膨胀型丙烯酸乳液防火涂料

以丙烯酸乳液为主要成膜物质，以季戊四醇、聚磷酸铵和三聚氰胺为防火添加剂，研制了磷系膨胀型丙烯酸乳液防火涂料。该防火涂料兼具一般乳液涂料的装饰性和防火性。     

环氧改性丙烯酸乳胶防锈涂料

以环氧E—51与St、BA、MAA、N—MA等单体经乳液聚合方法制成环氧改性丙烯酸乳液，用于防锈涂料。讨论了环氧树脂对乳液的成膜性能、各种稳定性及涂料耐腐蚀等性能的影响。     

TL-1型建筑内墙涂料的研制与开发

以TL-1型建筑乳液为主要成膜物，通过加入填料、溶剂及各种助剂成功地研制出建筑内墙涂料。经检验各种性能良好，符合环保要求，产品质量优良，并讨论了乳液、增稠剂、成膜助剂等对涂料性能的影响。     

有机硅-苯丙乳液最低成膜温度的研究

采用半连续法制备了稳定的有机硅-苯丙乳液，研究了软硬单体配比和有机硅单体含量对共聚物玻璃化转变温度(Tg)和乳液最低成膜温度(MFT)的影响：并选用3种成膜助剂(TXL、DPD和二乙二醇二乙醚)分别考察了成膜助剂的种类和用量对乳液产品MFT的影响。结果表明，共聚物T和乳液的MFT呈较好的线性关系，该乳液体系MFT/Tg约为0．97；乳液产品的MFT随成膜助剂用量的增加而大幅降低，其中二乙二醇二乙醚的效果最好。     

醇酸涂料—从容易的有机溶剂到困难的水性

涂料的生产者及使用者都能熟悉溶解于有机溶剂的成模物质。在从这些常规体系向水性醇酸乳液及/或物理干燥的丙烯酸分散体转变时,涉及到涂料配制施工,搭接时间及成膜的某些困难便油然而生。 涂料的性能主要决定于成膜。从这一方面来说,基于分散体成膜物质的涂料比溶剂型的涂料更关键。这是因为成膜物质粒子的聚结在分散体中是决定性能的关键步骤。成膜及因此而产生的保护性能主要是由构成成膜物质粒子树脂的粘度及其混合性所控制。通过对丙烯酸及醇酸树脂对这二种参数的比较,可解释丙烯酸分散体及醇酸乳液成膜之间的差别。 已显示出在成膜中,醇酸能完全展布,因为它能从油/水乳液转变成水/油乳液。相反,甚至     

真石漆专用苯丙乳液—浅析乳液薄膜的吸水泛白现象

本文从分析乳液薄膜吸水机理和成膜助剂对乳液成膜过程的作用入手，论离真石漆专用苯丙乳液对克服乳液薄膜吸水泛白现象所采取的措施及其特点。     

氧化还原引发核/壳乳液的制备及其在水性涂料中的应用

采用过硫酸盐－亚铁盐氧化还原引发体系合成具有核／壳结构的苯乙烯－丙烯酸酯乳液，通过对比不同引发体系乳液粒径粒径分布，玻璃化转变温度，乳液成膜性能等指标，表明氧化还原引发的核／壳结构的苯丙乳液性能比热引发无规共聚苯丙乳液大大提高，用此乳液配制的涂料性能也有很大提高。通过选择增稠剂及添加助剂，解决了涂料调色过程中浮色及分层现象。     

稳定型水性带锈涂料的研制

稳定型水性带锈涂料是由自交联苯丙乳液为成膜物，三聚磷酸二氢铝为主体防锈颜料，拼用磷酸锌、锌黄、氧化锌和铁红组成防锈颜料体系，并加入复合缓蚀剂组成的。介绍了苯丙乳液成膜物及其涂料的制法，并列举了该涂料的性能指标。讨论了影响涂料性能的诸因素。     

转化型水性带锈涂料

转化型水性带锈涂料是由自制的呈酸性苯丙乳液为成膜物质,以转化剂将锈层转化螯合物的水性带锈涂料,可直接在带锈的钢件表面上涂装,介绍了苯丙乳液的组成和合成工艺及该乳液的性能,讨论了影响乳液性能的主要因素,以及该乳液制成的涂料性能。     

国家标准《建筑涂料用乳液》制定简介

涂料用各类聚合物乳液是建筑用乳胶漆的主要成膜物质，是影响乳胶漆性能的首要因素。目前随着乳胶漆需求量的不断增长，我国各类乳液的生产规模、品种及质量都得到了快速发展。目前我国聚合物乳液生产企业约有几十家，不同的乳液品种约20多种，制定一个统一的乳液产     

