炭黑填充NR和S—SBR硫化胶动态性能及屈挠破坏性的研究

探讨炭黑种类及用量对天然橡胶（NR）和溶聚丁苯橡胶（S—SBR）硫化胶的耐屈挠破坏性及动态力学性能的影响。结果表明,随着炭黑N234、N330用量的增大,NR和S—SBR两种硫化胶的耐屈挠破坏性降低;随炭黑粒径增大,炭黑用量对两种硫化胶的耐疲劳破坏性的影响逐渐减小;NR硫化胶的耐初始疲劳破坏性明显优于S—SBR硫化胶,随屈挠次数的增加,两者间的差距逐渐减小。炭黑用量增加,NR和S—SBR硫化胶的损耗因子峰值（tanδmax）减小,高于10℃时（高弹态）的tanδ值增大,S—SBR较NR具有更好的抗湿滑性和相差无几的低滚动阻力。炭黑粒径减小,NR和S—SBR硫化胶的tanδmax减小,填充30质量份炭黑时,N660增强的两种硫化胶在0℃时tanδ值较高,60℃时最低,具有较好的动态性能。     

TPI/HVBR/SBR共混物的性能

对高反式－1，4－聚异戊二烯（TPI）／高乙烯基聚丁二烯橡胶（HVBR）／SBR共混物的综合物理性能和动态力学性能进行研究。结果表明，共混物中TPI／HVBR／SBR并用比为10／20／70时，共混物具有较低的滚动阻力和动态生热及优异的耐屈挠疲劳性和耐磨性，与TPI／SBR（并用比为30／70）比较，其抗湿滑性提高（0℃时的tanδ值增大76．3％）。在SBR用量为70－50份，TPI用量为15－25份和HVBR用量为15－35份范围内，共混物具有良好的综合性能，滚动阻力和抗湿滑性获得平衡，同时具有优异的耐磨性和耐屈挠疲劳性，是高性能胎面胶料的较理想配合。     

针状硅酸盐/SBR复合材料的性能研究

对凹凸棒石进行表面改性得到预处理凹凸棒石（PAT），研究PAT／SBR复合材料的加工性能、物理性能及动态力学性能等。结果表明，PAT用量增大，PAT／SBR复合材料的门尼粘度先升后降，t10和t90缩短，邵尔A型硬度、定伸应力和拉伸强度提高，耐磨性能下降，压缩疲劳温升、永久变形和损耗因子tanδ值增大；PAT和预处理白炭黑（PWCB）用量相同时，PAT／SBR复合材料的门尼粘度、压缩疲劳温升和tanδ值小于、静压缩率和初动压缩率大于PWCB／SBR复合材料。     

苯乙酮-环己酮-甲醛共缩聚树脂的合成研究

以苯乙酮、环己酮和甲醛为原料，氢氧化钠为催化剂合成苯乙酮-环己酮-甲醛共缩聚树脂，研究了环己酮/苯乙酮摩尔比、预反应时间、甲醛加料方式等对树脂软化点和羟值的影响，借助FT—IR及^1H-NMR对聚合产物进行了表征。发现在醛酮摩尔比为1．3、环己酮/苯乙酮摩尔比为1．0、氢氧化钠用量为3．0％（质量分数）、预反应时间为1．5h、甲醛一次性加入时，可获得软化点为51．3℃、羟值为119．0mgKOH／g的苯乙酮-环己酮-甲醛树脂。FT—IR和^1H—NMR结果表明通过预反应有利于苯乙酮参与共缩聚反应。     

苯乙酮-甲醛树脂的合成研究

以苯乙酮和甲醛为原料，氢氧化钠为催化剂合成苯乙酮-甲醛树脂，考察催化剂用量、醛酮摩尔比、反应时间等对树脂软化点和羟值的影响，借助Fr—IR及1H—NMR对聚合产物进行了表征。发现在醛酮摩尔比为1．0、氢氧化钠用量为3．0％（质量）、反应时间为7h时，可获得软化点为80．0℃，羟值为23．3mgKOH／g的苯乙酮-甲醛树脂。树脂的FT-IR和^1H—NMR图谱表明苯乙酮甲基上的α—H与甲醛发生缩聚反应。     

