无卤阻燃胶粘剂在挠性覆铜板中的应用研究

运用磷阻燃、成碳阻燃和橡胶增韧技术,制备一种无卤阻燃的改性环氧树脂胶粘剂,应用于聚酰亚胺薄膜基挠性覆铜板中,考察了涂胶厚度及固化工艺对板材性能的影响,得到合适的固化条件是160℃、2 h。板材不含有卤素,具有优秀的剥离强度、耐折性、耐化学性、耐热性和电性能,阻燃性达到UL94 V-0级,性能达到IPC-4204A标准要求。     

本体阻燃丙烯酸酯胶粘剂的合成及其在挠性覆铜板中的应用

以丙烯酸、氯化亚砜、2,4,6-三溴苯酚为基本原料,选择适宜的工艺条件通过两步法合成了2,4,6-三溴丙烯酸苯酯。以2,4,6-三溴丙烯酸苯酯为单体,通过乳液聚合得到了本体阻燃丙烯酸酯聚合物。并研究了不同配比的丙烯酸酯胶粘剂制得的挠性覆铜板的阻燃性能、力学性能和热学性能。     

环氧树脂基覆铜板耐热老化性研究

利用Arrhenius方程的老化动力学模型研究了环氧树脂基覆铜板的耐热老化性能。研究结果表明,固化体系、阻燃体系以及主体环氧树脂的结构直接影响覆铜板的耐老化性能。酚醛树脂固化体系覆铜板的耐热老化性优于双氰胺固化体系,磷系阻燃的覆铜板耐热老化性优于溴系阻燃体系,配方中添加具有刚性结构的环氧树脂有利于提高覆铜板的耐热老化性。     

覆铜板的发展及其对环氧树脂的新要求

本文介绍了覆铜板的组成、加工技术和发展及其对环氧树脂的新要求。对涂树脂铜箔、积成法多层覆铜板、环保型覆铜板和无卤阻燃树脂也进行了简要介绍。     

挠性覆铜板用无卤阻燃环氧树脂及其固化剂的研究进展

为了适应无卤无铅绿色环保发展要求,挠性覆铜板(FCCL)的环保性能越来越受到大家的重视。目前FCCL最常用的材料为环氧树脂胶黏剂,虽然添加型阻燃剂能达到阻燃效果,但是对力学性能影响很大。所以,反应型的环氧树脂及其固化剂的无卤化是FCCL无卤化的两个重要方面。综述了近年来国内外在无卤阻燃环氧树脂(含磷、含硅、含氮环氧树脂及苯酚-芳烷基型自熄性环氧树脂)及其固化剂(含磷、含硅固化剂,含氮酚醛树脂和苯酚-芳烷基型环氧树脂固化剂)的研究进展,并对其今后的发展做一展望。     

聚酯薄膜挠性覆铜板的制备及性能研究

以饱和聚酯树脂、异氰酸酯、环氧树脂为主要原料,配制了一种聚氨酯胶粘剂,通过在聚酯薄膜上涂布,再与铜箔热压覆合,制备了聚酯薄膜挠性覆铜板。分析测试聚酯薄膜挠性覆铜板的耐热性、柔软性、耐挠曲性和耐折性等性能,结果显示板材在250℃耐浮焊性测试时没有熔融,表现出良好的耐热性、优异的柔软性和优秀的综合性能。     

磷溴阻燃环氧树脂的制备及应用

以双酚A型环氧树脂(E-51)、四溴双酚A、9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)或10-(2,5-二羟基苯基)-10-氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO-HQ)为原料,合成了2种磷溴阻燃环氧树脂(简称PB-1016、PBHQ-1016),然后与双酚A型酚醛树脂固化反应制备了覆铜板,采用红外光谱,凝胶渗透色谱,热重分析及阻燃性测试对磷溴阻燃环氧树脂和覆铜板进行了结构表征与性能研究。结果表明,磷溴阻燃环氧树脂具有明显的协同阻燃效应,并可提升含溴阻燃覆铜板的耐热性和相比漏电起痕指数(CTI)。PBHQ-1016具有良好的热稳定性,以其制备的覆铜板的阻燃性、耐热性、粘接性和CTI等性能表现较优,综合性能最佳。     

阻燃型聚酰亚胺覆铜板胶粘剂的研究和应用

在双马－丁腈胶中加入１５％含溴有机阻燃剂和适量无机阻燃剂时,可使聚酰亚胺覆铜板具有阻燃性,制成的ＦＰＣ仍具有较好的剥离强度和耐锡浴性,这种阻燃胶粘剂可在２．０７ＭＰａ、１７０℃／６０分钟的条件下固化。     

含磷环氧树脂及其在无卤阻燃覆铜板中的应用研究进展

针对含磷环氧树脂在覆铜板无卤阻燃及其它方面的广阔应用前景,简述了含磷阻燃剂的阻燃机理,详细介绍了反应型含磷阻燃环氧树脂体系的研究状况,并指出含磷环氧树脂的发展方向。     

挠性覆铜板的研究进展

随着电子工业的迅猛发展,人们对覆铜板(CCL)行业提出了更高的要求,挠性覆铜板(FCCL)由于其优异的性能从中脱颖而出。文章主要介绍了挠性覆铜板的结构、种类、制造方法以及发展状况,同时对挠性覆铜板的专利申请状况进行了简要的分析。     

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。