异山梨醇型聚碳酸酯的制备方法及性能调控研究进展

以石油为基础原料的双酚A型聚碳酸酯(BPA-PC)因双酚A具有不可再生和雌激素效应等问题导致其在食品包装等领域的应用受到限制。近年来,寻求一种无毒无害、可替代双酚A制备聚碳酸酯的单体已成为业内的研究热点。异山梨醇(IS)作为生物基可再生单体、无毒无害,是目前最有希望代替双酚A合成聚碳酸酯的关键原料,用其合成的异山梨醇型聚碳酸酯(IS-PC)具有无毒及优异的光学性能、耐划伤性、热稳定性、生物降解性和生物相容性等,已在包装、汽车、电子电器、生物医学等领域显示出良好的应用前景。本文对异山梨醇型聚碳酸酯（IS-PC）的制备方法及性能调控进行了综述,详细对熔融酯交换法制备异山梨醇型聚碳酸酯（IS-PC）进行了阐述,重点对调控异山梨醇型聚碳酸酯（IS-PC）性能的方法进行了分类归纳,并对异山梨醇型聚碳酸酯的研究方向进行了展望。     

异山梨醇基聚碳酸酯的制备及共聚改性研究进展

介绍了异山梨醇基聚碳酸酯对聚碳行业发展的意义,综述了异山梨醇基聚碳酸酯的主要制备方法,包括端羟基活化法、光气法和熔融酯交换法。概述了研究较多的熔融酯交换法制备异山梨醇基聚碳酸酯催化剂的进展,包括固体碱催化剂和离子液体催化剂,其中离子液体催化剂被认为是目前最有发展前景的催化剂之一。最后,对异山梨醇基聚碳酸酯的共聚改性方法进行了总结,并对今后的研究方向作了展望。     

异山梨醇基聚碳酸酯的制备及共聚改性研究进展

介绍了异山梨醇基聚碳酸酯对聚碳行业发展的意义,综述了异山梨醇基聚碳酸酯的主要制备方法,包括端羟基活化法、光气法和熔融酯交换法。概述了研究较多的熔融酯交换法制备异山梨醇基聚碳酸酯催化剂的进展,包括固体碱催化剂和离子液体催化剂,其中离子液体催化剂被认为是目前最有发展前景的催化剂之一。最后,对异山梨醇基聚碳酸酯的共聚改性方法进行了总结,并对今后的研究方向作了展望。     

日本三菱化学研制生物基PC

<正>日本三菱化学公司近日宣称,已研制出一种生物基聚碳酸酯(PC)树脂。其开发的这种透明生物工程塑料DURABIO的共聚单体为异山梨醇,而非传统的双酚A。东京某原料巨头公司称,DURABIO不能生物降解,适用于一系列工程应用。与传统的PC树脂相比,DURABIO的主要优点为高透明性、优异的光学性能及高耐磨性。三菱化学称,DURABIO的光学性能和抗冲击性优于传统的PC树脂,其优异的光学性能得益于原料异山梨醇。与双     

聚碳酸酯光学零件用紫外光固化耐磨涂料研究

研究了聚碳酸酯光学零件紫外光固化耐磨涂料的配方,分别从低聚物、流平剂、溶剂等方面探讨了它们对涂膜性能的影响,制备了聚碳酸酯光学零件的紫外光固化耐磨涂料。     

偶氮聚碳酸酯的制备与性能研究

以对氨基苯甲酸、亚硝酸钠和苯酚为原料,通过重氮偶合反应合成了对羟基偶氮苯甲酸,并用红外光谱和核磁共振对所合成的对羟基偶氮苯甲酸的结构进行了表征。将羟基偶氮苯甲酸与聚碳酸酯进行熔融混合并进行酯交换反应,制备了偶氮聚碳酸酯。通过光学性能和力学性能研究发现,所制备的偶氮聚碳酸酯具有优异的光致变色性能和透明性,力学性能与聚碳酸酯相当。     

拜耳聚碳酸酯产能将超百万吨

拜耳公司日前宣布,目前世界上已有近1/3的光学存储介质来自于拜耳公司生产的聚碳酸酯材料。鉴于该领域巨大的市场潜力,拜耳公司决定提高聚碳酸酯生产能力,争取到2006年全球产量超过110万t。 拜耳公司是光盘级聚碳酸酯材料最主要生产商之一。在欧洲,聚碳酸酯是制造光学存储介质的首选材料,其优势远远领先于其它材料。     

光学级聚碳酸酯的应用及循环利用技术现状

简述光学级聚碳酸酯的生产消费现状、性能特点和主要用途,针对日益加重的"白色污染"和国家产业技术政策,着重阐述作为光盘使用的光学级聚碳酸酯在国内外的回收技术和循环利用技术,提出由回收的光学级聚碳酸酯制备聚合物纳米复合材料是光学级聚碳酸酯一种有潜力的循环应用技术。     

三菱瓦斯特种聚碳酸酯可替代光学玻璃

三菱瓦斯化学公司透露，即将投资建设特种聚碳酸酯树脂装置。这种新材料可用于替代光学透镜中的玻璃。此前，树脂的光学变形妨碍了其应用于高质量摄影机。特种聚碳酸酯树脂具有极低的双折射性，可避免引起光学变形。产品的高流动性还使其适用于带有摄影功能的手机和数字摄影机，以及运载工具摄影机和监视摄影机。     

PC基光散射材料的制备研究

将丙烯酸、有机硅光扩散等助剂混合后,经过平行双螺杆挤出机制备了光扩散聚碳酸酯,研究不同配比的丙烯酸和有机硅光扩散剂对聚碳酸酯光学性能的影响。结果表明:采用不同含量的丙烯酸和有机硅光扩散剂复配,添加不同的量可得到不同光学性能的光扩散聚碳酸酯。     

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.