物理改性对PP成型收缩性的影响

研究了物理改性对聚丙烯(PP)成型收缩率的影响效果及其作用机理。研究表明,填充、共混、增强改性均可降低PP的成型收缩率。填充改性通过改变PP的结构状态影响PP的成型收缩率,且片状的滑石粉有较好的效果;共混改性通过使共混组分的分子链相互缠绕,改变PP的结晶从而控制PP的成型收缩率,与高密度聚乙烯相比,线性低密度聚乙烯对PP成型收缩率的影响较显著;玻璃纤维(GF)增强改性PP除了起到破坏PP的结晶度,从而影响成型收缩率外,更重要的是GF的加入限制了PP的结晶收缩。     

EFFECT OF PRETREATMENT ON KINETICS OF CONVECTION DRYING OF ONION

Onion of two varieties, i.e. Oporto and Blonska was dried by convection at 60°C and 2 m/s. Prior to drying sliced onion was subjected to following treatments: soaking in water, dipping in starch solution, dipping in starch solution supplemented either with ascorbic acid or CaCl₂, and dewatering by osmosis in sucrose solution. Drying of raw onion was taken as a reference.

It has been found that both variety and pretreatment affect the course and rate of drying. Soaking in water and dipping in starch solution either increase rate of drying or have no effect on the kinetics of the process. Supplementing the starch solution with ascorbic acid or CaCl₂ adversely affects the rate of drying. Unfavorable effect on the rate of drying has also osmotic dewatering preceding convective drying.     

COMPARISON OF METHODS OF ANALYSIS OF GYPSUM1

The different analytical methods proposed for the evaluation of gypsum have been subjected to an experimental test. A combination method, consisting of a fusion with KHCO₃ and determination of CaO by KMnO₄ titration, the SO₃ by Andrews method of titration of BaCrO₄ has been found to give very reliable results with the least consumption of time.     

铝合金无铬电化学抛光研究

采用紫外光谱和电化学测试方法,研究铝合金无铬电化学抛光添加剂、配方、工艺,其抛光效果优于铬酸电化学抛光,是一项有应用前景的新工艺。     

EFFECT OF PRETREATMENT ON KINETICS OF CONVECTION DRYING OF ONION

ABSTRACT

Onion of two varieties, i.e. Oporto and Blonska was dried by convection at 60°C and 2 m/s. Prior to drying sliced onion was subjected to following treatments: soaking in water, dipping in starch solution, dipping in starch solution supplemented either with ascorbic acid or CaCl₂, and dewatering by osmosis in sucrose solution. Drying of raw onion was taken as a reference.

It has been found that both variety and pretreatment affect the course and rate of drying. Soaking in water and dipping in starch solution either increase rate of drying or have no effect on the kinetics of the process. Supplementing the starch solution with ascorbic acid or CaCl₂ adversely affects the rate of drying. Unfavorable effect on the rate of drying has also osmotic dewatering preceding convective drying.     

涂层防腐蚀的电化学研究

综述了国内外现行的涂层防腐蚀性能研究的电化学方法,说明了电化学方法评价涂层性能的一般规律和特点,指出电化学方法评价涂层性能具有快速、准确、方便的优点。     

酚醛树脂热降解动力学研究

用热失重非等温法对不同甲醛,苯酚魔鬼洋比的酚树脂进行了热降解动力学研究。结果表明,甲醛,苯酚摩尔比为１．５时,酚醛树旨的热发活化能最高。耐热性最好。     

螺旋桨桨叶加工计算机辅助工艺生成系统

根据螺旋桨桨叶加工工艺过程的要求 ,编制了计算机辅助工艺生成程序 ,实现了工艺参数的计算机自动生成 ,用优化方法求取了桨叶加工过程的最小打磨量 ,并根据工艺要求生成各种形式的报表 ,从而大大提高了加工过程的效率     

THE EFFECT OF SIZE OF GRAIN UPON THE PROPERTIES OF SILICA CEMENT1

A thorough study has been made of the effect of size of grain upon the softening point and linear change of silica cements prepared in the laboratory. The ratio of grain sizes in a cement of constant chemical composition has a distinct effect upon the softening point. The linear change after heating to 110°C and 1300°C was not appreciably affected by variation in grain size. From data obtained by testing a large number of commercial cements it is concluded that, owing to variations in clay content, screen analyses are not definitely related to rate of settle or to softening point. A method for determining “rate of settle” is described.     

EFFECT OF MAGNETIZATION OF WATER ON INDUCTION TIME AND GROWTH PERIOD OF NATURAL GAS HYDRATE

The effect of diluted solution's magnetization on induction time and growth period of natural gas hydrate (NGH) has been investigated in quiescent reaction system at pressure of 4.5 MPa and temperature of 274 K with SDS as surfactant, by using volume fixed and pressure falling method. Experimental results show that magnetization will have effect on the induction time of NGH. After magnetization with magnetic field intensity of 0.33 T, the induction time of NGH has been reduced to 47 min (average) from 99 min (average) in which there is no magnetization. On the other hand, the induction time has been prolonged after magnetization of the diluted solution with magnetic field intensity of 0.05 T, 0.11 T, 0.22 T, 0.44 T. Especially with magnetic field intensity of 0.11 T, the induction time had even been prolonged to 431 min (average). The effect of magnetization on the growth period of NGH has not been found at the experimental condition.