塑料异型材可焊性检测有关问题

在GB／T8814—2004国家标准《门、窗未增塑聚氯乙烯（PVC—U）型材》中，新增加了主型材可焊性检验指标，以取代JG／T3017-94强硬聚氯乙烯塑料门》与JG／T3018—94《硬聚氯乙烯塑料窗》标准中的角强度指标。     

为行业发展而奔走为企业服务而停留——访广东省塑料工业协会符岸理事长

广东省塑料工业经过近二十年的高速发展，目前已成为广东省轻工行业的支柱产业之一。在我国的塑料加工行业中，广东省塑料产业占有相当重要的位置，是目前最大的塑料加工省份，产量、技术、行业效益等各项指标多年来居全国首位，整体行业水平领先于全国。广东省塑料工业协会作为政府部门与会员单位联系的桥梁和纽带，为行业、会员服务，维护会员合法权益，引导并促进塑料行业的发展做了大量的工作。     

塑料着色剂基本要求和测试方法-耐热性

塑料用着色剂的耐热稳定性是指在一定加工温度下和一定时间内，不发生明显的色光，着色力和性能的变化。塑料着色与油墨和涂料着色最大的区别在于绝大多数塑料着色成型过程中都有一个加热的过程，着色剂在塑料成型中常常受热会发生变色，严重影响产品质量和其它性能。所以耐热性在塑料着色上是一个非常重要的指标。     

我国塑料管道的技术水平和质量问题

本文概述了我国塑料管材的发展，主要塑料管材品种的技术质量水平，并介绍了部分管材检测指标，并提出了一些提高我国塑料管材质量水平的建议。     

废聚丙烯塑料和低温煤焦油共裂解制油的研究

本文对低温煤焦油和废聚丙烯塑料共裂解油化工艺条件进行了研究。通过优化实验，得到了废聚丙烯塑料与低温煤焦油共裂解制油的最佳操作条件，并对试验结果进行了分析。结果表明，在最佳工艺条件下，低温煤焦油加入量不能超过15％，共熔物制油转化率可达86％。同时加入总量40％的废聚乙烯塑料不影响油品转化率，只影响柴油和汽油的相对收率。制成的柴油同0＃标准柴油指标一致，汽油同90＃标准汽油指标基本相同。     

塑料用吸湿性消泡多功能母粒的开发与应用

开发塑料吸湿性消泡专用多功能母料，它能在高温挤出过程中吸收塑料熔体中残留的水份或其它挥发份，从而消除气泡，稳定膜泡尺寸，使吹膜工艺顺利进行。从厚度指标、力学性能和光学性能等方面与原烘干工艺生产的薄膜进行了对比。结果表明：使用新研制开发的改性母料的产品各项使用性能指标均相当或等于传统烘干工艺吹制的薄膜产品，批量生产和使用证明了该产品的品质指标和使用性能的稳定。     

搞好行业结构调整，加快广东省塑料工业发展

广东省塑料工业经过近二十年的高速发展，目前已成为广东省轻工行业的支柱产业之一。在我国的塑料加工行业中，广东省塑料产业占有相当重要的位置，是目前最大的塑料加工省份，产量、技术、行业效益等各项指标多年来居全国首位，整体行业水平领先于全国。同时，我省塑料行业在高速发展过程中，不但打下了良好的产业基础，而且行业整体基本走过了原始发展阶段，储蓄有强劲的继续发展潜力。     

PA／ABS塑料合金的研制

叙述了PA/ABS塑料合金的制造方法。PA/ABS塑料合金的商品化只是近几年在国外才见有报道。PA与ABS之间相容性较差,因此在制造时必须加入相容剂。此外,还需加入弹性体,以改善PA/ABS塑料合金的冲击韧性。本文列出的PA/ABS塑料合金的指标已接近或达到了日本孟山都化成公司的同类产品的指标。文中还分析了PA/ABS合金的微观相态结构的特征。     

世界塑料工业回顾与前瞻

世界银行于九八年四月公布的资料表明，塑料消费量与平均收入水平成正比，因为原材料的消耗是工业活动和相关财富的一个指标。资料显示，平均GNP达到15,000美元或以上的国家，人均消耗塑料超过60千克，而平均GNP为2,500美元或者以下的国家，人均消费塑料则少于15千克。     

