一种聚双环戊二烯轻量化车门

正本发明公开了一种聚双环戊二烯轻量化车门,包括聚双环戊二烯车门外皮和聚双环戊二烯车门内饰,聚双环戊二烯车门外皮与聚双环戊二烯车门内饰连接。聚双环戊二烯车门外皮和聚双环戊二烯车门内饰均为一体浇注成型。聚双环戊二烯车门外皮和聚双环戊二烯车门内饰之间也可以设置车门骨架。本发明提供的车门克服了现有技术的不足,将传统的金属车门改为较轻的聚双环戊二烯车门,且可     

一种整体式聚双环戊二烯电动车

<正>本发明提供了一种整体式聚双环戊二烯电动车,包括带有轮子的车架,聚双环戊二烯底盘设于所述车架上,所述车架上方设有聚双环戊二烯电动车外壳,聚双环戊二烯电动车外壳内部设有聚双环戊二烯电动车内饰;聚双环戊二烯电动车外壳上除车门外,其它部分为一体浇注成型。本发明将传统的金属电动车改为轻质的聚双环戊二烯电动车,且可省     

双环戊二烯石油树脂的研究进展

综述了双环戊二烯石油树脂的主要特性及应用,并介绍了双环戊二烯石油树脂的最新研究进展,指出了双环戊二烯石油树脂综合利用的途径及发展方向。     

对甲苯磺酸催化合成羟基二氢双环戊二烯

以对甲苯磺酸为催化剂,用双环戊二烯水合制得羟基二氢双环戊二烯。考察了蒸馏水／双环戊二烯（摩尔比）、反应时间、反应温度及对甲苯磺酸（质量比）等主要因素对实验的影响,确立了最佳的工艺条件为：蒸馏水／双环戊二烯（摩尔比）为10：1,反应时间9h,反应温度100℃,对甲苯磺酸质量分数1％。在此条件下产品收率可达到83％,经减压蒸馏之后物质纯度可达到97％。并对所得到的产品进行折光率测定和红外谱图表征。     

双环戊二烯研究新进展

双环戊二烯主要来自石油裂解制乙烯副产物的C5馏分和煤炭焦化副产物.由于双环戊二烯分子结构中同时含有两个不饱和双键,致使其化学性质非常活泼,可与多种化合物反应,生成种类繁多的衍生物,这些衍生物用途非常广泛,因此双环戊二烯及其衍生物产品的研究开发具有广阔的市场应用前景.综述了双环戊二烯的结构、性能、生产及其在高分子材料和精细有机化工领域中国内外研究的最新进展,重点论述了双环戊二烯在不饱和聚酯树脂、双环戊二烯-酚型树脂、聚双环戊二烯材料、环氧树脂、光学有机玻璃材料以及金属有机化合物、农药、香料、金刚烷等产品的合成中的应用.     

双环戊二烯树脂研究

介绍了双环戊二烯的反应特性和双环戊二烯不饱和聚酯树脂的合成方法 ,对双环戊二烯树脂的力学性能及应用等进行了研究。     

高密度烃燃料挂式四氢双环戊二烯的研究进展

综述了由双环戊二烯加氢、异构化制备挂式四氢双环戊二烯的合成方法,概括了双环戊二烯加氢催化剂的种类,比较了几种催化剂的优缺点,并对连续式和间歇式加氢工艺发展现状进行了总结。对桥式四氢双环戊二烯异构化反应催化剂和Lewis酸催化反应过程及机理进行了介绍。提出了加氢及异构化催化剂的发展方向,并提出了改进挂式四氢双环戊二烯合成工艺的建议。     

双环戊二烯及其在有机合成中的应用现状

双环戊二烯分子中含有多个不饱和双键,其化学性质非常活泼,可与多种化合物进行反应,在有机合成上有着广泛的应用。对双环戊二烯的结构与性能及其生产现状进行了介绍,并对其在有机合成方面的应用进行了综述,指出了石油加工业及双环戊二烯资源发展趋势,展望了其广阔的应用前景。     

一种大分子聚合酚改性聚双环戊二烯材料及其制备方法

<正>本发明公开了一种大分子聚合酚改性聚双环戊二烯材料及其制备方法,该改性聚双环戊二烯材料是以双环戊二烯单体、主催化剂、助催化剂及大分子聚合酚为原料,通过反应注射成型工艺制成的;其中,所述双环戊二烯单体、主催化剂、助催化剂的摩     

一种制备间戊二烯和双环戊二烯的系统及方法

<正>本发明公开了一种制备间戊二烯和双环戊二烯的系统及方法。系统包括:第二二聚反应器、碳五及间戊二烯塔、碳六及双环戊二烯塔;碳五及间戊二烯塔为分隔壁精馏塔,塔壁上设置有PD产品出口;碳六及双环戊二烯塔为分隔壁精馏塔,顶部采出DCPD产品。方法包括:(1)碳五馏分进入第二二聚反应器反应,顶部物料进入碳五及间戊二烯塔第一分区,间戊二烯产品由第二分区的间戊二烯产品出     

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。