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1.
苯乙烯系阻燃塑料合金的研究进展   总被引:4,自引:0,他引:4  
综述了国内外近年来在苯乙烯系阻燃塑料合金方面的研究进展。主要介绍了高聚物型卤系阻燃剂、磷系阻燃剂、有机硅系阻燃剂等阻燃剂的特性及其在提高苯乙烯系塑料合金阻燃性能方面的应用,这些阻燃剂对环境友好,不仅能显著提高塑料基材的阻燃性能,而且力学性能和加工性能也得到改善。此外,还简要介绍了纳米复合技术在提高苯乙烯系塑料阻燃性能中的应用。  相似文献   

2.
苯乙烯系阻燃塑料合金的研究进展   总被引:3,自引:0,他引:3  
李永华  曾幸荣 《化工进展》2002,21(11):809-813
综述了国内外近年来在苯乙烯系阻燃塑料合金方面的研究进展。主要介绍了高聚物型卤系阻燃剂、磷系阻燃剂、有机硅系阻燃剂的特性及其在提高苯乙烯系塑料合金阻燃性能方面的应用。与目前常用的低分子卤系阻燃剂相比,这些阻燃剂对环境污染小,对塑料基材的机械性能和加工性能损害程度少。此外,还简要介绍了纳米复合技术在提高苯乙烯系塑料阻燃性能中的应用。  相似文献   

3.
曾伟立 《中国塑料》2011,25(7):6-10
综述了聚丙烯用阻燃剂的3种阻燃作用机理,包括气相阻燃、凝聚相阻燃、中断热交换阻燃机理。重点介绍了聚丙烯用阻燃剂的研究开发进展,包括水合金属化合物阻燃剂、磷系阻燃剂、膨胀型阻燃剂、硅系阻燃剂、纳米阻燃剂等。最后,指出纳米无机阻燃剂、膨胀型阻燃剂以及具有高效阻燃、低烟、无毒的复配阻燃剂是聚丙烯用阻燃剂未来的发展趋势。  相似文献   

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硅系阻燃剂研究进展   总被引:29,自引:0,他引:29  
贾修伟  刘治国 《化工进展》2003,22(8):818-822
从添加型硅系阻燃剂、含硅本质阻燃高聚物、聚合物/层状硅酸盐纳米复合阻燃材料等方面,阐述了硅系阻燃剂近几年的发展情况;介绍了有机硅系阻燃剂、无机硅系阻燃剂;评述了硅系阻燃剂具有高效、低毒、抑烟和促进成炭等优点;综述了含硅基团共聚物、含硅接枝共聚物及聚合物/层状硅酸盐纳米复合材料的结构和阻燃性能。  相似文献   

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概述了聚丙烯阻燃剂的作用机理,介绍了水合金属化合物、磷系阻燃剂、膨胀型阻燃剂等在聚丙烯(PP)阻燃应用中的研究进展。采用表面改性及微细化等措施对水合金属化合物和磷系阻燃剂进行改性,可以克服常规无机阻燃剂添加量大、对制品加工性能和物理性能有较大影响的不足。膨胀型阻燃剂、复合阻燃剂、多功能阻燃协效剂都是今后值得关注的方向。  相似文献   

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阻燃聚丙烯的研制   总被引:4,自引:0,他引:4  
通过系统研究聚丙烯阻燃体系,确定了阻燃聚丙烯最佳配方。采用具有协同效应复合阻燃剂体系和粉末聚丙烯,使阻燃聚丙烯具有稳定的阻燃性能和与纯聚丙烯接近的机械性能。据此制得的阻燃聚丙烯用于汽车电器上效果良好。  相似文献   

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简述了不饱和聚酯树脂的结构特点及阻燃性能较差的原因。综述了近年来不饱和聚酯树脂所用的阻燃剂及阻燃改性方法,包括卤系阻燃剂、氮系阻燃剂、磷系阻燃剂、硅系阻燃剂及其它氢氧化物、纳米粒子和天然矿物等无机阻燃剂,分析了各类阻燃剂的特点及阻燃机理。提出对添加型阻燃剂表面改性来增加其在不饱和聚酯树脂中的相容性和分散性,引入阻燃元素或阻燃基团来提高反应型阻燃剂的阻燃性能,以及比较不同阻燃剂的优缺点实现高效协同阻燃的效果。  相似文献   

8.
郭文鹤  杨斌  苗继斌  夏茹  钱家盛  王兴 《广东化工》2013,40(3):58-59,88
木塑复合材料是由热塑性塑料与木质纤维复合制备而成的新型环保材料。文章综述了木塑复合材料的燃烧特性及阻燃机理,总结了铝-镁系阻燃剂、磷系阻燃剂、膨胀型阻燃剂及纳米阻燃体系等无卤阻燃剂对木塑复合材料阻燃性能的影响,并对木塑复合材料阻燃改性研究进行了展望。  相似文献   

9.
综述了近年来有关硅系阻燃剂的结构与性能以及阻燃改性等方面的研究进展。介绍了无机硅系阻燃剂 (包括聚合物/层状硅酸盐以及聚合物/二氧化硅纳米复合材料)的热稳定性和阻燃性能。侧重论述了有机硅系阻燃剂(包括本质阻燃聚合物、笼状倍半硅氧烷及其改性聚合物)的热稳定性、阻燃性能和阻燃机理。  相似文献   

10.
周健 《塑胶工业》2006,9(6):21-23
采用几种不同类型的无卤阻燃剂研制环保型阻燃聚丙烯(PP),讨论各阻燃剂的阻燃机理,对研制的阻燃PP进行了阻燃性能测试和燃烧热测试。结果表明,Mg(OH)2复合阻燃体系和氨磷复合阻燃体系对PP均有良好的阻燃效果;研制的Mg(OH)2复合阻燃PP具有良好的阻燃性能和力学性能,并具有实际应用价值。  相似文献   

11.
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.  相似文献   

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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.  相似文献   

16.
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。  相似文献   

17.
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.  相似文献   

18.
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.  相似文献   

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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.  相似文献   

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