远红外聚酯的研制

分析了远红外聚酯的国内外研制现状 ,指出当今国内远红外聚酯生产过程中普遍存在陶瓷粉对聚酯的相容性差、分散性差、远红外聚酯的过滤性能和流变性能差等问题。通过对陶瓷粉进行表面处理和降低聚酯熔点等途径 ,可明显改善远红外聚酯的可纺性。     

纳米远红外聚酯的研制

对远红外剂的研磨分散性和用量对远红外聚酯的切片性能、远红外发射性能、保温性能的影响进行了研究,同时对远红外聚酯的保健性能和毒性也进行了分析。用该聚酯切片纺丝、织布,效果性能良好。研究表明:添加3%的纳米级远红外剂可以制得具有远红外发射功能的聚酯,其布远红外法向比辐射率中达85%以上。     

中国专利

远红外陶瓷聚酯的制备方法 以对苯二甲酸二甲酯和乙二醇为原料,在发生酯交换的反应过程中,随着酯交换催化剂一同将经过预处理的陶瓷粉乙二醇料浆加入到系统中去,然后经过缩聚反应,直接生产出远红外陶瓷聚酯。所制备的聚酯含陶瓷粉     

石墨烯负离子改性聚酯纤维的制备及性能

采用圣泉集团生产的生物质石墨烯聚酯母粒为原料,通过与负离子聚酯母粒进行共混熔融纺丝,制备了石墨烯负离子改性聚酯纤维,并对其力学性能、抑菌性能、远红外性能及负离子释放量进行测试。结果表明:石墨烯负离子改性聚酯纤维的断裂强度为3.5 cN/dtex,断裂伸长率为19.9%,沸水收缩率为8.7%,能够满足织造要求;对金黄色葡萄球菌、白念珠菌的抑菌率为98%,对大肠埃希菌的抑菌率为96%,抑菌效果显著;远红外辐射温升为2.0℃,远红外发射率为0.89,远红外功能优异;负离子释放量达到了6 010个/cm~3,具有明显的负离子保健功能且效果稳定持久。     

聚酯固相缩聚技术进展

简略地介绍了聚酯固相缩聚的起源、演变和发展趋势,剖析各种聚酯团相聚合设备的优点和弊端,着重介绍了美国H—Bepex公司第三代结晶器——串联Disc盘状结晶器和第四代结晶器——远红外结晶器,这种远红外结晶器既能有效地避免切片的粘结又能有效地抑制粉尘的产生。并就氮气净化技术对目前国际上采用的种种方法进行了简明扼要的比较。     

远红外PET的制备及其性能研究

以对苯二甲酸、乙二醇为主要原料,在酯化反应后,缩聚反应前添加远红外粉末改性剂,间歇式聚合合成远红外聚酯(PET)切片,并对其性能进行了研究。结果表明:合成分散剂对远红外粉末的研磨效果较好,小于1μm的粒子占92％,远红外剂对PET切片的主要性能没有影响;远红外PET切片具有良好的可纺性和拉伸性;远红外PET纤维的物理性能和后加工性能良好;相对PTA的远红外剂质量分数为3．0％的PET纤维具有85％的法向比辐射率,其切片在37℃时的温升达2．2℃。     

聚酯树脂及其涂料

具有高反射系数的涂料组合物；耐侯性、耐化学品性和膜硬度好的钢涂料用聚酯树脂；具有深冲压性的远红外外辐射涂料组合物及其涂覆的钢板；具有优异远红外辐射性和低光泽的预涂金属板及涂覆该涂料的钢板；聚酯多元醇组合物及含该组合物的涂料     

北京市化工局抓十项节能重点

北京市化工局是耗能大户,一方面感到能源供应紧张,但另一方面也存在着许多明显的浪费现象,所以必须抓紧节约能源的具体技术措施。该局瞄准十个方面,发动群众扫浮财。其十个节能重点的事例是: 1.推广应用远红外技术北京市化工研究院实验厂在聚酯生产中,将远红外加热技术应用于液相加热,节电30%。     

保暖发热聚酯纤维的开发

将电气石母粒添加到聚酯中,纺制成中空形聚酯预取向丝,再经假捻变形加工使其具有三维卷曲形态,开发出保暖发热聚酯纤维。假捻变形时第一热箱温度控制在180~190℃,纤维断裂强度为3.2 c N/dtex,卷曲收缩率为24%。经测试表明:该纤维的远红外法向发射率为88%,温升为2.9℃,中空形状保持完好。     

远红外幅射陶瓷研究的现状及进展

介绍了远红外辐射加热的机理，阐述了远红外辐射陶瓷研究的现状和进展，提出了远红外技术今后的研究重点应放在远红外辐射陶瓷材料的研发上。     

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。