电磁线用绝缘静电粉末涂料

介绍了电磁线用绝缘材料的基本情况,探讨了国内电磁线用绝缘静电粉末涂料的品种、优缺点,研究开发现状,以及发展趋势。     

阳极氧化法形成绝缘氧化铝膜工艺研究

在１５％硫酸介质中，选择了有机羧酸及其盐、无机盐、表面活性剂和电源波形的最佳条件，获得了耐击穿电压高，耐蚀，韧性好的绝缘氧化铝膜，该铝箔可用于电磁线圈的绕制，获得了满意的结果。     

陶瓷涂层热喷涂制备工艺

热喷涂陶瓷涂层将陶瓷材料耐高温、耐磨、耐腐蚀及隔热、绝缘等性能与金属材料的特点有机地结合起来。本文介绍了陶瓷涂层的热喷涂方法及工艺。     

GE举办硅橡胶在高压绝缘工业中的应用研讨会

有机硅橡胶将逐步取代传统的陶瓷、玻璃，成为中高压绝缘工业的重要材料。在日前由GE高新材料集团在京举办的“硅橡胶在高压绝缘工业中的应用研讨会”上，GE的专家们指出了这一重要趋势，并向与会人士展示了有机硅橡胶作为高压绝缘材料应用的诸多优势和机理。     

有机硅橡胶将成高压绝缘工业重要材料

有机硅橡胶将逐步取代传统的陶瓷、玻璃，成为高压绝缘工业的重要材料。在口前由GE高新材料集团在北京举办的“硅橡胶在高压绝缘工业中的应用研讨会”上，GE的专家们指出了这一重要趋势，并向与会人士展示了有机硅橡胶作为高压绝缘材料应用的诸多优势和机理。     

有机硅橡胶将成高压绝缘工业重要材料

有机硅橡胶将逐步取代传统的陶瓷、玻璃，成为高压绝缘工业的重要材料。在日前由GE高新材料集团在北京举办的“硅橡胶在高压绝缘工业中的应用研讨会”上，GE的专家们指出了这一重要趋势，并向与会人十展示了有机硅橡胶作为高压绝缘材料应用的诸多优势和机理。     

有机物在陶瓷工业中的应用(下)

4有机化合物在陶瓷工业中应用实例据有关文献报道，陶瓷工业中使用的有机添加物以每年7％的速度递增，如美国1990年使用了价值两亿美元的有机添加物，而技术陶瓷的产值为150亿美元c现代技术陶瓷的生产与有机添加剂的应用密不可分。有机添加剂主要应用于五种陶瓷成形技术：压制、挤制、薄膜注浆、热压注和注射成形。按陶瓷种类来看，各类陶瓷所消耗的有机添加物的比例大致为：瓷绝缘于占总用量的16％；基片及密封陶瓷元件占18％；火花塞等汽车用瓷占33％；其它（铁氧体、电容器陶瓷与压电陶瓷）占33％。按粘结及增塑、悬浮（分散）、润滑、消…     

玻璃纤维在电工电子材料中的应用

根据电气绝缘材料产品分类法,介绍了玻璃纤维相关制品即以其为补强材料与增强材料的绝缘浸渍玻璃纤维制品、玻璃纤维增强塑料层压制品、玻璃纤维模塑料、云母制品、绝缘粘带与复合制品六类产品连同电磁线的主要规格、性能与用途,以提升玻璃纤维在现代电气绝缘材料产品中的地位。     

玻璃纤维在电工电子材料中的应用

根据电气绝缘材料产品分类法,介绍了玻璃纤维相关制品即以其为补强材料与增强材料的绝缘浸渍玻璃纤维制品、玻璃纤维增强塑料层压制品、玻璃纤维模塑料、云母制品、绝缘粘带与复合制品六类产品连同电磁线的主要规格、性能与用途,以提升玻璃纤维在现代电气绝缘材料产品中的地位。     

玻璃纤维在电工电子材料中的应用

根据电气绝缘材料产品分类法,介绍了玻璃纤维相关制品即以其为补强材料与增强材料的绝缘浸渍玻璃纤维制品、玻璃纤维增强塑料层压制品、玻璃纤维模塑料、云母制品、绝缘粘带与复合制品六类产品连同电磁线的主要规格、性能与用途,以提升玻璃纤维在现代电气绝缘材料产品中的地位。     

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.     

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。     

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.