1400dtex/2锦纶6加密帘布在9.00-20 16PR载重斜交轮胎中的应用

对1400dtex/2锦纶6加密帘布和1870dtex/2锦纶6帘布在9．00—2016PR载重斜交轮胎中的应用进行了对比试验。结果表明，采用1400dtex/2锦纶6加密帘布，通过调整轮胎外缘尺寸、缓冲层和胎圈等结构及混炼、帘布压延和胎面胶挤出等工艺条件，可使轮胎性能符合要求，并可降低生产成本。     

1870dtex/2锦纶66加密帘布在载重斜交轮胎中的应用

研究1870drex／2锦纶66加密帘布在载重斜交轮胎中的应用效果，并与1870dtex／2锦纶6加密帘布进行对比。结果表明，与锦纶6加密帘布相比，应用锦纶66加密帘布，可提高载重斜交轮胎的速度性能和强度性能，降低轮胎的退赔率，但其成本略有增加。     

高强力T4B轻型1760dtex/2锦纶66浸胶帘布在载重斜交轮胎中的应用

研究高强力T4B轻型1760dtex/2锦纶66浸胶帘布在载重斜交轮胎中的应用.结果表明,高强力T4B轻型1760dtex/2锦纶66浸胶帘布性能达到企业技术指标要求,以其替代1870dtex/2锦纶66浸胶帘布用于载重斜交轮胎生产,可在保证轮胎产品质量的前提下,降低生产成本.     

低纤型1790dtex／2锦纶66浸胶帘布在轻型载重斜交轮胎中的应用

对低纤型1790dtex／2锦纶66浸胶帘布在轻型载重斜交轮胎中的应用进行了研究。结果表明，低纤型1790dtex/2锦纶66浸胶帘布代替1870dtex／2锦纶66浸胶帘布使用，在保证轮胎质量的前提下，可以明显降低轮胎的生产成本。     

930dtex/2锦纶6浸胶帘布在轻型载重子午线轮胎胎圈包布中的应用

试验研究930dtex／2锦纶6浸胶帘布替代3780dtex／1×3780dtex／1锦纶66网眼布在7．00R1612PR轻型载重子午线轮胎胎圈包布中的应用效果。结果表明,930dtex／2锦纶6浸胶帘布的帘线结构简单、强力高、与橡胶结合好;替代3780dtex／1×3780dtex／1锦纶66网眼布用作7．00R1612PR轻型载重子午线轮胎胎圈包布,可以提高成品轮胎的胎圈耐久性能,同时降低生产成本。     

高强力T4B轻型1320dtex/3锦纶66浸胶帘布在工程机械斜交轮胎中的应用

介绍高强力T4B轻型1320dtex/3锦纶66浸胶帘布在工程机械斜交轮胎中的应用.试验结果表明,用高强力T4B轻型1320dtex/3锦纶66浸胶帘布替代普通1400dtex/3锦纶66浸胶帘布生产的轮胎主要性能均达到国家标准要求,并可降低生产成本.     

1400dtex/2 V3锦纶6浸胶帘布在农业轮胎中的应用

研究1400dtex/2 V3锦纶6浸胶帘布在农业轮胎中的应用.结果表明,以1400dtex/2 V3锦纶6浸胶帘布替代1870dtex/1-88145锦纶浸胶帘布用于农业轮胎胎体中,可以提高安全倍数,改善工艺性能,降低工人劳动强度,提高成品轮胎性能和经济效益.     

6．50-14 8PR轻型载重轮胎的设计

介绍出口6.50-14 8PR轻型载重轮胎的设计.外直径膨胀率取1.139,断面宽膨胀率取1.010,水平轴位置(H1/H2)取0.829 9.胎体帘布采用4层1400dtex/2V2锦纶6帘布,缓冲层采用1层930dtex/2V3锦纶6帘布,钢丝圈采用Φ1.0 mm的19#钢丝.胎面胶、胎侧胶、缓冲胶和胎体帘布层胶采用高补强、高填充配方,并调整胶料混炼工艺.成品性能试验结果表明,轮胎充气外缘尺寸、物理性能、强度、高速性能和耐久性能均符合设计要求.轮胎生产成本较低.     

1870dtex/1锦纶6帘布在小型农业轮胎中的应用

对1870dtex／1锦纶6帘布在小型农业轮胎中的应用进行了研究。通过适当调整轮胎结构和工艺条件，采用1870dtex／1锦纶6帘布替代1400dtex／2锦纶6帘布作骨架材料的小型农业轮胎各项性能均符合国家标准和企业内控标准要求，而且轮胎的质量略有减小。每条轮胎的原材料成本降低5％～10％。     

低纤型930dtex/2锦纶6浸胶帘布在中小型农业驱动轮胎中的应用

研究930dtex／2锦纶6浸胶帘布在中小型农业驱动轮胎中的应用。结果表明，中小型农业轮胎生产中采用930dtex／2V1锦纶6浸胶帘布替代1400dtex／2V2锦纶66浸胶帘布为骨架材料，相应调整结构参数和工艺条件，轮胎的各项性能均符合国家标准要求，且轮胎质量减小，成本降低。     

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。