离子着色铁系瓷釉中铁的穆斯堡尔谱研究

应用穆斯堡尔谱及色度测量等方法研究了随总铁含量和还原程度的改变,ＳｉＯ２－Ａｌ２Ｏ３－Ｎａ２Ｏ离子着色铁系瓷釉中铁的结构行为及其对应的呈色关系。结果表明：Ｆｅ＾２＋离子以四、六两种配位状态同时存在于瓷釉中,随着总铁含量改变,Ｆｅ＾２＋／（Ｆｅｔ＾２＋Ｆｅ＾３＋）、Ｆｅ＾２＋（Ｆｅ＾２＋／Ｆｅ０＾２＋）的值各自保持不变,分别约为０．７４和０．４５。此时,瓷釉呈色不同,但Ｆｅ＾２＋离子中均以４５％的固     

用掺杂方法提高α—FeOOH表观密度

在用碱法制备α－ＦｅＯＯＨ，进而合成γ－Ｆｅ２Ｏ３磁粉的过程中，经常加入Ｚｎ＾２＋离子以改善磁粉粒的针形，但因Ｚｎ＾２＋离子的电荷少于Ｆｅ＾３＋离子，因而能使α－ＦｅＯＯＨ晶体产生缺陷，最终影响磁粉的性能，本文通过在制备α－ＦｅＯＯＨ过程中掺入杂质Ｍｎ＾２＋的方法，探讨消除α－ＦｅＯＯＨ晶体缺陷，提高其表观密度，改善磁粉性能。     

PMMA接枝氰乙基化交联甘薯淀粉改性产物的合成及其对水中微量重金…

以ＫＰＳ－Ｕ为引发体系，制得甲基丙烯酸甲酯（ＭＭＡ）接枝氰乙基化交联甘薯淀粉，用ＩＲ及ＳＥＭ对产物作了表征。含－ＣＯＮＨＯＨ基的改性接枝物对Ｐｂ＾２＋、Ｆｅ＾３＋、Ｃｄ＾２＋、Ｃｕ＾２＋等重金属离子有较佳的吸附性能。     

烧成工艺对钧瓷釉呈色的影响

利用河南省神地区的原料研究了烧成温度制度对钧瓷釉呈色的影响,通过对釉色的观察和利用国产ＪＦＹ－ＰＳ测配色仪进行颜色分析,结果表明,在适当的烧成工艺条件下,可以在相当宽的组成范围内获得呈色良好的钧红瓷釉;还原温度的高低是影响钧瓷釉呈色的重要影响因素,较低的还原温度减弱了Ｃｕ２Ｏ胶粒和Ｆｅ＾３＋显色,使釉的长波反射率降低,相对强化了Ｆｅ＾２＋的显色使用,可以获得不同深浅的葡萄紫浅釉;偏高的还原温度将显     

H2O2—H2SO4粗化蚀刻液中H2O2浓度的快速测定

根据Ｈ２Ｏ２－Ｈ２ＳＯ４粗化蚀刻液中的Ｈ２Ｏ２与过量Ｆｅ＾２＋离子的定量氧化还原反应，用伏安法测定剩余Ｆｅ＾２＋离子在铂电极上极氧化峰电流，求算Ｈ２Ｏ２的浓度。方法简单，快速，适用于印制电路板生产现场监控。     

氧化还原体系引发淀粉—丙烯酸接枝共聚的研究

研究了空气存在下，Ｈ２Ｏ２－Ｆｅ＾２＋、Ｋ２Ｓ２Ｏ８－Ｆｅ＾２＋、ＫＰＳ－ＮａＨＳＯ３、ＫＰＳ－ＣＨ３ＯＨ等氧化还原体系引发淀粉－丙烯酸的接枝共聚反应，探索了ＫＰＳ－ＮａＨＳＯ３引发聚合时的最佳操作方法。     

高效液膜分离富集水和工业废水中微量氟

用Ｎ５０３、ＳＰＡＮ８０和煤油等太液膜体系分离集Ｆ，在适宜条件下能迅速、定量迁移富集Ｆ。许多常见离子在此条件下，则不能通过液膜迁移内相中，从含有Ｆｅ＾３＋、Ｃｕ＾２＋、Ｃｏ＾２＋、Ｎｉ＾２＋、Ｚｎ＾２＋、Ｃｄ＾２＋、Ｃｒ＾３＋和Ｍｎ＾３＋等离子混合溶液２中分离富集Ｆ，氟的回收率为９９．５－１００．４％，ＲＳＤ在３．８％以下。     

色淀化剂对色酚类偶氮色淀颜料性能的影响

本文研究了以２Ｂ酸（４－氯－２－氨基－５－甲基－苯磺酸）为重氮组份，色酚ＡＳ－ＯＬ（Ｎ－邻甲氧基苯基－３－羟基－２－萘甲酰胺）为偶合组分，采用Ｃａ＾２＋，Ｓｒ＾２＋，Ｂａ＾２＋，Ｍｇ＾２＋，Ｍｎ＾２＋，Ｚｎ＾２＋等金属盐为色淀化剂制备色淀颜料，观察不同色淀化剂对色淀颜料的色光，晶型及耐热稳定性的影响，结果表明，采用不同金属盐为色淀化剂，对色淀颜料的色光，色力及耐热稳定性有明显影响。     

钛在硫酸钛溶液中的耐蚀性研究

本文对钛在硫酸法钛白粉生产的钛液中的耐蚀性进行了研究，主要讨论了Ｆｅ＾３＋、Ｔｉ＾４＋离子对ＴＡ２在钛液中的缓蚀效率及耐蚀机理，结果表明Ｆｅ＾２＋、Ｆｅ＾３＋、Ｔｉ＾４＋对ＴＡ２在钛液体系中具有良好的缓蚀作用。     

Fe^3＋,Al^3＋,Mg^2＋对石膏结晶习性影响的研究

本文在ＭＳＭＰＲ结晶器中研究了无Ｆ存在下，Ｆｅ＾３＋、Ａｌ＾３＋、Ｍｇ＾２＋三咱离子共存时对石膏结晶习性的影响，结果发现，无论硫酸根过量２．４％还是过量４．８％，Ｆｅ＾３＋、Ａｌ＾３＋、Ｍｇ＾２＋共存得到的石膏晶体几乎都是针状晶体；当硫酸另两种相应的离子浓度保持一定水平时，增大Ｆｅ＾３＋含量，石膏晶体变长；增长Ｍｇ＾２＋含量，石膏晶体变小；增长Ａｌ＾３＋含量，石膏晶体长大，Ｆ与Ａｌ＾３＋同时存在     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。