NBR改性HPVC鞋用材料的研制

研究了ＮＢＲ对高聚合度ＰＶＣ（ＨＰＶＣ）进行改性制备的非交联型ＨＰＶＣ／ＮＢＲ热塑性鞋用材料，考察了ＨＰＶＣ和ＮＢＲ并用比、填料、增塑剂及共混温度对材料性能的影响。结果表明，当ＨＰＶＣ／ＮＢＲ＝８７／１３、增塑剂ＤＯＰ用量为７０份、填料用量为２０～２５份、其它助剂适量及共混温度为１７０℃时，制得的鞋用材料性能良好，达到了ＧＢ４４９２—８４标准要求     

四亚乙基五胺对PVC和PVC/NBR共混物的交联作用

从硫化特性、热变形值、凝胶质量分数和物理性能等方面考察了四亚乙基五胺（ＴＥＰＡ）对ＰＶＣ和ＰＶＣ／ＮＢＲ共混物的交联作用以及ＰＶＣ和ＮＢＲ同时交联对共混物性能的影响。结果表明,ＰＶＣ／ＮＢＲ共混物中的ＰＶＣ组分交联后,共混物的物理性能和热变形性能都有所改善;ＰＶＣ和ＮＢＲ两组分同时交联可改善共混物的物理性能和热变形性能,在ＮＢＲ用量较大（６０份以上）时效果更为明显,若ＮＢＲ用量太低,则共混物热变形性能反而有所下降;交联剂ＴＥＰＡ对硫黄硫化ＮＢＲ有一定抑制作用,对共混物的物理性能影响不大,但在一定用量范围内有较小的劣化作用     

丁腈橡胶/聚氯乙烯共混型纺化纤胶圈胶料的研制

丁腈橡胶（ＮＢＲ）／聚氯乙烯（ＰＶＣ）共混型纺化纤胶圈胶料可通过调整增塑剂ＤＢＰ用量（２５份）、白炭黑用量（５份）使ＮＢＲ／ＰＶＣ之比达１００／８０，而胶料的拉伸强度、扯断伸长率、３００％定伸应力等均较好，邵尔Ａ型硬度达到控制指标（７２度）。胶料的挤出条件为：挤出机机头温度７０—８０℃，螺杆转速３５ｒ·ｍｉｎ－１．     

PVC／NBR再生胶共混型热塑性弹性体的研究

用ＰＶＣ与ＮＢＲ再生胶高温机械共混,制备了具有交联结构的、Ｔｇ约１０℃的热塑性弹性体。讨论了共混比、第三组分改性剂合成橡胶（ＮＢＲ,ＰＵ,ＣＲ,ＣＰＥ）、５种硫化体系、填充剂（炭黑、白炭黑、重质ＣａＣＯ３）、增塑剂邻苯二甲酸二辛酯等因素对性能的影响。结果表明：ＰＶＣ６０份,ＮＢＲ再生胶４０份,ＮＢＲ３６０４２０份,硫磺０．５份,促进剂ＴＭＴＤ和促进剂ＣＺ各０．６￣０．９份及适量重质ＣａＣＯ３和增塑     

耐液化石油气橡胶膜片的研制

介绍以丁腈橡胶（ＮＢＲ）为主体材料,制备耐液化石油气橡胶膜片的过程。重点探讨了丁腈橡胶中结合丙烯腈量、改性ＰＶＣ弹性体用量、硫化体系、补强剂、软化剂等因素对橡胶膜片耐液化石油气性能和机械性能的影响。结果表明：选择ＮＢＲ－２７０７１００份;硫黄２．０份;高耐磨炭黑与半补强炭黑并用补强体系６０份;古马隆５份;ＤＯＰ５份及适量其它助剂,可制得性能优越,符合行业标准ＺＢＰ４５００１－９０要求的耐液化石油气橡胶膜片。     

聚氯乙烯／橡胶并用胶辊的研制

研究了采用聚氯乙烯（ＰＶＣ），丁腈橡胶（ＮＢＲ）和顺丁橡胶（ＢＲ）三元共混制备模压浅色胶辊的配方和工艺，主要探讨了ＰＶＣ／ＮＢＲ／ＢＲ共混比、稳定剂、填充剂、硫化体系等因素对橡塑并用胶辊性能的影响．实验结果表明：选择ＰＶＣ／ＮＢＲ／ＢＲ＝３０／６０／１０，并配以白炭黑，过氧化物和少量硫黄硫化体系，可制得综合性能较好的浅色橡胶胶辊．     

NBR／EPDM共混橡胶

ＮＢＲ／ＥＰＤＭ共混橡胶《弹性体》１９９３，№１报导，北京化工学院利用商品化高聚物ＥＶＡ－１４作增容剂，制得了优异机械性能的ＮＢＲ／ＥＰＤＭ共混胶。胶料配方为：ＮＢＲ６０，ＥＰＤＭ３０，ＥＶＡ－１４１０，ＨＡＦ３０，ＤＢＰ１０，防ＲＤ１．０，ＺｎＯ５...     

影响橡塑整芯难燃输送带粘合强度的因素

研究了乳液法ＰＶＣ（简称乳ＰＶＣ）、悬浮法ＰＶＣ（简称悬ＰＶＣ）和粘合剂用量、阻燃增塑剂、带芯含棉量等因素对橡塑整芯难燃输送带粘合性能的影响。结果表明，在覆盖胶中可用２０～２５份乳ＰＶＣ等量替代ＣＲ／ＮＢＲ／氯化聚乙烯（ＣＰＥ）（４０／４０／２０）配方体系中的ＮＢＲ，也可用４０～６０份悬ＰＶＣ等量替代ＮＢＲ配方体系中的ＮＢＲ；浸渍液中增塑剂选择ＺＲＳ５０／ＤＯＰ／４２％氯化石蜡并用最适宜；覆盖胶中加入粘合剂Ａ，可提高粘合强度，用量宜为１５～２５份；带芯含棉量为３０％～４０％较为合理。     

PVC/SBR共混改性的研究

对于非相容性ＰＶＣ／ＳＢＲ（１００／２０）共混体系，相容剂、增塑剂、填料和硫化剂用量以及返炼次数对共混体物理性能均有影响。试验结果表明：ＮＢＲ－２６是ＰＶＣ／ＳＢＲ共混体的良好相容剂，可以显著改善共混体的力学性能，用量以６份为宜。增塑剂ＤＯＰ为１００份、碳酸钙为８０份、硫黄为０．１份时，ＰＶＣ／ＳＢＲ共混体可获得良好的综合性能。返炼次数对共混体性能影响不大。     

影响橡胶整芯难燃输送带粘合强度的因素

研究了乳液法ＰＶＣ（简称乳ＰＶＣ）悬浮法ＰＶＣ（简称悬ＰＶＣ）和粘合剂用量，阻燃增塑剂，带芯含棉量等因素对橡塑整芯难燃输送带粘合性能的影响，结果表明，在覆盖胶中可用２０～２５份乳ＰＶＣ等量替代ＣＲ／ＮＢＲ／氯化聚乙烯（ＣＰＥ）（４０／４０／２０）配方体系中的ＮＢＲ，也可用４０～６０份悬ＰＶＣ等量替代ＮＢＲ配方体系中的ＮＢＲ，浸渍液中增塑剂选择ＺＲＳ－５０／ＤＯＰ／４２％氯化石蜡并用最适宜，覆盖胶中     

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。