25%粉唑醇SC防治小麦锈病的田间药效

<正>为了明确25%粉唑醇SC防治小麦锈病的田间药效,确定最佳使用剂量,我们进行了田间小区药效试验,试验结果如下。1材料与方法     

SbSn金属间化合物的制备及其脱硫性能

以Sb、Sn为原料,用机械合金化法制备了SbSn金属间化合物,用X射线衍射仪和透射电镜对其进行了表征。实验考察了球料比、球磨时间、球磨转速、原料比以及使用后的清洗方式对SbSn金属间化合物性能的影响;并考察了2种不同性质的乳状液对脱硫的影响。结果表明球料比10∶1、转速270r/min、球磨时间8h为最佳合成条件。在常温常压下对于油品中的噻吩,单程脱除率在9.7%左右,3次循环实验后脱硫率可以达到23%。     

聚氯乙烯基纳米复合材料最新研究进展

本文综述了聚氯乙烯基纳米复合材料的最新研究进展，介绍了聚氯乙烯基纳米复合材料的制备方法。聚氯乙烯基纳米复合材料集中了聚氯乙烯和纳米填料的优点，具有一系列优良的性能，应用前景广阔。     

PVAm/PAN复合膜的制备及其对CO2/CH4的分离性能

New polymeric membrane materials——polyvinyl amine (PVAm) with different primary amine contents were synthesized.By covering polyacrylonitrile(PAN) ultrafiltration membranes with PVAm, the PVAm/PAN composite membranes for CO₂/CH₄ separation were prepared. The composite membranes containing more primary amino groups have higher selectivity for CO₂/CH₄.The cross-linking of acid or glutaradehyde could improve the gas permselectivity of the composite membranes. With decreasing CO₂ content in the feed gas, the CO₂/CH₄ separation factor increased.When the feed gas was 25%(vol) CO₂ and 75%(vol) CH₄, the CO₂ permeation rate was 4.1×10^-9cm³(STP) &#8226;cm^-2&#8226;Pa^-1&#8226;s^-1, and the CO₂/CH₄ separation factor was 180.     

以乙烯基端基氨基甲酰基甲基蜜胺为基础的新型粘合增进剂

为硫化橡胶与镀黄铜钢丝帘线的键合和粘合,开发了一种新型无间苯二酚、尚处试验阶段的粘合增进剂RAP-393。这种材料属于能通过包括乙烯基聚合、巯基加成和普通的缩合等多种机理交联的乙烯基端基氨基甲酰基甲基蜜胺树脂。RAP-393树脂不需间苯二酚,可和六甲氧基甲基蜜胺(HMMM、CYREZ693粘合增进剂)一起使用。使用基本胶料获得的振荡圆盘流变仪、应力-应变和21d粘合结果与目前市售的HMMM/间苯二酚粘合增进剂体系相同。     

尿基复混肥的生产应用

论述了我国发展高浓度复合型肥料的必要性，介绍了以尿素为氮源生产复合肥的特点，以团粒法、料浆法、熔体法和掺混法为代表，介绍了尿基复混肥的生产方法和工艺技术特征。     

环氧乙烯基酯树脂 (Ⅱ)环氧乙烯基酯树脂在酸、碱、盐溶液中的稳定性

较为详细论述了影响环氧乙烯基酯树脂在酸、碱、盐溶液中稳定性的各种结构因素。     

有机锡化合物的用途

有机锡化合物在工业、农业、医药和材料等方面有其极为广泛的用途，本文概述了有机锡化合物作为塑料热稳定剂、生物杀伤药剂和均相催化剂的应用。     

Simultaneous Synthesis of Dimethyl Carbonate and Poly（ethylene terephthalate） Using Alkali Metals as Catalysts

Dimethyl carbonate （DMC） and poly（ethylene terephthalate） was simultaneously synthesized by the transesterification of ethylene carbonate （EC） with dimethyl terephthalate （DMT） in this paper. This reaction is an excellent green chemical process without poisonous substance. Various alkali metals were used as the catalysts. The results showed alkali metals had catalytic activity in a certain extent. The effect of reaction condition was also studied. When the reaction was carded out under the following conditions： the reaction temperature 250℃, molar ratio of EC to DMT 3 ： 1, reaction time 3h, and catalyst amount 0.004 （molar ratio to DMT）, the yield of DMC was 68.9%.