甲醇存在下St—BA—EHA体系的无皂乳液聚合研究

在甲醇存在下，以苯乙烯（St)和丙烯酸丁酯（BA）为主单,体内烯酸－2－羟乙酯（HEA）为功能单体，采用无皂乳液聚合技术，合成了聚合物微球。考察了助溶剂甲醇的用量，引发剂用量，以及丙烯酸－2－羟乙酯的的用量对聚合反应速率，乳胶粒的粒径及单分散性的影响，试验结果表明，加入适量的甲醇可以加快聚合反应速率，增大乳胶粒的粒径，提高单分散性。另外，在一定量的甲醇条件下，增加引发剂以及丙烯酸－2－羟乙酯的用量加快了反应速率，同时也使乳胶粒的粒径增大。     

交联型聚丙烯酸丁酯胶乳的合成

以十二烷基硫酸钠为乳化剂，过硫酸铵为引发剂，丙烯酸丁酯经两步乳液聚合，合成了胶粒粒径大于２５０ｎｍ，凝胶含量大９０％，适用于合成丙烯酯酯－丙烯腈－苯乙烯共聚物的交联型聚丙烯酸丁酯胶乳。第一步乳液聚合配方及条件：乳化剂用量２％－４％，引发剂用量０．１％－０．４％，交联剂用量２．４％－２．８％；单体采用滴加乳液法或滴加单体法，聚合温度６０－７０℃，聚合时间３－４ｈ，第二步种子聚合条件：乳化剂用量／种子     

酚醛泡沫塑料研究

针对影响酚醛泡沫性质的众多参数的不确定性，给出了可发泡性甲阶酚醛树脂的合成方法及酚醛泡沫塑料发泡典型配方；考察了反应温度及水含量对酚醛树脂粘度的影响，讨论了表面活性剂、发泡剂、固化剂及发泡温度对泡沫性能的影响。结果表明：当表面活性剂用量为4％－7％，发泡剂用量为4％－10％，固化剂用量为8％－125，发泡温度在70－80℃范围时，可制得较好的酚醛泡沫塑料。     

相转移催化法合成1，4－二（4＇－甲基苯氧基）丁烷

本文研究了相转移催化法合成１，４－二（４＇－甲基苯氧基）丁烷的工艺，分析了影响该反应的催化剂用量、原料配比、反应时间、碱用量和浓度等因素，确定了适合于工业化生产的较佳反应条件。     

胶乳型互穿聚合物网络研究（II）：环氧树脂／聚丙烯酸酯Semi—LIPN的聚合反应

采用氧化还原引发体系及复合乳液聚合方法，研究了环氧树脂／聚（苯乙烯－丙烯酸丁酯－甲基丙烯酸甲酯）［ＥＰ／Ｐ（Ｓｔ－ＢＡ－ＭＭＡ）］半胶乳型互聚合物网络（Ｓｅｍｉ－ＬＩＰＮ）的聚合反应规律。考察了反应温度、引发剂用量、乳化剂用量、交联剂种类及用量，特别是ＥＰ含量对单体转化率及反应速率的影响。环氧树脂因含有微量双酚Ａ，在聚合反应中同时起到了阻聚剂和缓聚剂的作用。从而使得该聚合反应较不含合成树脂（或橡胶     

相转移催化法合成1,4—二（4‘—甲基苯氧基）丁烷

本文研究了相转移催化法合成１，４－二（４＇－甲基苯氧基）丁烷的工艺，分析了影响该反应的催化剂用量、原料配比、反应时间、碱用量和浓度等因素，确定了适合于工业化生产的较佳反应条件。     

铸造用氧化镁—磷酸盐胶粘剂耐潮湿性能的研究

分析了胶粘剂ＭｇＯ－（Ａｌ２Ｏ３－Ｐ２Ｏ５－Ｈ２Ｏ）的硬化与吸潮机理，讨论了促进剂（ＭｇＯ）用量，柠檬酸用量对胶粘剂性能的影响。     

固－液相转移催化合成二甘醇单十二烷基醚

本文研究了固－液相转移催化合成二甘醇单十二烷基醚的催化剂及其用量、反应温度对产率的影响，筛选出几种较好的相转移催化剂，（例如ＴＢＡＢ，ＰＥＧ－４００，ＰＥＧ－６００），并确定了它们的较佳用量和较适宜的反应温度。     

马来酸酐接枝乙烯—1—辛烯共聚物的研究

采用熔融法制备了马来酸酊（MAH）接枝乙烯－1－辛烯共聚物（POE），讨论了引发剂用量，MAH用量，阻交联剂，接枝反应温度，反应时间对接枝率和凝胶率的影响。     

硫黄硫化天然橡胶的新型二元促进剂体系

研究了在NR胶料中将1－苯基－2，4－二硫代缩二脲（DTB）作为2－（4－吗啉硫代）苯并噻唑（MBS）的副促进剂的效果。结果发现，所有硫化反应都是一级反应，与DTB的用量无关。分析了不同DTB用量下硫化胶的力学性能，发现NR的应变结晶性未受DTB影响。根据加工性能、力学性能和溶胀行为确定DTB的最佳用量0．25－0．5质量份。     

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。