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TAS 系列光亮润滑剂是吴县市国光化学助剂有限公司研制的新型高效润滑剂系列,目前已有 TAS—1、TAS—1A、TAS—2、TAS—2A、TAS—3B、TAS—4A、TAS—4B 等多个产     

改性EBS类润滑剂在塑料母粒制造中的应用研究

在分析了新型改性EBS类塑料润滑剂TAS -2A(商品名 )分子结构的基础上 ,提出了该润滑剂在几种塑料母粒制造中的应用情况 ,研究了该润滑剂在制造ABS色母粒、PP阻燃母料、PE珠光母粒及PE黑母粒等的应用效果。结果表明 :TAS -2A润滑剂在塑料母粒制造中有良好的润滑性和加工性 ,并使塑料制品有更高的光泽性。     

对比两种润滑剂TAS-2A和EBS在高密度聚乙烯中的应用

在高密度聚乙烯(HDPE)成型加工中加入两种润滑剂TAS-2A及EBS,经挤出、注射制备样条,并对比两种润滑剂对HDPE性能的影响。结果表明,两种润滑剂均能提高体系的熔融指数,改变表面状态;润滑剂TAS-2A对样品塑化时间和平衡扭矩有较明显的降低作用,冲击强度、拉伸强度也呈小幅下降;其中TAS-2A对HDPE的润滑效果更为显著。     

新型光亮润滑剂TAS在塑料加工中的应用

由于脂肪酸酰胺具有独特的化学结构,优异的加工性能,因此在塑料加工行业中作为润滑剂已被广泛应用。在国外,该系列产品产量约占全部润滑剂总量的 25％以上,而在我国发展很慢。品种较少,产品产量所占据的比例远远低于国外。 我公司生产的 TAS系列润滑剂是乙撑双脂肪酸酰胺的衍生物,以及以它们为主的     

汽车用弹性体

用于汽车市场的弹性体具有优异的拉伸强度,较高的耐润滑剂性能。Dubbed Zeptol弹性体是一种氢化丁腈橡胶,其使用温度范围为-35～150℃。该产品适用于空调系统和同步计时系统。据供应商称,该类     

几种润滑剂性能比较及其对ABS熔融加工的影响

对ABS常用的四种润滑剂进行了研究,对其红外光谱、转矩流变性能、熔点和耐热性能进行了对比分析。结果表明:EBS和YY-502A的极性较强,对ABS具有良好的内润滑性能,可用于ABS改性塑料和色母粒的分散和润滑;YY-502A具有双熔点特点,比单一熔点EBS具有更好的颜料分散和预处理功能,克服了低熔点润滑剂在加工初期出现润滑过度的问题;YY-502A的耐热性能优于EBS和YY-5502,是一种稳定性好、综合性能优异的ABS加工改性润滑剂。     

冰醋酸改性EBS润滑剂性能的研究

采用冰醋酸对乙撑双硬脂酰胺(EBS)润滑剂进行改性,生产出一种新型润滑剂EBC。与EBS相比,EBC润滑剂分子链中减少了了N—H键,并引入了新的弱极性基团—CO—CH_3,增大了分子的极性,避免了分子间氢键的形成,使熔点降低,黏度减小,分散性增强。研究发现:高密度聚乙烯(HDPE)中加入EBC润滑剂后,熔体流动速率大幅提高,平衡扭矩明显下降。当EBC润滑剂加入量为1 phr时,塑化时间最短,拉伸强度最高,综合性能最好。     

环保型树脂改性剂

据“プラスチックスエ -ジ ,1999,4 5 ( 2 ) :6 9”报道 ,日本三洋化成工业公司开发成功可将PP、木屑、稻壳整体成型的树脂改性剂CA6 0。该制品是在该公司树脂改性剂技术的基础上加上了脱水剂 ,可提高含有水分的有机填料在PP中的分散性。例如将PP和木屑等按 1∶1的比例混合 ,其成型性及加工性优异 ,可制成强度和弹性优异、外观美丽的合成树脂板 (胶合板状 ) ,用于家具、床等建筑内装饰材料及汽车内饰件等。另外 ,因木屑、稻壳等废物得到了有效利用 ,其制品又可回收再生利用 ,有利于环境保护。环保型树脂改性剂…     

极性润滑剂对滑石粉填充PP性能的影响

以滑石粉(Talc)填充聚丙烯(PP)为研究对象,引入了两种不同结构的酰胺类极性润滑剂,其结构分别为AB (A代表极性锚固基团;B代表长支链或直链烷烃)型和BAB型,考察了两者对PP/Talc复合材料力学性能和流变行为的影响,同时借助仪器化冲击,着重研究了极性润滑剂对材料冲击过程中裂纹产生功和裂纹扩展功的影响。结果表明,润滑剂的引入对流变行为影响较小,随着润滑剂添加量的增加,复合材料的熔体流动速率有所提高,加工性能改善,弯曲弹性模量和断裂伸长率有小幅度升高。BAB型润滑剂对PP/Talc复合材料具有更优异的增韧作用,实验范围内低温(0℃)缺口冲击强度最高提高了35%,冲击韧性提升主要得益于裂纹扩展功的增加。此外,扫描电子显微镜结果显示,BAB润滑剂的引入有利于改善Talc在PP基体中的分散均匀性,从而提高复合材料的冲击韧性。     

相容剂改性短切玻纤增强聚苯硫醚复合材料性能研究

以马来酸酐接枝氢化苯乙烯-丁二烯嵌段共聚物(SEBS-g-MA)和甲基丙烯酸缩水甘油酯接枝聚烯烃弹性体(POE-g-GMA)为相容剂,以硅酮粉为润滑剂,研究了两种相容剂及其含量对短切玻纤增强聚苯硫醚复合材料性能的影响。研究发现,相容剂与润滑剂协同使用,不但增强了复合材料强度和韧性,且改善了玻纤分散性,解决了复合材料表面毛刺和光泽度差的问题,并且POE-g-GMA对材料强度和韧性提升优于SEBS-g-MA。     

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。