脉冲电镀Ni－Co合金的研究

研究了脉冲参数对电沉积Ｎｉ－Ｃｏ合金镀层的钴含量与硬度的影响。确定了最佳的脉冲参数。应用Ｘ射线和扫描电镜分析了Ｎｉ－ＣＯ合金镀层的结构和形貌。比较了脉冲电流（ＰＣ）和直流电流（ＤＣ）电镀Ｎｉ－Ｃｏ合金镀层的各种性能。     

电沉积锌—镍—钴三元合金的研究

通过对镀液组成及电镀参数的研究，确定了电沉积Ｚｎ－Ｎｉ－Ｃｏ三元合金的工艺条件，获得的三元合金镀层其耐蚀性明显优于Ｚｎ－Ｎｉ合金镀层，且随钴含量增加耐蚀性增强。     

电沉积锌－镍－钴三元合金的研究

通过对镀液组成及电镀参数的研究，确定了电沉积Ｚｎ－Ｎｉ－Ｃｏ三元合金的工艺条件，获得的三元合金镀层其耐蚀性明显优于Ｚｎ－Ｎｉ合金镀层，且随钴含量增加耐蚀性增强。     

锡钴合金电镀应用

锡钴合金电镀应用郑开发（福州大统钟表有限公司，３５００１４）我公司使用台湾产品Ｓｃ－２１０Ａ安定剂，Ｓｃ－２１０Ｂ光泽剂，下面介绍此种镀液的调整及维护。本工艺主要含Ｋ４Ｐ２Ｏ７、ＣｏＳＯ４、Ｓｎ２Ｐ２Ｏ７、安定剂Ｓｃ－２１０Ａ和光泽剂Ｓｃ－２１０Ｂ，...     

5－Br－TAR的合成及其在反相HPLC分离测定Co（Ⅱ）、Cr（Ⅵ）、Rh（Ⅲ）中的应用

以合成的新试剂５－Ｂｒ－ＴＡＲ为往前衍生试剂，首次用阴离子表面活性剂Ｓ，Ｄ．Ｓ．为对离子试剂。以含１×１０（－２）ｍｏｌ·Ｌ（－１）的ｐＨ５．８的乙酸－乙酸钠缓冲溶液和３．５×１０（－４）ｍｏｌ·Ｌ（－１）的Ｓ．Ｄ．Ｓ．的甲醇－水（６８：３２，Ｖ／Ｖ）为流动相，在Ｃ（１８）柱上，１５ｍｉｎ内分离测定了Ｃｏ（Ⅱ）、Ｒｈ（Ⅲ）、Ｃｒ（Ⅵ）的５－Ｂｒ－ＴＡＲ配合物。当ＳＮＲ＝２时，检出限分别为０．４９、０．３２、０．４４ｐｐｂ。用于废水及电镀液中Ｃｏ（Ⅱ）、Ｃｒ（Ⅵ）的测定，效果较好。     

酸性氯化物Zn-Co合金电镀

研究了微酸性氯化物体中电镀Ｚｎ－Ｃｏ合金的工艺,探讨了镀液组成及工艺条件对镀层中钴含量的影响,得到了Ｚｎ－Ｃｏ合金电镀的最佳工艺。并对Ｚｎ－Ｃｏ合金镀层耐蚀性进行了考察,结果表明Ｚｎ－Ｃｏ合金镀层的耐蚀性是镀锌层的２－４倍。     

尿素熔体中Cu—Ti合金电沉积研究

采用循环伏安曲线、恒电位电解断电后的电位－时间曲线以及ＥＤＡＸ等方法，研究了Ｃｕ（Ⅱ）、Ｔｉ（Ⅳ）在尿素－金属溴化物熔体中还原的电极过程，探讨了Ｃｕ－Ｔｉ合金电沉积的条件和机一。结果表明，在尿素－金属溴化物熔体中，Ｃｕ（Ⅱ）一步不可逆还原为Ｃｕ，Ｔｉ（Ⅳ）被还原，并与Ｃｕ（Ⅱ）共沉积为Ｃｕ－Ｔｉ合金，所得Ｃｕ－Ｔｉ合金中含钛量可达４９ａｔ％。     

锡钴镀液中钴的光度法测定

用硫氰酸盐作显色剂用光度法测定焦磷酸盐电镀锡钴溶液中的钴含量，方法简便易行，分析结果的准确度和精密度能满足生产要求。１　试剂和仪器钴标准溶液：称取４．７６９９ｇ硫酸钴（ＣｏＳＯ４·７Ｈ２Ｏ）溶于水中，加入硫酸（１＋１）溶液４ｍｌ，移入１０００ｍｌ容量瓶，加水定容，混匀。此贮备液含钴１ｍｇｍｌ。用时取５ｍｌ此贮备液于５０ｍｌ容量瓶中，加水定容，混匀，此标准工作溶液含钴０．１ｍｇｍｌ。硫氰酸铵：５０％水溶液。７２１型分光光度计：１ｃｍ光程比色皿。２　分析方法２．１　待测液的制备取镀液于适宜的容量…     

尿素熔体中Cu－Ti合金电沉积研究

采用循环伏安曲线、恒电位电解断电后的电位－时间曲线以及ＥＤＡＸ等方法，研究了Ｃｕ（Ⅱ）、Ｔｉ（Ⅳ）在尿素－金属溴化物熔体中还原的电极过程，探讨了Ｃｕ—Ｔｉ合金电沉积的条件和机理。结果表明，在尿素－金属溴化物熔体中，Ｃｕ（Ⅱ）一步不可逆还原为Ｃｕ，Ｔｉ（Ⅳ）被还原，并与Ｃｕ（Ⅱ）共沉积为Ｃｕ—Ｔｉ合金，所得Ｃｕ—Ｔｉ合金中含钛量可达４９ａｔ％。     

合成Co2O3—Cr2O3—F32O3—MnO2系高温黑颜料最佳工艺条件的探讨

本文介绍了Ｃｏ２Ｏ３－Ｃｒ２Ｏ３－Ｆｅ２Ｏ３－ＭｎＯ２系高温黑颜料的合成工艺，研究分析了四种氧化物的不同配比、混合及合成温度等工艺过程对颜料呈色的影响，从而确定了含钴量较低呈色纯正的Ｃｏ－Ｃｒ－Ｆｅ－Ｍｎ系高温颜料的最佳工艺条件，并利用过渡金属络合物吸收光谱理论对Ｃｏ、Ｃｒ、Ｆｅ、Ｍｎ四种元素的变价离子使含Ｂdisplay status     

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。