Polystyrene Microspheres Coated with Smooth Polyaniline Shells: Preparation and Characterization

Polystyrene/polyaniline core-shell structure microspheres were synthesized in the presence of poly(sodium 4-styrenesulfonate) as stabilizer and hydrochloric acid as dopant to improve the processibility of conducting polyaniline. After the one-pot reacting process, the product was easily purified by washing with water. The polyaniline shell covering the polystyrene sphere surface was confirmed with FT-IR and X-ray photoelectron spectroscopy. The conductivity of the polyaniline-coated polystyrene particles was 0.0017 S/cm and increased to 0.1 S/cm after being doped in the HCl vapor. The morphology of the microspheres was characterized by TEM and SEM. The particles show a more uniform and smooth surface than previous particles.     

热致性芳香共聚酯液晶态的向错织构

关于高分子液晶态向错织构的研究,特别是直接观察其结构的工作目前尚不多。我们对芳香共聚酯热致性液晶态的向错织构进行了研究,第一次在同一张照相中可看到向错和条带织构.热致性芳香共聚酷是一种向列相高分子液晶材料,在偏光显微镜下呈现出特征的向错织     

丙烯酸系反相乳液共聚合反应的研究

丙烯酸系共聚物具有广泛的用途，采用反相乳液聚合的方法对其进行了合成规律的研究。在以Ｓｐａｎ－Ｔｗｅｅｎ类或Ｓｐａｎ－ＯＰ类为乳化剂，脂肪烃为油相介质，在用氧化还原引发剂的条件下，研究了聚合反应温度、反应时间、水相ｐＨ值、单体浓度、油水比、共聚单体配比、交联剂用量对聚合反应及产物性能的影响，得到了质量分数ｗ为２％水溶液的粘度η达２０ＰａＳ以上的增稠产物。     

用于胶版印刷的可热固化环氧树脂/异氰酸酯体系

提出了一种以聚二甲基硅氧烷(PDMS)为印刷滚筒的、在玻璃基材表面可大面积印刷聚合物图案的胶版印刷技术,并开发了相应的油墨。该油墨由环氧树脂基聚合物BPAN及异佛尔酮二异氰酸酯(IPDI)组成的热固性双组分聚合物体系和红色分散颜料组成。采用原位红外光谱法研究了热固性体系的热固化。结果表明BPAN/IPDI双组分体系有良好的热固化性能。固化薄膜具有良好的耐溶剂性能和光学性能。应用本工艺得到分辨率为100μm的聚合物图案。     

含联苯基团热致液晶聚脲的合成与表征

为合成新型热致液晶聚脲,以含液晶基元的联苯二胺（或联邻甲苯胺）、1,6-己二胺、2,4-甲苯二异氰酸酯为原料进行合成。通过改变单体加料顺序发现,仅当先加入己二胺与2,4-甲苯二异氰酸酯预聚,再加入芳香二胺聚合,所得的聚合物才有液晶性。采用这种加料顺序,通过改变芳香,脂肪两种二胺的配比,合成了两个系列的热致液晶聚脲,并确定了合成热致液晶聚脲的最佳配比范围。所得聚合物用偏光显微镜,示差扫描量热分析,广角、小角X射线衍射等方法进行表征,确定了其液晶织构属于向列型。     

Synthesis and Absorption Characteristics of Two Infrared Cyanine Dyes

Introduction　　Informationrecordingmediaforrecordingand/orreproducinginformationusinghighenergydensitylaserbeamshavebeendevelopedformanyyears[1].Suchrecordingmediahavebeenwidelyutilizedinvariousfields,forexample,asopticaldiscs,micro-imagerecordingmedia,micro-facsimiles,andopticalcards.Inrecentyears,newlydevelopednearinfraredlaserdiodeswhicharestable,inexpensive,andconvenienttooperatehaveattractedmuchattention.Infraredcyaninedyeshavemanydistinctvirtues,suchashighextinctioncoefficients,highfluo…     

Synthesis and Characterization of Photoresponsive Azo Polyelectrolytes

IntroductionPhotoresponsive polymers have been extensivelyinvestigated for their potential applications in theareas of optical information storage and opticalcontrolling processes.Azo polymers are receivingincreasing attention because of their specialproperties and interesting potential applications,including light- induced phase transition of LCP[1] ,command surfaces[2 ] ,light- induced birefringenceand dichroism[3] ,second- order opticalnonlinearity[4 ] ,light- induced surface reliefgrating…     

芳-脂族共聚酯酰胺热致液晶的合成和表征

利用芳－脂复合二酰氯和四种芳族二元胺合成了３个系列含有两种芳香二胺结 构单元的无规芳－脂共聚酯酰胺，其对数比浓粘度为 １．３０～２．１８ ｄＬ／ｇ。用偏光显微镜、 Ｘ光衍射和ＤＳＣ对聚合物的液晶行为进行了研究。     

SynthesisandCroslinkingMechanismofaPolyacrylate／polyurethaneCompositeCoating

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