单组分改性有机硅密封材料

单组分改性有机硅密封材料奥野英一（［日］胶合剂公司）１前言单组份改性有机硅密封材料，在日本首先于１９７９年末上市；当初，只是在汽车的特殊车辆密封中部分应用。１９８２年，在所谓兼备“涂料附着性”、“聚氯乙烯对钢板的良好粘接性”及“强力防霉性”等性能的新...     

建筑工程中节能围护构造中塑料的运用

以建筑工程中节能围护结构为对象,浅谈围护的结构及其能耗分析。针对节能围护结构中常用的三种塑料:聚氨酯、聚苯乙烯、聚氯乙烯进行详细介绍,包括保温隔热材料、密封材料、粘接材料等,并分别就生产工艺、优劣势、应用范围、施工方式等进行比较分析,为近几年塑料材料在节能围护中应用提供了参考。     

纤维增强软木橡胶密封材料的研制

介绍以黄麻短纤维增强软木橡胶密封材料的制备工艺、材料组成及其基本性能，结果表明该材料已达到国外同类产品的水平，可替代进口应用于耐热、耐油、耐水、抗老化等场合，是一种理想的非石棉耐油密封材料。     

机械密封新材料—膨胀（柔性）石墨

随着近代科学技术的飞速发展,各种机械设备(包括水泥机械装备)对密封材料提出了越来越严格的要求,从而推动了密封材料的发展。 密封能力在很大程度上是由材料变形一强度性能所决定的。当然,不同密封结构,对密封材料变形性的要求也各异。密封能力概念,包括密封在使用时,密封材料维持初始接触压力的性质。从这个观点出发,材料的柔韧性、可塑性、流动性还不是材料具有高密封能力的充分条件。而在机械载荷作用下,材料具有弹性并保持原来形状的能力、从而维持恒定的接触压力,这是最希望的密封材料。     

压缩纤维密封材料的耐介质性能测试及比较

参照石棉密封材料耐油性能测试标准和玻璃钢复合材料耐化学介质性能测试标准，对以NBR为主体材料的压缩非石棉纤维密封材料(CFS)和压缩石棉纤维密封材料的耐介质性能进行了测试和比较。结果表明，CFS，尤其是自制CFS的耐介质性能较好，可与压缩石棉纤维密封材料媲美；纤维对CFS的耐介质性能影响显；试验时间在50h以上的耐介质性能试验结果可以较准确地反映CFS的耐介质性能。     

新型密封件的研制

设计了采用高温接枝工艺制备三元尼龙改性丁腈橡胶密封材料的配方,考察了三元尼龙对材料性能的影响。研究结果表明:三元尼龙有效提高了密封材料的耐磨性、耐油性、耐热性以及材料的刚性等,且当主体材料NBR:PA为100:25时,材料具有较好的压缩变形和良好的综合力学性能,尤其是刚性。     

低中放射性废物处置用高整体容器密封材料的制备与性能研究

为开发具备大流动性、高强度和高耐久性能的高整体容器黏接填充密封材料，并使其能满足在低中放射性废物处置过程中多种严酷环境下服役300年的要求，本文以硅酸盐水泥、硅灰为胶凝材料，磨细石英砂为惰性填充材料，通过颗粒最紧密堆积原理获取初步配方，并以硅微粉替代部分水泥后，研究硅微粉对密封材料流变性能、孔隙结构、力学性能、耐久性能以及氮气渗透系数的影响。结果表明：硅微粉提高了密封材料的流动度及流变性能，降低了28和56 d的孔隙率，提高了劈裂抗拉强度、抗收缩性能、抗化学侵蚀性能、抗渗性能以及抗冻性能，但对其抗压强度及静弹性模量作用不明显。加入10%(质量分数)硅微粉的密封材料各项性能均优于国家标准要求，可以满足在严酷环境下安全服役300年要求。     

石墨烯/聚氯乙烯复合材料性能研究进展

利用石墨烯优良的特性与聚氯乙烯复合可赋予复合材料优异的性质。如将石墨烯添加到聚氯乙烯中,可以提高聚氯乙烯的机械性能和导电性能,提高材料的玻璃化转变温度和导热性能,增加材料的电容量和热稳定性等。     

聚氯乙烯弹性体树脂在汽车上的应用

一、前言 聚氯乙烯弹性体树脂在汽车构件方面应用非常广泛,可用于方向盘、喇叭按钮、变速杆套、球形捏手、自动装置旋钮、电唱机臂架、头枕等内装构件,以及滴水槽、窗框料等密封材料,部分边嵌条等外装材料,而且用作泄油管、垫圈、手柄套、电气配线等     

耐开裂环氧树脂灌注胶

本文介绍了一种环氧树脂灌注密封材料，以及该材料的制备、性能及特性。     

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。