酚醛模塑料耐高温性的研究

采用一种自制的苯酚甲醛树脂和复合固化体系，以无机玻璃纤维为增强材料，得到一种可注射成型的酚醛模塑料，对其耐高温性能进行了研究。热变形温度及TGA测试表明该材料耐高温性能优异，热变形温度达到272℃；温度在401℃时仅失重5％。     

专利产品

抗辐射药用聚氯乙烯硬片及其制造方法；塑料光纤维、塑料光导纤维电缆和带插头的光导纤维电缆以及共聚物；抗菌型酚醛模塑料；一种超高粘度尼龙6工程塑料的连续生产方法；耐高温无机纤维增强的注射型酚醛模塑料；生物降解塑料母料的制备方法     

酚醛BMC

美国最大的预制整体模塑料（BMC）生产商BMC公司宣布推出酚醛基模塑料。新的BMC—X—Cel针对耐高温用途如汽车盖下零件和排气部件，以及油箱、仪表等而设计。据称玻纤填充酚醛BMC在220℃性能保持85％以上，300℃性能保持60％以上。     

固体可熔性酚醛树脂模塑料的研制

合成了羟甲基型固体可熔性酚醛树脂(resol),将resol和novolak树脂复配,加入质量分数50%左右的玻璃纤维,采用高速混炼机混合,加入增塑剂,应用双辊塑炼机混炼该组成物,制备出高端整流子用酚醛模塑料(EA-5801J等)。对该注射料的耐高温性能和力学性能等进行了测试,结果表明,该模塑料耐高温性能和力学性能优于热塑性酚醛树脂模塑料,而注射加工性能优于液体resol树脂模塑料。     

酚醛模塑料改性及成型工艺研究进展

综述了酚醛模塑料及其成型工艺的研究进展。酚醛模塑料的改性方法主要包括基体树脂改性和填充改性,其中基体树脂改性可细分为结构改性、共聚改性和共混改性等。介绍了酚醛模塑料的主要成型工艺,包括模压成型工艺和注射成型工艺。分析了后固化处理工艺对产品性能的影响,并对今后的发展趋势进行了展望。     

酚醛BMC

美国最大的预制整体模塑料（BMC）生产商BMC公司宣布推出酚醛基模塑料。新的BMC—X—Cel针对耐高温用途如汽车盖下零件和排气部件，以及油箱、仪表等而设计。据称玻纤填充酚醛BMC在220℃性能保持85％以上．300℃性能保持60％以上。材料在149～188℃固化约1min，根据使用性能要求还需要在177℃后烘烤20min～2h。     

酚醛模塑料注射成型工艺及其进展

综述了酚醛模塑料注射成型工艺发展概况、成型原理、原料要求和工艺条件,以及国外此品种的开发与工艺技术进展.     

玻纤增强酚醛模塑料性能及应用

对木粉增强酚醛模塑料与玻纤增强模塑料的性能进行了比较,结果表明玻璃纤维增强模塑料在冲击性能、耐高温性能及绝缘性能等方面均有所提高,并对玻纤的增强机理进行了简要的分析。同时对玻璃纤维增强酚醛模塑料在汽车工业和电子行业中的应用进行了总结,并论述了玻纤增强酚醛模塑料的发展趋势。     

有机纤维增强的耐热型酚醛模塑料的研制

介绍了一种有机纤维增强的、可注塑成型的、热性能优越的酚醛模塑料EA—5555J的制备方法。酚醛模塑料采用有机纤维增强，使新产品的耐热温度可达到190℃以上，耐漏电痕迹CTI为3级，阻燃性等级为94V—0／1．6mm。     

聚砜、复合增韧剂改性酚醛模塑料的耐油性研究

通过采用聚砜、复合增韧剂对酚醛模塑料进行改性，成功制得了一种耐油型酚醛模塑料。分别在200℃和170℃的仪表油中浸泡24h和100h，测其力学性能和电绝缘性能，结果表明，除垂直纤维方向的压缩强度外，各项性能保持率均达95％以上。采用SEM等手段对改性模塑料进行研究和分析，并同国外同类材料进行比较，发现聚砜、复合增韧剂改性酚醛模塑料具有优异的力学性能、电绝缘性能和耐滑油性能。     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

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.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009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、环氧树脂、不饱和聚酯树脂)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。     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

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.