塑料导线传输特性研究

概述了金属导线与塑料导线的区别,对塑料导线的导电机理进行了研究。通过对塑料导线交流、直流、电阻指标的测试,发现塑料导线能够达到与金属导线相同的导电性能,并具有金属导线所不具备的独特性能。认为塑料导线必将对电力与电信传输带来重大影响,并得到广泛应用。     

不同天然色素对PBS性能的影响

将从石榴皮、大黄和黄芩中提取的3种色素以不同的质量比与可生物降解的聚丁二酸丁二醇酯(PBS)共混,制备了多种比例的PBS/色素复合材料,研究了上述3种PBS/色素材料的结晶性和热稳定性;同时研究了色素的添加对PBS力学性能和抗菌性的影响。结果表明,添加3种色素对PBS的结晶形态影响不大,但是使晶粒尺寸变小,结晶度增加;使PBS的热稳定性有所提高,但对综合力学性能影响不大;3种色素都使PBS材料具有良好的抗菌性。     

Study of the anticorrosive efficiency of zincite and periclase-based core–shell pigments in organic coatings

The objective of this work was to identify the anticorrosive efficiency of synthesized, MeO/core pigments and of MeO pigments (MeO = ZnO, MgO) with varied morphology of particles. The synthesized MeO-type pigments displayed varied particle morphologies and the MeO/core core–shell pigments exhibited surface of particles made of zincite and periclase. These core–shell pigments have the properties of both the ZnO layer and of the core (wollastonite or graphite). Epoxy-ester based coatings containing the synthesized pigments were also formulated. To test the anticorrosion properties of the coatings, accelerated corrosion tests were carried out in the environment of condensed water, of NaCl mist, and of condensing water and SO₂. The synthesized core–shell pigments have good anticorrosion efficiency in an epoxy-ester coating.     

A method for preparation and application of micronized ferrite pigments in anticorrosive solvent-based paints

This work presents a method of preparing single-, double-, and triple-cation ferrite pigments by employing simple chemical techniques to study their corrosion protection properties. The prepared pigments were characterized using X-ray diffraction and scanning electron microscopy. All prepared ferrite pigments were evaluated using ASTM methods. Anticorrosive paint formulations were performed using different prepared pigment loadings. The physico-mechanical and corrosion properties of dry paint films were examined. The tests revealed that the prepared ferrite pigments show excellent anticorrosive behavior, and that the best among them in performance are zinc and zinc magnesium. Calcium, zinc–calcium, and zinc–magnesium–calcium ferrites show better performance in high pigment loadings, while magnesium ferrite pigments show good results only in low pigment loading.     

不同红颜料对原液着色PA6纤维母粒性能的影响

选用苝系、偶氮、吡咯三种类型红颜料分别与聚酰胺6(PA6)进行熔融共混挤出制备PA6红母粒。通过粒径分析仪、光学显微镜、毛细管流变仪分别研究三种颜料的粒径分布、颜料在PA6树脂中的分散性能以及母粒流变性能。结果表明,加入苝系和偶氮颜料制备的母粒熔体黏度更接近纯PA6,苝系颜料粒径较小且在PA6树脂中的分散性较好。在此基础上,研究了不同含量的苝系颜料在PA6树脂中的着色、结晶等性能以及对PA6色丝可纺性和力学性能的影响。结果表明,苝系颜料质量分数为0.4%时,所制PA6色板的着色力相对较高;着色纤维表面光滑,可纺性好;断裂强度基本不变,断裂伸长率略有增加。     

TiO2@CoTiO3 complex green pigments with low cobalt content and tunable color properties

Green complex pigments with TiO₂@CoTiO₃ core–shell structure were prepared through calcination of precursors obtained from the precipitation of Co²⁺ on TiO₂ particles. The synthesized pigments were characterized by colorimetry, near-infrared diffuse reflectance spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and ultraviolet–visible (UV–vis) spectroscopy. The pigments were found to consist of a rutile TiO₂ core and outer ilmenite CoTiO₃ shell. The green pigments with good color properties could be obtained via calcination of the precursors at 800 °C. The pigments with Co/Ti ratio of 0.4 had the highest green component value and exhibited good color properties (L*=49.51, a*=−34.58, b*=5.53). The color properties could be tuned by just changing the Co/Ti ratio. The as-prepared complex pigments exhibited an enhanced near-infrared reflectance compared with pure CoTiO₃ pigments and also exhibited better color properties than the mixed pigments of TiO₂ and CoTiO₃. Further, the complex pigments had much lower consumption of cobalt compared to pure CoTiO₃ and Co₂TiO₄ pigments. The special core–shell structure was found to be responsible for the enhanced near-infrared reflectance and good color properties.     

