。通过选用合适的Ti催化剂能够直接催化丙烯与降冰片烯和/或甲基丙烯酸甲酯进行聚合,从而通过活性聚合的方式直接得到聚丙烯基嵌段共聚物。合适的聚合条件下,链转移剂的加入能够在聚合过程中产生金属―C键,再经氧化酸化后得到末端羟基,实现聚丙烯的端基功能化。将端基功能化与可控自由基反应、点击反应、偶联反应相结合能够得到聚丙烯基嵌段共聚物。通过催化剂的结构优化设计,配合合适的链转移剂,能够调控聚丙烯基嵌段共聚物的结构。     

高功能嵌段共聚物工业化

据“1988,25(3),9”报道,日本三菱油化公司开发出利用光聚合法制造高功能嵌段共聚物的生产技术。 该公司以甲基丙烯酸酯类、丙烯酸类、苯乙烯类的乙烯基化合物为分子主链段,以     

管材用嵌段共聚聚丙烯专用助剂开发

研究了嵌段聚丙烯聚合工艺、乙烯含量对其基本性能的影响,冷热水管材专用助剂对嵌段聚丙烯性能的影响,研究表明:聚合工艺决定了嵌段聚丙烯的分子结构,乙烯含量对抗冲性能影响明显,助剂使嵌段聚丙烯的耐候性能、弯曲模量、抗冲击性能明显提高。     

无规共聚PP与嵌段共聚PP共混的研究

用IR、DSC、SEM和力学性能测试方法研究了一种无规共聚PP（PP-R）和一种嵌段共聚PP（PP-B）及其共混物的结构与性能。结果表明,PP-R和PP-B都能结晶,但PP-B结晶较慢、结晶度较低;PP-R不含而PP-B含有呈球粒状分散的乙丙橡胶（EPR）相和乙烯嵌段（PE）相;随共混物中PP-B含量增加,常温和低温冲击韧性显著提高,力学强度在略有下降后能持平或回升,这些性能变化是上述PP-R、PP-B结构特点的一种综合效应。     

聚己内酰胺嵌段共聚物

聚己内酰胺嵌段共聚物据“Ｒｕｂｂｅｒｗｏｒｌｄ，１９９３，２０８（８）：１７”报道，工程热塑性弹性体聚己内酰胺嵌段共聚物，可有效地应用于注射成型中，其商品名为Ｎｙｒｉｍ。由于它具有独特的ＡＢＡ嵌段结构，橡胶相和聚己内酰胺相可通过化学键合，使该材料具有...     

陶氏推出烯烃嵌段共聚物弹性体

英国《欧洲橡胶杂志》2006年188卷4期13页报道： 陶氏化学公司推出一种以嵌段共聚物技术为基础的新型烯烃弹性体。这种烯烃嵌段共聚物（OBC）产品的商品名为Infuse。     

一种盐酸液稠化剂的合成及性能评价

以二甲基二烯丙基氯化铵（DMDAAC）、丙烯酰胺（AM）、2-甲基-2．丙烯酰胺基丙磺酸（AMPS）、阳离子单体x为共聚单体,总单体含量为30％,采用水溶液聚合方法制得了一种四元共聚物BC-13。性能评价表明,该聚合物可直接用作盐酸稠化剂,其酸溶性好,溶胀时间为25min;90℃下恒温2h,0．8％的Bc．13可以使酸液粘度保留率达90％;剪切稳定性好;具有良好的抗盐性能;与其它酸液添加剂配伍性良好。     

银耳菌糠衍生的三维多级孔炭及其电化学应用性能

食用菌菌糠富含疏松多孔的木质纤维基质和菌丝残体蛋白,将其用于高性能生物质基多孔炭的制备具有先天优势,亦能产生可观的生态和经济效益。本文以银耳菌糠为原料,利用NaOH/尿素（质量比为7∶12）水溶液体系进行冻融预处理后,经高温热解炭化制备获得高氮掺杂量（7.78%）的三维（3D）多级孔炭材料。孔结构分析结果显示样品BC-5-800的比表面积可达1568m²/g,孔容为1.53cm³/g且中孔率高达83%。以BC-5-800为工作电极,在三电极测试体系中,当电流密度为0.5A/g时,测得的比电容为278F/g,且在10A/g下仍能保持230F/g的比电容;在两电极装置中,当功率密度高达6990W/kg时,能量密度达到5.83Wh/kg,且经10000次循环充放电后的电容保持率为87%,呈现出优异的循环稳定性。本研究为食用菌菌糠的高值化回收再利用提供了新思路。     

工业循环冷却水用BC－653杀生剂的抗菌性能测定

本文对ＢＣ－６５３杀生剂进行了室内抗菌实验，着重阐述了投药量对杀菌率的影响。结果显示该杀生剂与国外同类产品杀菌力基本一致。     

Bacterial Cellulose Membrane Containing Epilobium angustifolium L. Extract as a Promising Material for the Topical Delivery of Antioxidants to the Skin

Bacterial cellulose membranes (BCs) are becoming useful as a drug delivery system to the skin. However, there are very few reports on their application of plant substances to the skin. Komagataeibacter xylinus was used for the production of bacterial cellulose (BC). The BC containing 5% and 10% ethanolic extract of Epilobium angustifolium (FEE) (BC-5%FEE and BC-10%FEE, respectively) were prepared. Their mechanical, structural, and antioxidant properties, as well as phenolic acid content, were evaluated. The bioavailability of BC-FESs using mouse L929 fibroblasts as model cells was tested. Moreover, In Vitro penetration through the pigskin of the selected phenolic acids contained in FEE and their accumulation in the skin after topical application of BC-FEEs was examined. The BC-FEEs were characterized by antioxidant activity. The BC-5% FEE showed relatively low toxicity to healthy mouse fibroblasts. Gallic acid (GA), chlorogenic acid (ChA), 3,4-dihydroxybenzoic acid (3,4-DHB), 4-hydroxybenzoic acid (4-HB), 3-hydroxybenzoic acid (3-HB), and caffeic acid (CA) found in FEE were also identified in the membranes. After topical application of the membranes to the pigskin penetration of some phenolic acid and other antioxidants through the skin as well as their accumulation in the skin was observed. The bacterial cellulose membrane loaded by plant extract may be an interesting solution for topical antioxidant delivery to the skin.     

