水性聚氨酯膨胀型阻燃涂料的研究进展

水性聚氨酯涂料若未经阻燃处理,存在引发火灾的隐患,因此水性聚氨酯的阻燃研究是水性聚氨酯功能化的重要方向之一。介绍了水性聚氨酯阻燃涂料的分类,按不同分类标准可分为共混复配型和反应型,膨胀型和非膨胀型。对水性聚氨酯阻燃涂料阻燃效应和阻燃机理进行了探讨,并重点介绍水性聚氨酯膨胀型阻燃涂料的研究现状。最后提出了现在水性聚氨酯膨胀型阻燃涂料存在的问题,并对水性聚氨酯膨胀型阻燃涂料的发展趋势进行了展望。     

膨胀型阻燃剂NP430对三元乙丙橡胶阻燃性能的影响

采用膨胀型阻燃剂NP430填充三元乙丙橡胶(EPDM),研究其阻燃性能.结果表明:膨胀型阻燃剂NP430对EPDM具有很好的阻燃效果,外加酸源乙烯-醋酸乙烯共聚物(EVA)和碳源高苯乙烯(HS)树脂具有更好的协同阻燃作用.当EPDM/EVA/HS并用比为80/8.6/11.4、膨胀阻燃剂NP430用量为90份时,极限氧指数可达47.6.填充石蜡油会明显降低EPDM的阻燃性能,但不影响燃烧膨胀过程.而填充少量甲基丙烯酸锌、酚醛树脂等有机填料对EPDM的阻燃性能影响很小;填充炭黑、白炭黑、碳酸钙、可膨胀石墨等无机填料会导致燃烧产生的气体逸出,严重不利于膨胀过程,导致膨胀型阻燃剂不能发挥阻燃作用.     

膨胀石墨协效剂在膨胀型阻燃涂料中的应用

介绍了膨胀型阻燃涂料的组成和阻燃机理,以及膨胀石墨协效剂在膨胀型阻燃涂料中的应用,并对阻燃技术的发展前景进行了展望。     

膨胀型阻燃聚丙烯的研究进展

介绍了膨胀型阻燃聚丙烯的阻燃机理,并对膨胀型阻燃聚丙烯的研究现状进行了综述。     

膨胀型阻燃剂的制备和阻燃机理研究进展

膨胀型阻燃剂是阻燃性能优异的无卤阻燃剂，在阻燃过程中具备低烟、低毒、防火效率高等特性，是目前阻燃剂研究的1个重要方向。文章介绍了膨胀型阻燃剂的不同分类与组成以及膨胀型阻燃剂阻燃机理，总结了现有的膨胀型阻燃剂的研究进展，重点从膨胀型阻燃剂表面改性、单成分膨胀型阻燃剂开发、阻燃协同剂的使用和新型膨胀型阻燃剂组分等方面进行阐述和总结，指出膨胀型阻燃剂发展需要解决的问题。未来膨胀型阻燃剂应该向绿色化、环保化方向发展。     

膨胀阻燃聚丙烯体系研究进展

综述了膨胀型阻燃剂的组成和阻燃机理,重点介绍了近年来国内外膨胀阻燃聚丙烯体系的研究进展,并对聚丙烯膨胀型阻燃体系的研究进行了归纳和总结。     

膨胀型阻燃剂的研究进展

介绍了膨胀型阻燃剂的组成(酸源、炭源、气源)、分类(有机含磷膨胀型阻燃剂和无机膨胀型石墨阻燃剂)、阻燃机理及研究现状,列举了磷-氮膨胀型阻燃剂和膨胀石墨阻燃剂两种膨胀型阻燃剂的研究及应用现状,并分析了这两种阻燃剂在应用过程中的阻燃机理及阻燃效果。最后提出了要从协同阻燃、表面改性、微胶囊技术等方面来提效膨胀型阻燃剂的发展趋势。     

无卤阻燃ABS/空心微珠复合材料的研究

研究了膨胀型阻燃剂、空心微珠、膨胀型阻燃剂／空心微珠对ABS树脂力学、加工及阻燃性能的影响。结果表明：膨胀型阻燃剂对ABS有一定的阻燃效果，且与空心微珠存在协同作用；在ABS／膨胀型阻燃剂／空心微珠(80／20／20)阻燃体系中，加入5份的弹性体SBS时，可使ABS复合材料获得较佳的综合性能。     

膨胀型阻燃剂及膨胀阻燃聚丙烯性能的研究

本文主要研究了无卤阻燃剂聚磷酸铵及由聚磷酸铵、季成四醇、三聚氰胺组成的膨胀型阻燃 剂对聚丙烯阻燃性能的影响,并且研究了红磷与膨胀型阻燃剂的协效作用,同时测试了各阻燃体 系的拉伸强度和熔融指数。     

膨胀型阻燃剂在聚丙烯中的应用研究进展

综述了近年来聚丙烯（PP）阻燃用膨胀型阻燃剂的研究应用现状,简要概述了膨胀型阻燃剂的阻燃机理,分析了膨胀型阻燃存在的不足,指出了膨胀型阻燃剂发展方向。     

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。