超低温耐油橡胶材料获成功

青岛颐科橡塑有限公司日前成功研制出了一种超低温（-55℃）耐油胶料（P3751—2）。据了解，该胶料为丁腈橡胶特种改性材料，其-55℃压缩耐寒系数为o．42，脆性温度为-73℃，超低温弹性十分优异，适用于8000米以上航空航天器液压及航油环境下的动态密封，可完全替代航空45713胶料，其骨架复合件和低摩擦材料复合密封件已成功用于某型设备。     

防老剂

据R．T．、Vanderbilt公司报道，VanoxL(一种聚合受阻苯酚)是一种活性非常高，具有非污染性和不褪色性，持续时间长的抗氧化剂，特别适用于SBR和IR橡胶胶料的防护。据说，VanoxL有效地改善了不同类型弹性体轮胎胶料的耐热性。100℃和121℃下热老化后的物理性能保持率说明了抗氧化剂的性能。     

橡胶胶料

橡胶胶料据Ｕ．Ｓ专利５３０２６３６报道，一种用于防滑轮胎胎面的胶料，其组成为：一种硫黄硫化的溶聚丁苯橡胶，其中混有含量在１８％的一种皮革粉末（粒径达３００μｍ）；一种炭黑。上述胶料当在一１５℃和２３℃下、接ＡＳＴＭＤ２２２８被测定时，具有４～６的硬度...     

GMA原位改性炭黑对EPDM胶料性能的影响

探讨甲基丙烯酸缩水甘油酯(GMA)原位改性炭黑对EPDM胶料硫化特性和硫化胶性能的影响。结果表明，GMA起连接炭黑与橡胶的作用．对胶料的硫化特性影响显．提高了硫化胶的物理性能、粘合性能和常温(30～60℃)下的减震阻尼性能；GMA用量为5份时，EPDM胶料的硫化速度较快，硫化胶的表观交联密度较大，物理性能和粘合性能较好。     

雪地靴胶面的研制

介绍雪地靴胶面的配方设计、炼胶工艺和出型工艺。胶料主体材料为NR、SBR和高苯乙烯树脂，硫化体系为硫黄与促进剂DM／M／D并用，补强填充体系为白炭黑、RX-80树脂、轻质碳酸钙和超细碳酸钙配合使用；胶料的t10为4．5min，t90为14min，塑炼胶塑性值为0．45～0．48，密炼时间为5～6min，挤出机头部温度为70～80℃、颈部温度为60℃、机身温度为45℃、螺杆温度为30℃，压延机上辊温度为85℃、下辊温度为55℃，以此条件生产的雪地靴胶面性能符合指标要求。     

耐寒丁腈橡胶密封制品配方的研究

研究了丁腈橡胶的低温耐寒性能，设计出了具有优良耐寒性能的生产配方。胶料的脆性温度可以达到-61℃以下，压缩耐寒系数在-40℃和-50℃下分别达到了0．69和0．61，达到了产品的技术要求。     

EPDM/CIR防腐蚀衬里的研究

对ＥＰＤＭ／氯化丁基橡胶防腐蚀衬里胶料研究表明，ＥＰＤＭ／ＣⅡＲ防腐蚀衬里胶料具有优异的耐ＴＰ℃次氯酸钠溶液，１０５－１２０℃硫酸溶液，１００℃磷酸溶液腐蚀性能，胶料工艺性能好，压延胶处挺性好，收缩率小，表面光滑和平整。     

丁腈橡胶胶料

日本专利JP 2006 16 523介绍的这种胶料包括PTMG双酯类（其数均分子量Mn为200～650）和C6-12线型或支链脂肪酸（用作增塑剂）。例如，一种牌号为Nipol 1042的胶料配方包括1份硫黄（S）和20份PTMG（其Mn为250）双（正辛酯）（Ⅰ）。这种配方的胶料经过硫化加工成试片后，其耐寒性为-42℃，在120℃下放置144h后体积变化为1．8％。在40℃下放置1周后，未见Ⅰ渗出。     

用于气囊罩的热塑性弹性体胶料

本专利介绍的这种胶料含有5％～40％的氢化嵌段共聚物(根据JIS K 6253标准，其弹簧硬度≤99，数均分子量Mn≥70，000)、二元乙丙共聚物(采用多段催化聚合工艺制备而成)和0．1％～10％的硅油(根据JIS Z 8803标准，25℃时其粘度≥50，000 cS)。其中，氢化嵌段     

耐高温潜油电缆EPDM绝缘层胶料配方的研究

介绍耐高温潜油电缆EPDM绝缘层胶料配方的研究。结果表明，采用主体材料为牌号JSR EP33的EPDM(第三单体亚乙基降冰片烯质量分数为0．4～0．6．丙烯质量分数为0．4～0．5)、硫化体系为硫化剂DCP／甲基丙烯酸锌并用体系、防护体系为防老剂NAPM／RD／石蜡并用体系、增塑剂为SUNPAR2280的配合，绝缘层胶料的性能较好；采用两次高温硫化工艺制备的成品电缆长期使用温度为180℃，冲击使用温度为190℃．最高使用温度为200℃。     

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。