共查询到17条相似文献,搜索用时 62 毫秒
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含偶氮苯的咔唑类双功能光折变聚合物的合成及表征 总被引:1,自引:1,他引:1
通过后重氮偶合方法制备了一系列不同生色团含量的咔唑类双功能光折变聚合物,并用IR、^1H-NMR、UV-vis、DSC以及GPC等对聚合物进行了分析和表征。IR和UV-vis谱图显示偶氮苯基团已接到咔唑环上。UV-vis结果表明:反应时间对该反应的影响非常大,当反应时间从6h增加到60h时,聚合物中生色团的含量从13.5%升高到66.7%。GPC结果显示后重氮偶合法比常规方法得到的该类聚合物的分子量明显提高。DSC结果显示聚合物的玻璃化转变温度随偶氮苯含量的增加而升高。 相似文献
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设计并合成了含偶氮苯生色团的环氧类功能单体和仅含咔唑环的单体,并以一定比例通过阳离子开环聚合合成了三个新的非共轭主链具有光折变生色团的聚合物,并用GPC、DSC、FT-IR、TG和UV-Vis等手段对所得聚合物进行了表征,考察了共聚单体配比对聚合物玻璃化转变温度的影响。UV-Vis谱图说明聚合物的最大吸收波长取决于生色团的种类。DSC结果显示,通过改变两个单体的配比可以有效调节共聚产物的玻璃化转变温度。TG结果显示,聚合物具有好的热稳定性,325℃左右开始分解。 相似文献
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β-萘酚取代聚磷腈的合成与表征 总被引:1,自引:0,他引:1
β-萘酚取代聚磷腈的合成与表征徐师兵,郑福安,杨永刚(华东理工大学高分子材料所,上海,200237)(吉林大学理论化学研究所)关键词聚氯化磷腈,N-二氯磷酰P-三氯单磷腈,β-萘酚取代聚磷腈无机高分子聚氯化磷腈中的氯原子具有很高的反应活性,它可与许多... 相似文献
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β-萘酚取代聚磷腈的合成与表征 总被引:3,自引:0,他引:3
The method of preparing N-dichlorophosphoryl-P-trichloromonophosphazene as monomer from PCl5 and(NH4)2 SO4 in 1, 1, 2, 2-tetrachloroethane was investigated. Polydichlorophosphazene can be obtained from the polycondensation of this monomer and poly (β-naphthyloxy) phosphazen (I) was prepared from polydichlorophosphazene and sodium β-naphthyloxy.At the same time, the IR, 31P NMRof the title polymers were determined.The glass transition and viscous flow temperatures determined by TBAare-83℃ and 19℃respectively. Decomposition temperature measured by TGis 338℃.The Mn of Iestimated by VPOis 4110. 相似文献
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Ze LIU Li Xiang WANG* Xia Bin JING Fo Song WANG The State Key Laboratory of Polymer Physics Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 《中国化学快报》2002,13(3)
For making the polymer light-emitting diode (PLED) device with good performance, it is desirable to reach the balance of electron and hole injection. However, for most conjugated polymer, hole injection is more favorable than electron injection. So it is important to design and synthesize the bipolar conjugated polymer with both electron and hole transporting ability for the fabrication of single-layer PLED1-2. In this communication we present the synthesis and preliminary characterizatio… 相似文献
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一种连有C_60功能基团的聚磷腈的合成 总被引:3,自引:0,他引:3
采用一种后功能化的方法合成一种连有C_60侧基的聚磷腈高分子,即首先合成 了连有苄溴基团的聚磷腈,然后将苄溴基团转换为叠氮基团,再合成连有C_60侧基 的聚磷腈高分子,通过核磁、红外、紫外可见光谱、分子量测定等手段对所得高分 子进行了鉴定,此合成方法为聚磷腈功能材料的合成提供了一条新途径。 相似文献
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Yadong Zhang Tatsuo Wada Hiroyuki Sasabe 《Journal of polymer science. Part A, Polymer chemistry》1996,34(12):2289-2298
A series of α,ω-bis(3-formylcarbazolyl)alkane monomers have been prepared starting from carbazole and α,ω-dibromoalkane in two steps. Main-chain polymers with carbazole substituted with one acceptor group as the nonlinear optical (NLO) chromophores and photoconductive moieties were synthesized by the Knoevenagel polycondensation of α,ω-bis(3-formylcarbazolyl)alkane and 1,6-bis(cyanoacetoxy)hexane using 4-(N,N-dimethyl)pyridine (DMAP) as a base. This Knoevenagel polycondensation involved two stages: polycondensation was first carried out in tetrahydrofuran solution, and then polycondensation was allowed to continue in the solid-state after removal of solvent. All of these main-chain polymers characterized by spectroscopic methods and elemental analyses are soluble in common low boiling organic solvents, such as chloroform. These polymers were found to be amorphous with glass transition temperatures in the range of 94–117°C by differential scanning calorimetry. This two-stage polycondensation gave polymers with weight-average molecular weight in the range of 25,000–72,000 g/mol by gel permeation chromatography. The study of the nonlinear optical and photorefractive properties of these polymers is in progress. © 1996 John Wiley & Sons, Inc. 相似文献
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以六氯环三磷腈(HCCP)和荧光素(FL)为单体、乙腈为溶剂、三乙胺(TEA)为缚酸剂,在室温超声作用下,通过沉淀聚合,成功制备了具有良好荧光性能的聚磷腈纳米粒子(PZF)。通过红外光谱、X射线能谱分析(EDS)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对PZF的化学结构和组成元素进行了分析。结果表明:制备的PZF是实心结构且粒径均一,具有良好的荧光性能;在365nm紫外光下照射不同时间后PZF的荧光强度几乎没有发生变化,说明制备得到的PZF具有强耐光漂白性。 相似文献