Synthesis and characterization of local clay–titanium dioxide core–shell extender pigments

A simple chemical technique has been used to prepare core–shell extender pigments based on Nigerian indigenous clays as core and titanium dioxide as shell. The prepared core–shell extender pigments were characterized using X-ray fluorescence and scanning electron microscopy. The physico-chemical properties of these extender pigments were also evaluated according to ASTM measurements. The study showed that the prepared core–shell pigments were nontoxic and environmentally friendly. They are of low cost and can be incorporated in semi-gloss paints, paper, rubber, and plastic composites without much effect on the volume. The characteristics of these pigments showed that they combine the properties of both their precursors, and have the potential to overcome their disadvantages, e.g., low hiding power of clays and photochemical activity of titanium dioxide.     

Performance of phosphate–alumina pigments in waterborne paints for protection of cold-rolled steel

Core–shell theory presents a new easy method to obtain high performance, economic, and eco-friendly anticorrosive mixed pigments. The core–shell pigments in this work are prepared by depositing a surface layer of an expensive efficient anticorrosive pigment (phosphates) on a bulk of less expensive extender pigment (alumina). The combination of these two compounds led to the production of new pigments with improved properties different from each of its individual components; and consequently these improved properties led to changing the efficiency of protection properties of paint films containing these new pigments. The new pigments were characterized using XRD, SEM, TEM, and EDAX analysis to elucidate their structure and prove the presence of phosphate ions on the surface of alumina. These pigments were also evaluated according to ASTM measurements. Then they were incorporated in three groups of emulsion paint formulations based on styrene acrylic emulsion copolymer, and comprising different concentrations of Zn, Mg, and 1Zn·1Mg phosphates/alumina core–shell pigments; in addition to a control formulation free of these pigments, to evaluate their efficiencies in anticorrosive paints for protection of cold-rolled steel. Chemical, physical, and mechanical measurements were carried out, besides corrosion resistance tests and weight loss of steel panels under paint films which were determined in 5% NaCl solution for 28 days. The results proved that the prepared formulations containing the prepared pigments could protect steel efficiently from corrosion compared to the control specimen. Groups II and III containing higher weight percentages of prepared pigments showed the best performance in corrosion protection, and the best performance among these two groups was paint films containing magnesium phosphate/alumina pigments.     

改性钴蓝颜料及其研究进展

简述了尖晶石型钴蓝颜料的结构及其固相、液相、气相不同制备方法,通过XRD、SEM等测试手段从微观上总结了近年来不同价态离子掺杂对所制备出的钴蓝颜料结构和性能的影响,其中二价阳离子对颜料的晶格常数有明显影响,且晶格常数的变化符合Vegard定律;三价阳离子对颜料的色调有显著的改善。最后对从制备方法和掺杂离子方面对钴颜料的发展进行了展望。     

Recent Developments in Organic Pigments

Azo, vat and phthalocyanine pigments are discussed briefly. The demand for high-grade pigments has led to the development of new classes of organic pigments, viz. quinacridone, dioxazine, perylene—perinone, fluorubine, pyrrocoline, and isoindolinone pigments. The preparation and properties of these pigments are discussed, particular attention being paid to the range of colours and the fastness properties obtained and to the prospects of commercial development.     

粉末涂料用有机颜料概述

粉末涂料用有机颜料属于高性能有机颜料,是作为无机颜料的一种补充,补齐了无机颜料在颜色鲜艳度、色相齐全方面的缺陷。有机颜料的许多应用性能不仅决定于化学结构,粒径大小与分布、颗粒表面极性、晶体类型与结晶度、表面改性对有机颜料也有很大的影响。本文从有机颜料物理形态、晶型、化学结构特性等方面阐述有机颜料的性能,同时介绍了粉末涂料对有机颜料的性能要求和一些粉末涂料中常用的有机颜料,以及这些颜料的特性。总结了有机颜料在粉末涂料中使用容易出现的问题,了解其产生的原因和机理,帮助从业者在众多的颜料色号中选择合适的高性能有机颜料。