蓖麻油基聚氨酯灌封胶的固化行为研究（Ⅱ）固化过程中异氰酸根含量变化和热量变化

以蓖麻油、4,4‘－二苯基甲烷二异氰酸酯（MDI）、三羟甲基丙烷（TMP）与1,2－丙二醇为原料合成 了蓖麻油基聚氨酯灌封胶,研究了它们在固化过程中－NCO的含量变化和热量变化。结果表明,100℃以下固化反应级数1．31,固化反应活化能为6．66kJ/mol,完成固化时间53min以上,湿度使反应级数增高,综合考虑胶D具有较佳的性能。     

耐辐射无卤阻燃绝缘EPDM电缆胶料的研究

本研究耐辐射无卤阻燃绝缘ＥＰＤＭ电缆胶料的主要配合为：生胶为乙烯含量较高的１，４－己二烯型电绝缘级ＥＰＤＭ（１００份）；阻燃剂为氢氧化铝／氢氧化镁／三氧化二锑并用体系（９５～１００份），其中氢氧化铝和氢氧化镁用硬脂酸锌进行表面处理；补强填充剂为煅烧陶土、ＬＥＥ白滑粉、ＰＹ－Ⅱ型水白云母粉和钛白粉并用体系（１０５～１１５份）；硫化剂为２，５－二甲基－２，５－二（叔丁基过氧化）己烷（４～５份），共硫化剂为三羟甲基丙烷三甲基丙烯酸酯和Ｎ，Ｎ′－间亚苯基双马来酰亚胺并用体系（１．６～１．８份）。胶料和成品的物理机械性能、介电性能、阻燃性能和耐环境性能（耐热性、耐蒸汽性和耐辐射性）达到ＩＥＣ５０２（１９９４）和ＩＥＣ１８Ａ（１９８１）（ＣＯ）标准。     

酚醛型环氧树脂增韧双马来酰亚胺的研究

本文研究了二苯甲烷型双马来酰亚胺（ＢＭＩ），４，４’－二胺基二苯基甲烷（ＤＤＭ）及酚醛型环氧树脂（Ｆ－５１）的共固化－交联网络结构的ＢＭＩ树脂改性系统。它具有耐高温，韧性好，吸水率低和易于固化的特性。固而有可能成为新型耐高温复合材料的树脂基体之一。     

N—甲基—N—羟乙基苯胺制备

以Ｎ－甲基苯胺和环氧乙烷为原料，采用气相非均相法合成了Ｎ－甲基－Ｎ－羟乙基苯胺。在反应温度１２０－１４０℃，反应压力０．４－０．６ＭＰａ，催化剂 ０．３％－０．４％的条件下，得到了较好的产品质量和收率。     

DSC法研究偶联剂存在下的环氧树脂固化动力学

本文用ＤＳＣ热分析数据，计算出Ｅ－４４环氧树脂与ＤＤＭ（二氨基二苯基甲烷）固化反应的动力学参数，并讨论了偶联剂Ｔｃ－１１４的影响。     

固化剂在环氧树脂／氧化铝界面上的定位

本文选用环氧树脂／４，４＇－二氨基二苯基甲烷（ＤＤＭ）固化剂体系，并使它们在氧化铝表面上固化，以研究固化后的环氧树脂／氧化铝界面的结构和相互作用。把固化在氧化铝表面上的环氧树脂浸入０．１Ｎ ＨＣｌ溶液中，以溶解掉氧化铝薄膜，即产生了环氧树脂／氧化铝界面。利用Ｘ－射线光电子能谱法和接触角测定，分别测定表面和界面结构及表面自由能，利用傅里叶变换红外光谱法测定了环氧树脂和ＤＤＭ在Ａｌ２Ｏ３粒子上的竞争吸     

三羟甲基丙烷现状及应用

三羟甲基丙烷现状及应用张效梅，李凤芝ＴＲＩＨＹＤＲＯＭＥＴＨＹＬＰＲＯＰＡＮＥＡＮＤＲＴＳＡＰＰＬＹＣＡＴＩＯＮ１前言三羟甲基丙烷是一种稳定的三元醇，是一种重要的化学品，三羟甲基丙烷为白色或无色晶体，溶于水和乙醇、丙酮等有机溶剂，吸湿。观点为２９２℃...     

低熔点芳香胺环氧固化剂的研究I,DEDDM,MEDDM,DDM的共混物

本文通过苯胺和邻乙基苯胺的混和物加入甲醛缩合得到常温下为液体的３，３＇－二乙基－４，４＇－二氨基二苯甲烷（ＤＥＭＭＤ），３－乙基－４，４＇－二氨基二苯甲烷（ＭＥＤＤＭ）和４，４＇－二氨基二苯甲烷（ＤＤＭ）的三元共混物。紫外光谱，红外光谱，色质联用谱仪均证实了这一结果。并用ＪＳＲ固化仪和热分析仪（ＤＳＣ）对该共混物固化Ｅ－５１环氧树脂的过程进行了跟踪，得到了等温和等速升温反应活化能。最后采用ＴＭＡ及     

高纯三羟甲基丙烷三甲基丙烯酸酯的合成

本文介绍一种高收率地制备高纯度三羟甲基丙烷三甲基丙烯酸酯的方法。在反应器中先由甲基丙烯酸与氯化亚砜制得甲基丙烯酰氯,然后使其同三羟甲基丙烷反应得到产物。所制得的高纯三羟甲基丙烷三甲基丙烯酸酯可用于合成光敏涂料及其它精细化工产品。     

蓖麻油基聚氨酯灌封胶的固化行为研究（Ⅰ）固化过程中的流变行为和凝胶时间

以蓖麻油,4,4’-二苯基甲烷二异氰酸酯(MDI)、三羟甲基丙烷(TMP)与1,2-丙二醇为原料合成了蓖麻油基聚氨酯灌封胶,研究了灌封胶的固化流变行为和凝胶化时间。结果表明,该灌封胶初始粘度低,在20℃时不超过1600mPa     

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。