聚氨酯/乙烯基酯树脂互穿聚合物网络结构与性能的研究

通过同步法制备了一系列聚氨酯／乙烯基酯树脂互穿聚合物（ＰＵ／ＶＥＲ－ＩＰＮ）,研究了ＰＵ／ＶＥＲＩＰＮ性能的影响因素。结果表明：随着ＰＵ含量的增加,ＩＰＮ的热稳定性能有一定程度的提高;而ＶＥＲ的含量增加,ＰＵ／ＶＥＲ－ＩＰＮ的剪切强度提高。实验还发现：当ＰＵ／ＶＥＲ－ＩＰＮ为部分相容的多相微区结构时,对增加ＩＰＮ的力学损耗更有利     

环氧—聚氨酯互穿聚合物网络导电涂料

研究了以环氧－聚氨酯互穿聚合物网络（ＥＰ－ＰＵＩＰＮ）为基料,镀银铜粉为导电填料的导电涂料。用扫描式电子显微镜（ＳＥＭ）观察了不同配比ＥＰ－ＰＵＩＰＮ的两相相容性,用差示扫描量热法（ＤＳＣ）测定了ＩＰＮ的玻璃化温度。讨论了ＥＰ－ＰＵＩＰＮ的结构及选择,镀银铜粉的粒度及含量对导电涂料的电阻率和使用性能的影响。试验表明,９０／１０ＥＰ－ＰＵＩＰＮ作为基料,镀银铜粉的含量为８０％、粒度为４００目,涂膜的电阻率低,使用性能好。     

IPN聚氨酯／不饱和聚酯RIM反应料的研究

本文利用自制绝热流变仪对ＲＩＭ ＩＰＮ ＰＵＲ／ＵＰＥ的绝热流变性进行了研究。通过差示扫描量热法（ＤＳＣ）探讨了ＰＵＲ／ＵＰＥ组成对ＩＰＮ ＰＵＲ／ＵＰＥ的混溶性的影响。ＩＰＮ ＰＵＲ／ＵＰＥ的弹性模量随ＵＰＥ的增加而增大。     

聚氨酯／乙炮基酯树脂互穿聚合物网络结构与性能的研究

通过同步法制备了一系列聚氨酯／乙烯基酯树脂互穿聚合物，研究了ＰＵ／ＶＥＲ－ＩＰＮ性能的影响因素。结果表明：随着ＰＵ含量的增加，ＩＰＮ的热稳定性能有一定程度的提高；而ＶＥＲ的含量增加，ＰＵ／ＶＥＲ－ＩＰＮ的剪切强度提高。实验还发现：当ＰＵ／ＶＥＲ－ＩＰＮ为部分相容的多相微区结构时，对增加ＩＰＮ的力学损耗更有利。     

聚氨酯／聚甲基丙烯酸甲酯／废胶粉共轭三组分互穿聚合物网络的研究

利用共轭三组分ＩＰＮ和界面共轭互穿新概念，制备了聚氨酯（ＰＵ）／聚甲基丙烯酸甲酯（ＰＭＭＡ）／废胶粉（ＳＲＰ）共轭三组分ＩＰＮ。其性能明显优于ＰＵ／ＳＲＰ体系。还通过ＴＥＭ，ＳＥＭ，ＤＳＣ，ＰＡＬ等手段对三组分体系进行了结构形态分析，发现作为公共网络的ＰＭＭＡ对性能改进具有重要的作用。     

聚碳酸酯型聚氨酯／环氧树脂互穿网络聚合物交联密度及？…

用同步法合成了聚碳酸酯型聚氨酯／环氧树脂互穿网络聚合物（ＰＣＰＵ／ＥＰＩＰＮ）。红外光谱分析表明两组分间存在一定程度的化学结合。动态力学性能分析表明：由于两网络间的互穿、缠结以及接枝反应的发生,使体系中ＰＣＰＵ和ＥＰ的相容性得到改善。用溶胀法测定了ＩＰＮ体系的交联密度,结果发现形成ＩＰＮ后体系的交联密度相应比纯组分有所提高。力学性能测试表明：在ｍ（ＰＣＰＵ）／ｍ（ＥＰ）＝２５／７５处ＩＰＮ体系的力     

聚氨酯／乙烯基酯树脂互穿聚合物网络的力学性能研究

研究了适用于反应注射成型的乙烯基酯树脂（ＶＥＲ）与聚氨酯（ＰＵ）形成互穿聚合物网络（ＩＰＶ）时，ＶＥＲ中的羟基与异氰酸酯的反应对材料力学性能的影响。实验结果表明，若异氰酸酯的化学计量忽略ＶＥＲ中的羟基，则对所合成的ＰＵ／ＶＥＲＩＰＮ而言，ＰＵ对ＶＥＲ的增韧效果较差；若异氰酸酯的用量考虑ＶＥＲ中的羟基含量，则用碳化二亚胺改性二苯基甲烷二异氰酸合成的ＰＵ／ＶＥＲ（组成比５０／５０）ＩＰＮ的拉伸或冲击强度分别比纯ｐｕ或纯ＶＥＲ网络要高得多，可获得兼具刚性与韧性的材料。在这类ＩＰＮ中添加少量聚醚接枝的ＶＥＲ，可有效地提高材料的拉伸强度。     

网络间的化学键效应对聚氨酯／乙烯基酯树脂IPN形态与力学性能的影响

本文通过环氧树脂（Ｅ—５１）与甲基丙烯酸合成了大分子链中含有羟基或羟基被封闭的乙烯基酯树脂（分别称为ＶＥＲＨ与ＶＥＲＡ），并用它们与聚氨酯（ＰＵ）合成了不同组成的ＰＵ／ＶＥＲ互穿网络（ＩＰＮ），用扫描电子显微镜考察了这些ＩＰＮ材料的形态，发现网络间的化学键对ＩＰＮ的形态有很大影响，它们抑制了两个网络间的分相以及ＰＵ硬段局部有序结构的形成。对这些材料的力学性能进行了测定，结果表明网络间的化学键能较大幅度地提高材料的力学性能。     

聚酯型聚氨酯／聚苯乙烯／胶粉共轭三组分互穿聚合物网络的研究

利用互穿聚合物网络（ＩＰＮ）和半凝胶法技术,合成了聚氨酯／聚苯乙烯／胶粉共轭三组分ＩＰＮ,并通过ＤＳＣ和ＴＥＭ等方法对该体系的结构与性能进行了初步研究。结果表明：当ＮＣＯ／ＯＨ当量比为２．８、ＰＵ／ＰＳ质量比为６０／４０时,该共轭三组分ＩＰＮ体系力学性能最佳。ＤＳＣ和ＴＥＭ则证明在该体系中,作为公共网络的ＰＳ有助于ＰＵ与ＳＲＰ的界面结合。     

聚氨酯/聚苯乙烯互穿网络聚合物的性能特征讨论

介绍了具有网络交联键的互穿网络聚合物（ＩＰＮ）及其合成与表征方法，讨论了聚氨酯（ＰＵ）与聚苯乙烯（ＰＳ）合成的ＩＰＮ的性能特征。结果表明，具有网络交联键的ＩＰＮ力学性能、动态力学性能都随交联密度的增大而改善，而其透气性和热解性能则随交联密度的增大而下降     

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.