纳米凹凸棒活性体的合成及在UV涂料中的应用研究

采用等物质的量的甲苯二异氰酸酯、丙烯酸-β-羟乙酯加成,得到的加成物与纳米凹凸棒表面的羟基官能团再次进行加成反应,生成表面结合双键的纳米凹凸棒中间体,然后与活性稀释剂、光引发剂、颜料、填料和其他助剂复配,制备的紫外光固化涂料具有良好的抗蚀性、耐热性、耐磨性、自洁性和环境友好性。用IR和SEM对活性体和共聚物进行了表征。     

无机涂料

201202017无机粒子分散体及其固化涂膜和制备:JP2011-157436[日本专利公开]/日本:DIC Corporation(Arai,Hisayoshi).-2011.08.18.-17页.-201018401(2010.01.29);IPC C08F290/12题述无机分散体中的无机粒子分散于聚合有机组分中。该无机粒子用有机硅氧烷(含通过光能或热能可引发加成反应的基团)进行表面处理。该聚合有机组分是加成产物,由含环氧基的(甲基)丙烯酸聚合物和含(甲     

PAA/ATP纳米复合材料的制备及其皮革阻燃性

采用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)改性纳米凹凸棒土(ATP),制得表面含双键的凹凸棒土(O-ATP),进而与丙烯酸发生共聚反应,制备了聚丙烯酸/凹凸棒土(PAA/ATP)纳米复合材料,采用FTIR、TEM、TGA对其结构进行分析,结果表明:成功制备了PAA/ATP纳米复合材料,ATP均匀地分散于PAA/ATP纳米复合材料中。当ATP用量为1%时(即ATP质量占丙烯酸质量的百分数,下同),PAA/ATP纳米复合材料的外观稳定性和热稳定性均最好。将PAA/ATP纳米复合材料应用于绵羊蓝湿革的复鞣工序中,结果表明:ATP的引入有利于提高革样的阻燃性能、增厚性能。当ATP用量为1%时,PAA/ATP纳米复合材料的极限氧指数提升至16.4%,燃烧速率降低至0.045 mm/s。     

AC/XG-g-PAA复合高吸水树脂的制备及性能研究

利用溶液聚合法制备了AC/XG-g-PAA有机-无机复合高吸水性树脂。研究了丙烯酸用量、引发剂用量、丙烯酸中和度、凹凸棒黏土用量、交联剂用量和聚合反应温度等因素对合成复合高吸水性树脂性能的影响,利用傅立叶变换红外光谱仪(FTIR)、扫描电镜仪(SEM)、X射线衍射仪(XRD)和示差扫描量热仪(DSC)对产物进行表征。结果表明,丙烯酸分子与黄原胶发生接枝共聚,凹凸棒黏土与接枝共聚物发生了有机-无机复合,制备的AC/XG-g-PAA高吸水性树脂具有良好的吸水和抗盐性能,提高了高温保水性能,接枝率达137.2%,接枝效率达83.6%,最高吸水倍率达896g/g,吸盐水倍率达126.3g/g。     

AC/XG-g-PAA复合高吸水性树脂的制备及性能研究

利用溶液聚合法制备了AC/XG-g-PAA有机-无机复合高吸水性树脂。研究了丙烯酸用量、引发剂用量、丙烯酸中和度、凹凸棒黏土用量、交联剂用量和聚合反应温度等因素对合成复合高吸水性树脂性能的影响,利用傅立叶变换红外光谱仪(FTIR)、扫描电镜仪(SEM)、X射线衍射仪(XRD)和示差扫描量热仪(DSC)对产物进行表征。结果表明,丙烯酸分子与黄原胶发生接枝共聚,凹凸棒黏土与接枝共聚物发生了有机-无机复合,制备的AC/XG-g-PAA高吸水性树脂具有良好的吸水和抗盐性能,提高了高温保水性能,接枝率达137.2%,接枝效率达83.6%,最高吸水倍率达896g/g,吸盐水倍率达126.3g/g。     

纳米复合涂料

适用于为材料表面提供除氨氧化物作用的涂层并赋予自清洁性能的组合物，具有自组装单层的纳米粒子表面的纳米水稀释涂料的制备方法，贮存稳定性、导电性、模塑性、成膜性、耐水性、耐候性及硬度俱佳的含纳米物质的组合物，胶原-In2O3纳米复合低红外发射率涂料的制备及性能研究，纳米凹凸棒无机/有机共聚物涂料的研究。     

水溶性纳米富勒烯改性丙烯酸树脂的合成及应用研究

将纳米C60/C70直接引入到丙烯酸(酯)共聚物中,合成得到具有耐热性和抗紫外线功能的水溶性C60/C70-丙烯酸(酯)共聚物.     

纳米SiO2胶体改性零VOC叔氟乳液的制备及其性能的研究

以纳米SiO2胶体、叔碳酸乙烯酯、(甲基)丙烯酸六氟丁酯、(甲基)丙烯酸及其酯等为原料制备了新型纳米材料改性叔氟共聚物乳液,研究了反应温度、有机氟单体用量、乳化剂配比等对乳液聚合的影响,并对制备的乳液进行了红外、紫外、机械稳定性等的表征.     

发展中的丙烯酸/酯

<正> 一、引言丙烯酸是最简单,也是工业上最重要的不饱和羧酸,是市场上广泛需要的丙烯酸/酯共聚物的基本原料。丙烯酸及其酯类衍生物,在化学结构式中均有不饱和碳—碳双键和羧基或羧基衍生的特性功能团(例如羧基—COOH,酰胺基—CONH_2,氰基—CN等等)。在化学反应方面,丙烯酸/酯易于发生均聚或共聚作用,并能与多种化合物反应,合成一系列衍生     

RAFT法合成丙烯酸十八酯/丙烯酸异辛酯嵌段聚合物

RAFT即可逆加成—断裂链转移,它能够成功的实现自由基聚合的活性/可控性。本文以咔唑二硫代甲酸苄基酯为RAFT试剂,合成了丙烯酸十八酯,丙烯酸异辛酯的均聚物,以及丙烯酸十八酯-丙烯酸异辛酯嵌段共聚物。本文在实验中建立了测定单体丙烯酸酯聚合转化率的方法并利用DSC测定了各聚合物的结晶特性,以此反映聚合物的结构特征。     

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.     

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.     

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。     

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.