氧化淀粉与聚醋酸乙烯乳液共混体系的粘接性能研究

提出了氧化淀粉共混改性聚醋酸乙烯乳液的机理，采用计算机辅助设计法确定了最优配方。试验结果表明，共混改性后的聚醋酸乙烯乳液具有粘接强度高、耐水性好、固化速度快等特点，可显著降低聚醋酸乙烯乳液的生产成本。     

改性聚醋酸乙烯乳液研究进展

聚醋酸乙烯乳液又称为白乳胶，在日常生活中应用广泛，但由于自身的固有缺点，使其应用受到某些方面限制，经过多方面改性，性能得到改进，能满足生产、生活多方面的需要，本文简述了聚醋酸乙烯乳液改性研究的一些现状及进展。     

正交实验法用于新型固体胶棒的研究

介绍了以硬脂酸盐类为凝胶剂,以聚乙烯醇（ＰＶＡ）改性的聚醋酸乙烯乳液（ＰＶＡｃ）为胶粘剂制备固体胶棒的方法,用正交实验法试验了凝胶剂、胶粘剂、溶剂及保湿剂用量对产品性能的影响,确定了最佳配方和工艺条件。     

改性聚醋酸乙烯乳液的研究

研究了改性聚醋酸乙烯乳液体系改性单体及聚合工艺、乳化剂、改性剂、增塑剂对乳液性能的影响。     

改性羧甲基羟丙基纤维素作聚醋酸乙烯乳液增稠剂的研究

用旋转粘度计研究了改性羧甲基羟丙基纤维素在聚醋酸乙烯乳液中的增稠效应。通过与非离子型羟乙基纤维素及离子型羧甲基纤维素的比较试验表明,改性羧甲基羟丙基纤维素用作聚醋酸乙烯乳液增稠剂有良好的增稠性、稳定性和配伍性。     

后缩醛改性聚醋酸乙烯乳液的研制

介绍了一种后缩醛改性聚醋酸乙烯乳液的制备方法，使聚醋酸乙烯乳液的耐水性、抗冻性能、粘接强度和流动性等有明显改善，可用于制备乳胶漆或其他对耐水性能有特殊要求的领域。     

新型聚醋酸乙烯乳液的研究进展

综述了普通聚醋酸乙烯乳液胶粘剂的缺点及其原因,以及当前改性聚醋酸乙烯乳液胶粘剂的研究进展。     

新型耐水性聚醋酸乙烯乳液粘合剂的研制

]本研究通过对聚醋酸乙烯乳液中保护胶体的改性、测定复合乳化剂cmc值以确定其复配比例和用量，以及在聚合单体中溶入流水性树脂等方法，制得耐水性较好的新型聚醋酸乙烯乳液粘合剂。     

改性聚醋酸乙烯乳液

介绍了采用聚乙烯醇、甲醛、尿素的方法对聚醋酸乙烯乳液进行改性,研制了抗冻、耐水、高强度、低成本的聚醋酸乙烯乳液。     

新型聚醋酸乙烯乳液的研究进展

总结了普通聚醋酸乙烯乳液胶粘剂的缺点及其原因,综述了当前改性聚醋酸乙烯乳液胶粘剂的研究进展.     

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。