双功能交联剂WY988在轮胎胎肩垫胶中的应用

研究双功能交联剂WY988在轮胎胎肩垫胶中的应用.结果表明:在胎肩垫胶中加入双功能交联剂WY988,胶料的t10和t90缩短,抗硫化返原性能提高,损耗因子(tanδ)减小;随着双功能交联剂WY988用量的增大,硫化胶的物理性能下降,tanδ增大;双功能交联剂WY988用量为0.5份,同时减小硫黄或促进剂的用量,硫化胶的物理性能较好,tanδ减小,成品轮胎的耐久性能提高.     

多功能交联剂WY988在全钢载重子午线轮胎胎肩垫胶中的应用

研究多功能交联剂WY988在全钢载重子午线轮胎胎肩垫胶中的应用。结果表明,在胎肩垫胶中加入多功能交联剂WY988,胶料的抗硫化返原性能显著改善,定伸应力增大,老化前后的拉断永久变形小,成品轮胎的耐久性能提高。     

多功能交联剂WY988对跑气保用轮胎支撑胶性能的影响

研究多功能交联剂WY988对跑气保用轮胎支撑胶性能的影响。结果表明：在支撑胶配方中加入多功能交联剂WY988,胶料的抗硫化返原性能提高,硫化胶的硬度和定伸应力增大,耐屈挠性能不变,损耗因子减小;上下模支撑胶的硬度之差减小,成品轮胎的耐久性能提高。     

全钢载重子午线轮胎胎肩胶的研究

本文通过应用多功能交联剂WY988,并调整填充补强体系等手段改善了全钢子午线轮胎胎肩垫胶的综合性能,结果表明,在胎肩胶中使用多功能交联剂WY988,硫化胶硫化返原程度减轻;在此基础上,使用30phr炭黑N660替代27phr炭黑N330,可明显降低胶料的压缩疲劳生热性能,成品胎的耐久性能有显著提升。     

交联剂WY988在天然橡胶胶料中的应用研究

采用全钢载重子午线轮胎胎面基部胶配方,考察国产交联剂WY988对天然橡胶(NR)胶料性能的影响,并与国外同类产品交联剂KA9188进行对比。结果表明:分别采用交联剂WY988与KA9188部分替代促进剂NS的胶料硫化速度快,交联密度和定伸应力大;采用交联剂WY988的胶料与采用KA9188的胶料硫化特性、抗硫化返原性能和物理性能基本相当;交联剂WY988对降低胶料生热的作用比交联剂KA9188大。     

全钢载重子午线轮胎胎肩垫胶的配方优化

对全钢载重子午线轮胎胎肩垫胶的配方进行优化。结果表明：通过加入多功能交联剂WY988,并适当调整补强体系,胶料的硫化返原程度减轻,硫化胶的邵尔A型硬度、定伸应力和回弹值增大,拉伸强度、撕裂强度和损耗因子减小,压缩生热降低;成品轮胎的耐久性能提高。     

抗硫化返原剂在全钢载重子午线轮胎胎面胶中的应用试验

研究4种抗硫化返原剂在全钢载重子午线轮胎胎面胶中的应用。结果表明:添加多功能交联剂WY988胶料的硫黄用量减小,加工安全性能、抗硫化返原性能、物理性能和耐磨性能好,生热低,弹性模量(G′)大;添加抗硫化返原剂WK901,PK900和VIVA77胶料的抗硫化返原性能依次降低,G′依次减小;添加抗硫化返原剂对胶料滚动阻力影响不大。     

抗硫化返原剂在全钢载重子午线轮胎胎面胶中的应用

研究抗硫化返原剂WK901,WY988和KA9188在全钢载重子午线轮胎胎面胶中的应用。结果表明:在胎面胶中加入抗硫化返原剂WK901,胶料的抗硫化返原性能和耐老化性能最好;加入抗硫化返原剂WY988和KA9188,胶料的定伸应力、弹性和耐疲劳性能提高,生热和滚动阻力降低。     

抗硫化返原剂在全钢子午线轮胎粘合胶中的应用

研究抗硫化返原剂HT918和HTS在全钢子午线轮胎粘合胶中的应用。结果表明：加入抗硫化返原剂后胶料的门尼粘度减小,门尼焦烧时间延长,t90缩短,抗硫化返原性能明显提高,硫化胶的物理性能变化不大,过硫化后的性能保持率明显增大,粘合性能和动态力学性能提高;其中抗硫化返原剂HT918与HTS并用后胶料的抗硫化返原效果最好,抗硫化返原剂HTS胶料的粘合性能最好,抗硫化返原剂HT918胶料的动态力学性能最好;采用抗硫化返原剂HT918制造的成品轮胎的高速和耐久性能提高。     

工程机械子午线轮胎胎肩垫胶的配方优化

对工程机械子午线轮胎胎肩垫胶的配方进行优化。结果表明：通过调整胎肩垫胶配方中的补强体系和硫化体系,并增加抗硫化返原剂PK900和HTS,胶料的门尼焦烧时间延长,抗硫化返原性明显改善;硫化胶的综合物理性能和动态力学性能较好;成品轮胎的耐久性能提高。     

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.     

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.     

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。     

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.     

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.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.