不同担载量介微孔复合分子筛加氢脱硫催化剂性能研究

以ZSM-5/KIT-1(ZK-1)介微孔复合分子筛为载体,采用浸渍法分别制备了金属担载量为8%Mo3%Co,16%Mo6%Co,20%Mo7%Co和24%Mo8%Co的加氢脱硫催化剂。利用X射线衍射(XRD)、N2吸附脱附分析、紫外可见漫反射(UV-vis)表征手段分析其结构;以3%(wt)的CS2/环己烷溶液为硫化液,500×10-6的二苯并噻吩/十氢萘溶液为原料液,在小型固定床反应器中评价催化剂的加氢脱硫反应活性。实验结果表明ZSM-5/KIT-1介微孔复合分子筛作为加氢脱硫催化剂载体具有优异的反应性能。当催化剂的担载量达到20%Mo7%Co时,表现出最佳的加氢脱硫反应活性,脱硫率为93%,高于相同反应条件下的商业用催化剂。     

Effect of pulse electromagnetic coupling treatment on thermal conductivity of WC-8Co cemented carbide

In this study, investigations were conducted focusing on the WC-8Co cemented carbide. A dry turning test of TC4 titanium alloy with WC-8Co cemented carbide tool treated by pulsed electromagnetic coupling treatment (PEMCT) was conducted. Tool wear was observed and analyzed using a scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS). The thermal conductivity of WC-8Co cemented carbide before and after the PEMCT was measured using Hotdisk thermal conductivity analyzer. The finite element software, DEFORM, was used to simulate the cutting process, and the stable cutting temperature range was obtained. The high-temperature oxidation test was conducted in a muffle furnace to study the effect of the PEMCT on the oxidation resistance of WC-8Co cemented carbide. This study obtained the effect of the PEMCT on the thermal conductivity of tungsten cobalt cemented carbide. The results show that the PEMCT can reduce the adhesive, diffusion, and oxidation wear of the tools, thus, improving the wear resistance and service life of the tools. The PEMCT improves the thermal conductivity and diffusivity of WC-8Co cemented carbide. Moreover, the oxidation resistance of WC-8Co cemented carbide in high-temperature conditions can be improved.     

Colloidal Co nanoparticles supported on SiO2: Synthesis, characterization and catalytic properties for steam reforming of ethanol

Colloidal Co nanoparticles with sizes in the 3–8 nm range were obtained by thermal decomposition of Co₂(CO)₈ in the presence of ligands and impregnated on SiO₂ to prepare SiO₂-supported Co nanocatalysts. The catalysts showed activity for the steam reforming of ethanol with higher values for smaller Co particles. H₂ adsorption results and Fourier transform infrared spectroscopy of adsorbed CO suggested that the fraction of accessible Co sites also depended on the synthesis conditions. Precipitation of the Co nanoparticles with methanol instead of ethanol before impregnation had a positive effect on the density of accessible Co sites to catalysis; similar result was verified by increasing the thermal treatment temperature under H₂ flow before the reaction. Based on the distribution of products with temperature of reaction, a mechanism for steam reforming of ethanol on SiO₂-supported Co nanocatalysts is suggested.     

注浆堵水技术的应用实践

从注浆方案的选取、注浆材料及配比、参数的确定、注浆工艺、注浆效果等五个方面介绍了东升庙矿区注浆堵水技术的成功经验．对同类矿山具有一定的指导作用。     

Co nanoparticle hybridization with single-crystalline Bi nanowires

ABSTRACT: Crystalline Co nanoparticles were hybridized with single-crystalline Bi nanowires simply by annealing Co-coated Bi nanowires at elevated temperatures. An initially near-amorphous Co film of 2-7 nm in thickness began to disrupt its morphology and to be locally transformed into crystallites in the early stage of annealing. The Co film became discontinuous after prolonged annealing, finally leading to isolated, crystalline Co nanoparticles of 8-27 nm in size. This process spontaneously proceeds to reduce the high surface tension and total energy of Co film. The annealing time required for Co nanoparticle formation decreased as annealing temperature increased, reflecting that this transformation occurs by the diffusional flow of Co atoms. The Co nanoparticle formation process was explained by a hole agglomeration and growth mechanism, which is similar to the model suggested by Brandon and Bradshaw, followed by the nanoparticle refinement.     

一步水热法制备高效析氧3D花球阵列Co9S8/MoS2@TM催化电极

以四水合钼酸铵、六水合硝酸钴和硫脲为原料,采用一步水热法在钛网(TM)上原位构筑了不同阵列结构Co9S8/MoS2@TM催化电极.通过改变原料中钴、钼、硫的物质的量之比来调控Co9S8/MoS2@TM电极的结构.采用SEM、XRD和XPS对Co9S8/MoS2@TM进行物相分析和形貌表征,并在1 mol/L KOH电解...