铜系电磁屏蔽涂料的研究

阐述了电磁屏蔽涂料的电磁屏蔽原理和导电机理;讨论了导电填料的填充量、形状、粒度和填充型导电涂料导电性能的关系;分析了偶联剂、镀覆金属、漆膜厚度及固化条件对导电涂料的导电性能的影响;提出了铜系导电涂料尚需解决的主要问题。     

铜-醇酸电磁屏蔽导电涂料

研究了铜-醇酸电磁屏蔽导电涂料的导电阈值以及偶联剂的种类、用量对其初始导电性能和导电稳定性的影响。结果表明：在醇酸体系中，铜粉的导电阈值为55％；偶联剂的种类和用量对铜-醇酸导电涂料的初始导电性和导电稳定性有影响。     

工艺参数对ATO复合涂料抗静电性能的影响

研究了主要工艺参数对ATO抗静电涂料导电性能的影响,用渗滤模型分析了导电填料含量对涂层导电性能的影响;填料表面处理实验表明,偶联剂能提高ATO的最大填充量。另外,讨论了基体树脂种类、固化工艺对涂层导电性能的影响,并确定了优化的工艺参数。     

填充型丙烯酸树脂导电银浆电性能的研究

研制了一种银粉填充丙烯酸树脂的复合导电银浆，讨论了导电填料银粉的含量、粒径大小、形状对导电银浆导电性能的影响。分析了偶联剂以及固化条件对导电银浆导电性能的影响。     

超细铜粉在导电涂料中的应用研究

本文首先采用液相化学还原法,用抗坏血酸作还原剂或葡萄糖作预还原则,制备了粒径分布范围较窄的超细铜粉,并讨论了以改性超细铜粉为导电填料在导电涂料中的应用。着重研究了影响铜粉导电涂料导电性能的多种因素,例如涂料的固化温度、铜粉含量、固化剂用量等对导电涂料导电性能的影响。     

塑料件用水性导电涂料的研制

以水溶性丙烯酸树脂为基料、银包铜粉为导电填料，制备了一种水性导电涂料，并对其理化性能参数进行了测试。讨论了导电填料、水加入量、分散剂以及固化温度、涂膜厚度等对导电涂料性能的影响，确定了最佳的水性导电涂料组成和工艺条件：树脂用量22％、银包铜粉用量35％～44％、溶剂水的添加量28％-40％、分散剂用量0.62％左右、固化温度55℃。     

银导电涂料导电性能的影响因素

导电性能是银导电涂料使用时的主要性能。本文介绍了现有的多种导电机理,其中宏观上渗流理论被广泛认可。阐述了银粉（含量、形态、粒径及表面改性等）、树脂（种类、相对分子质量及结构等）、溶剂（用量及种类）、助剂以及固化工艺等对涂层导电性能的影响,其中银粉是主要影响 因素。小粒径微米级银片制备的涂层导电性能好,而纳米银粉通常在烧结后有利于提升导电性能;体积收缩率大的树脂涂层导电性更优异;升高固化温度和延长固化时间可以一定范围内提升导电性能。简述了银导电涂料近年来的研究成果以及还待进一步研究的问题。     

用于木材的水性纳米复合导电涂料的制备与性能研究

选用阳离子醚化淀粉为基体,导电炭黑为导电填料,水为分散介质,采用机械共混的方法制备了水性纳米复合导电涂料,通过SEM表征了其微观结构,TG分析了其热稳定性,并研究了水性纳米复合导电涂料制备过程中不同因素对涂料涂覆性能、黏度、导电性能的影响。结果表明:制备过程中乳化时间越短、淀粉含量越大、NaOH含量越少,所得纳米复合导电涂料的黏度越大;所制备的水性纳米复合导电涂料具有良好的导电性,导电炭黑颗粒聚集体均匀地分散在阳离子醚化淀粉基体中,且随着导电炭黑含量的增加,涂层的表面方阻减小;导电涂料的热稳定性好,使用导电涂料的木板粉末喷涂效果良好,固化后表面均匀平整光滑,无明显缺陷。     

环氧树脂基铜粉导电涂料各组分对其导电性能的影响

本研究了固化剂、铜粉含量以及偶联剂用量对铜粉一环氧树脂复合导电涂料导电性能的影响，重点分析了固化剂与铜粉的作用。IR、SEM分析表明：固化剂可以通过与铜形成配合物的反应有效除去铜粉表面的氧化物，产生无氧化的金属表面，极大改善涂料导电性。     

偶联剂对环氧-铜粉复合导电涂料导电性能的影响

笔者研究了两种硅烷偶联剂KH550、KH570，两种钛酸酯偶联剂CTl36、JSC对环氧-铜粉体系导电涂料导电性能的影响。结果表明，加入KH550、KH570后涂层电阻升高，而CTl36、JSC能降低体系电阻，其中以加入质量分数为2％的JSC效果最好。耐候性实验表明加入JSC可有效防止铜粉的氧化。研究了使用JSC的不同方法对导电性的影响，结果表明，偶联剂、铜粉、环氧同时加入，体系初始电阻最低。对比加入偶联剂JSC的导电体系和不加JSC的体系，SEM照片表明合适的偶联剂能有效分散铜粉，利干形成导电网络．     

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。