控制铁相组成生产用于道路的普通硅酸盐水泥

硅酸盐水泥熟料的铁相，是Ｃ２Ｆ－Ｃ６ＡＦ２－Ｃ４ＡＦ－Ｃ６Ａ２Ｆ连续固溶体。一般煅烧条件下，其铁相主要为Ｃ４ＡＦ。引入一定量的含矿化离子的工业废渣配料，可以增加Ａｌ２Ｏ３在铁相中的固溶量，从而可得到以Ｃ４ＡＦ－Ｃ６Ａ２Ｆ为主的铁相，其摩尔比大体ａＯ：Ａｌ２Ｏ３：Ｆｅ２ｏ３＝５：１．５：１。这种熟料及其磨制的普通硅酸盐水泥，具有良好的耐磨性及很小的干缩率。     

Fe2O3对阿利特—硫铝酸盐水泥性能影响的初步研究

文章探讨了Ｆｅ２Ｏ３对阿利特－硫铝酸盐水泥熟料矿物形成及性能的影响,结果表明,适量的Ｆｅ２Ｏ３Ｓ可改善生料的易烧性,促进ｆ－ＣａＯ的吸收,促进Ｃ３Ｓ及Ｃ４Ａ３Ｓ两种主要矿物的形成并提高水泥的强度;当Ｆｅ２Ｏ３含量较高时,则不利于Ｃ３Ｓ与Ｃ４Ａ３Ｓ的形成且使水泥的强度降低,凝结时间延长。     

铝酸盐矿物对氯氧镁水泥的影响

本讨论了铝酸盐矿物对氯氧镁水泥的水化产物、耐水性和强度的影响。通过ＸＲＤ相分析，证明了具有水化活性的铝酸盐矿物（如ＣＡ，Ｃ４ＡＦ等）对氯氧镁水泥的水化相有影响；而没有水化活性的铝酸盐矿物（如Ｃ２ＡＳ）对氯氧镁水泥的水化相没有影响。当氯氧镁水泥中ＭｇＯ／ＭｇＣｌ２摩尔比大于５时，含有ＣＡ或Ｃ４ＡＦ的净浆硬化体中主要水化相是３·１·８相，而不含ＣＡ或Ｃ４ＡＦ或含Ｃ２ＡＳ的净浆硬化体中主要水化相是５·     

P2O5对阿利特—硫铝酸水泥熟产矿物形成及性能的影响

探讨了Ｐ２Ｏ５对阿特利－硫铝酸盐水泥熟料烧成，矿物形成及水泥性能的影响。结果表明，少量Ｐ２Ｏ５能改善生料的易烧性，降低烧成温度，但影响熟料矿物形成，使水泥３ｄ强度降低而７ｄ，２８ｄ强度增进较大；当Ｐ２Ｏ５大于０．５％，主要矿物Ｃ４Ａ３Ｓ和Ｃ３Ｓ的形成量明显减少，ｆＣａＯ升高，水泥各龄期强度均明显降低，凝结时间延长。     

用量子化学方法计算3CaO.3Al2O3.SrSO4的水化活性

用新发展起来的计算量子化学－电荷自洽离散变分Ｘα方法（ＳＣＣ－ＤＶ－Ｘα）对水泥矿物３ＣａＯ．３Ａｌ２Ｏ３．ＳｒＳＯ４和３ＣａＯ．３Ａｌ２Ｏ３．ＣａＳＯ４进行了研究。通过分子轨道能级、键级及原子净电荷等信息的分析结果表明：在这两个矿物中Ｃａ，Ｓｒ原子对水化活性的贡献比Ａｌ重要。     

C11A7.CaCl2和3C2S.3CaSO4.CaF2的水化性能研究

本文合成了Ｃ１１Ａ７．ＣａＣｌ２和３Ｃ２Ｓ．３ＣａＳＯ４．ＣａＦ２二种矿物，借助于ＸＲＤ、ＴＧ－ＤＴＡ等测试手段，研究了这两种矿物及其以１：１掺合时的水化历程。结果表明，矿物３Ｃ２Ｓ。３ＣａＳＯ４．ＣａＦ２的水化能力很弱，但与Ｃ１１Ａ７．ＣａＣｌ２复合时，其水化活性可以大大地得激发。     

C11A7.CaCl2和3C2S.3CaSO4.CaF2的水化性能研究

合成了Ｃ１１Ａ７．ＣａＣｌ２和３Ｃ２Ｓ．３ＣａＳＯ４．ＣａＦ２两种矿物，借助ＸＲＤ，ＳＥＭ等测试手段，研究了这二种矿物及其以１：１掺合时的水化历程，结果表明，矿物３Ｃ２Ｓ．３ＣａＳＯ４．ＣａＦ２水化能力较弱，但与Ｃ１１Ａ７．ＣａＣｌ２共掺时，其水化活性可以大大地得到激发。     

渣的组成与水泥抗侵蚀的试验研究

对ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２系统玻璃质的渣和ＳｉＯ２、Ａ３Ｓ２、Ｃ３Ｓ２、ＣＡＳ２和Ｃ２ＡＳ组成的玻璃质材料作混合材的水泥受侵蚀浆体进行了物理、化学试验；Ｘ射线衍射、扫描电镜及能谱、孔结构等测试，表明混合材的组成不同，则水泥的抗侵蚀性能相差甚大，而ＳｉＯ２、Ａ３Ｓ２、Ｃ３Ｓ２、ＣＡＳ２和Ｃ２ＡＳ组成的玻璃质材料的水泥抗侵蚀性能也完全不同。并探讨了这类渣的水泥受侵蚀破坏机理。     

CaO-SiO_2-CaSO_4-CaF_2-Al_2O_3系统中3C_2S·3CaSO_4·CaF_2的形成动力学

３Ｃ＿２Ｓ·３ＣａＳＯ＿４·ＣａＦ＿２是水泥熟料烧成中应用ＣａＳＯ＿４和ＣａＦ＿２作为复合矿化剂时重要的中间化合物。探讨了Ａｌ＿２Ｏ＿３存在时３Ｃ＿２Ｓ·３ＣａＳＯ＿４·ＣａＦ＿２的形成动力学。研究发现Ａｌ＿２Ｏ＿３的存在促进了３Ｃ＿２Ｓ·３ＣａＳＯ＿４·ＣａＦ＿２的形成反应，降低了固相反应活化能，提高了控制反应过程组分ＣａＯ的扩散速率。     

关于优势水泥的思考

水泥采用ＩＳＯ强度检验方法与ＧＢ１７７－８５检验方法相比,强度值有所下降,特别是混合材料掺量较多,粉磨细度较粗的水泥的强度下降更多。这将促使水泥企业提高生产技术和管理水平。水泥厂为了提高水泥的ＩＳＯ强度,将调整水泥熟料的矿物组成,提高其Ｃ３Ｓ和Ｃ３Ａ的含量,同时提高水泥的粉磨细度。目前我国大中型水泥厂生产的硅酸盐水泥熟料,Ｃ３Ｓ含量大多高于５０％,最高可达５８％以上,Ｃ３Ａ含量在８％～１２％,熟料强度超过６５ＭＰａ。采用这样的熟料生产的３２．５级普通硅酸盐水泥,比表面积为３２０ｍ２／ｋｇ左右;４…     

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。