空心玻璃微珠填充改性双马来酰胺树脂复合材料耐热性能的研究

采用空心玻璃微珠填充改性双马来酰胺树脂(BMI),研究了玻璃微珠用量、粒径及表面处理对材料性能的影响,并用热机械分析仪(TMA)测定了材料的线膨胀系数。结果表明:随着玻璃微珠质量分数的增加,马丁耐热温度提高,线膨胀系数呈降低的趋势,小粒径(10μm)和经过表面处理的玻璃微珠对马丁耐热温度改性的效果更加显著。     

空心玻璃微珠填充改性双马来酰胺树脂复合材料耐热性能的研究

采用空心玻璃微珠填充改性双马来酰胺树脂（BMI），研究了玻璃微珠用量，粒径及表面处理对材料性能的影响，并用热机械分析仪（TMA）测定了材料的线膨胀系数。结果表明随着玻璃微珠质量份数的增加马丁耐热温度提高，线膨胀系数呈降低的趋势，小粒径（10μm）和经过表面处理的玻璃微珠对马丁耐热温度改性的效果更加显著。     

空心玻璃微珠填充改性双马来酰胺树脂复合材料耐热性能的研究

采用空心玻璃微珠填充改性双马来酰胺树脂（BMI），研究了玻璃微珠用量，粒径及表面处理对材料性能的影响，并用热机械分析仪（TMA）测定了材料的线膨胀系数。结果表明随着玻璃微珠质量份数的增加马丁耐热温度提高，线膨胀系数呈降低的趋势，小粒径（10μm）和经过表面处理的玻璃微珠对马丁耐热温度改性的效果更加显著。     

空心玻璃微珠填充改性双马来酰胺树脂复合材料耐热性能的研究

采用空心玻璃微珠填充改性双马来酰胺树脂,研究了玻璃微珠用量、粒径及表面处理对材料性能的影响,并用热机械分析仪,(TMA)测定了材料的线膨胀系数。结果表明随着玻璃微珠质量份数增加,马丁耐热温度提高,线膨胀系数呈降低的趋势,小粒径和经过表面处理的玻璃微珠对马丁耐热温度改性的效果更加显著。     

空心玻璃微珠填充MC尼龙复合材料的研究

对空心玻璃微珠填充铸型(MC)尼龙进行了系列研究,考察了空心玻璃微珠含量、粒径及表面处理对MC尼龙性能的影响。结果表明,空心玻璃微珠改性MC尼龙复合材料的物理性能和力学性能优良,当加入10％表面处理的空心玻璃微珠时,制品的收缩率下降,热变形温度提高20℃以上,制品具有填料分布均匀、外观光泽优良等优点。与未处理的空心玻璃微珠相比,填充经表面处理空心玻璃微珠的复合材料拉伸强度、弯曲强度、断裂伸长率分别提高了15．7％、12．2％和246％。空心玻璃微珠的粒径愈小,复合材料的力学性能愈好。一定用量的玻璃微珠填充MC尼龙不仅可以使材料保持较好的力学性能和耐热性能,而且能够降低MC尼龙复合材料的成本。     

空心玻璃微珠表面改性对双马来酰亚胺树脂性能的影响

介绍了用硅烷偶联剂(KH-550)与钛酸酯偶联剂处理空心玻璃微珠的方法；研究了处理剂用量与玻璃微珠加入量对改性双马来酰亚胺树脂压缩强度及马丁耐热温度的影响。结果表明,KH-550和钛酸酯偶联剂质量分数分别为1%、0．8%时,其偶联改性的效果最好。随着玻璃微珠质量分数的增加,体系压缩强度呈降低的趋势,马丁耐热温度提高,其中KH-550偶联改性的效果优于经钛酸酯偶联剂改性的效果。     

空心玻璃微珠改性环氧树脂印刷电路板基材

对用于印刷电路板的环氧树脂／空心玻璃微珠复合体系的热性能、力学性能、亚微观形态和吸水性进行了系统的研究。实验表明：用空心玻璃微珠填充环氧树脂可提高后者的热性能和力学性能，尤其加入较小粒径的玻璃微珠，环氧树脂体系的Tg最高可提高5℃；用偶联剂对玻璃微珠表面进行处理，并向体系内加入表面活性剂可获得最佳效果；少量地加入玻璃微珠可降低环氧树脂的吸水性，但随着玻璃微球含量的增大体系的吸水性会随之增加。加入表面活性剂后，体系保持低吸水率。     

玻璃微珠填充PP复合材料力学性能与熔融结晶的研究

研究了玻璃微珠填充聚丙烯(PP)中玻璃微珠含量及粒径大小对复合材料力学性能和熔融、结晶行为的影响。结果表明:填充体系随着玻璃微珠含量增加,拉伸强度增加,冲击强度降低。在相同条件下,小粒径微珠填充体系拉伸强度和冲击强度均高于大粒径微珠填充体系。玻璃微珠在PP中具有成核作用,PP以异相成核方式结晶,提高了PP的结晶温度,结晶速率增大,流动性先增加后降低。     

玻璃微珠改性热塑性聚酰亚胺研究

采用玻璃微珠改性热塑性聚酰亚胺（PI—T）,考察了玻璃微珠粒径和用量对PI—T力学性能的影响,并用热机械分析仪（TMA）测定了改性PI—T的线胀系数。结果表明,改性PI—T的弯曲和拉伸弹性模量显著提高;线胀系数随玻璃微珠质量分数的增加呈降低趋势;玻璃微珠和PI—T基体的结合较差;改性PI—T的拉伸强度和冲击强度都有不同程度的降低;小粒径（5μm）较大粒径（20μm）玻璃微珠改性PI—T的冲击强度降低缓慢。     

超细玻璃微珠在HDPE双壁波纹管中的应用研究

对超细玻璃微珠进行有机化处理,再与高密度聚乙烯(HDPE)进行共混制得大口径双壁波纹管,并对其性能进行了测试分析。结果表明,以有机改性超细玻璃微珠为HDPE双壁波纹管的填充改性剂,能有效提高其落锤冲击强度和环刚度,且超细玻璃微珠粒径在3μm左右、用量约为20质量份时效果最佳;与普通轻质CaCO3填充制品相比,超细玻璃微珠填充HDPE双壁波纹管的蠕变率更低,"米重"更轻。     

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.