乙烯-辛烯共聚物/SBR共混物的研究

研究了乙烯-辛烯共聚物（POE）/SBR共混物的力学性能和相态结构。结果表明,随着POE8180（辛烯质量分数为0.28）/SBR共混比（除50/50外）增大,共混物的力学性能提高,POE8003（辛烯质量分数为0.18）用量不超过40份时,随着POE8003/SBR共混比增大,共混物的力学性能提高;POE8003制成粘度较大的炭黑母粒后再与SBR母炼胶共混,可提高共混物的力学性能;POE8180与SBR的共混温度为120℃时共混物的综合力学性能最佳;POE8180/SBR共混物为两相结构,POE8180/SBR共混比为40/60时共混物呈互穿网络结构。     

二苯基硅烷改性白炭黑对SBR性能的影响研究

以二苯基硅烷作改性剂制备了改性白炭黑，研究了二苯基硅烷用量对白炭黑补强SBR性能的影响。结果表明，加入二苯基硅烷后，SBR胶料焦烧时间、工艺正硫化时间及最高转矩均明显增大，最低转矩逐渐减小；加入二苯基硅烷对SBR硫化胶力学性能有一定的改善作用；当用量为2份时，SBR硫化胶综合力学性能较好。随着二苯基硅烷用量的增大，SBR硫化胶0℃损耗因子tanδ略有增大，60℃损耗因子tanδ略有减小；白炭黑在SBR中的附聚体尺寸明显降低；当其用量为1份时，白炭黑附聚体尺寸达到最小值9.46μm。     

一种设计无机介质材料介电性能的新方法

选用低介电常数的无机介质材料ZnO -B2 O3-SiO2 三元系统 ,进行了XRD和介电性能定量关系的研究 ,系统的主、次晶相为SiO2 、Zn2 SiO4 相。调整各组分 ,获得了超低介电常数的介质陶瓷 ,其介电性能为 :ε≈ 5 ,tgδ≤ 5× 10 -4 ,αc≤ 0± 30ppm/℃ ,IR≥ 10 12 Ω ,烧结温度为 1140℃。通过对系统所进行的X 射线衍射分析 ,探讨了用X 射线衍射峰强度计算各物相含量的方法 ,并代入李赫德涅凯对数混合定则 ,计算出系统的介电性能 ,从而获得了一种设计无机材料系统介电性能的新方法     

SBR1721与SBR1712的性能对比研究

对SBR1721与SBR1712的性能进行了对比研究。结果表明，SBRl721与SBR1712相比，生胶和胶料的加工性能相近，硫化胶的硬度较高，拉伸强度、扯断伸长率较大，300％定伸应力和撕裂强度相当，抗湿滑性和操纵性较好，生热稍高，耐磨性较差。SBRl721是高速轿车子午线轮胎胎面胶理想的胶种。     

低温对于脱氮效果影响的试验研究

研究了低水温条件下实现高效脱氮的可行性以及系统稳定运行的控制方式.采用了序批式(SBR)工艺研究了不同温度和运行周期对脱氮效果的影响.试验结果表明在15℃时,周期为8h和周期为12h的反应器在脱氮效果上没有明显区别.在低于7℃时,与周期为8h的对比发现周期为12h的反应器表现出较高的硝化速率和较低的反硝化速率.脱氮效果与温度降低之间的关系不是连续的.在硝化反应中温度系数θN=1.03(7～15℃),θN=1.41(3～7℃);反硝化反应中温度系数θDN=1.05(7～15℃),θDN=1.4(3～7℃).在3℃时,控制较低负荷0.07 kgBOD/(kgMLSS·d)可达到良好的脱氮效果.     

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.     

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。     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.