采用界面聚合法合成了聚联苯胺,聚(3,3-二甲氧基联苯胺)和聚(3,3-二甲基联苯胺).利用红外光谱(FT-IR),紫外可见吸收光谱(UV-v is),电子扫描显微镜(SEM),X-射线衍射(XRD),循环伏安(cyclic vo ltam-ogram)等测试方法,对聚合物进行了表征....采用界面聚合法合成了聚联苯胺,聚(3,3-二甲氧基联苯胺)和聚(3,3-二甲基联苯胺).利用红外光谱(FT-IR),紫外可见吸收光谱(UV-v is),电子扫描显微镜(SEM),X-射线衍射(XRD),循环伏安(cyclic vo ltam-ogram)等测试方法,对聚合物进行了表征.从环取代基的电子效应和立体效应以及界面聚合反应的特点,初步探讨了环取代基对界面聚合法合成的聚合物分子链的结构,结晶性,颗粒形貌以及电化学活性的影响.结果表明,界面聚合法合成聚联苯胺表现出尺寸在微米范围内的棒状分布,在紫外可见吸收光谱中,相对于聚联苯胺,聚(3,3-二甲氧基联苯胺)的吸收峰发生红移.聚(3,3-二甲氧基联苯胺)的结晶性在三种聚合物中相对较好.聚(3,3-二甲氧基联苯胺)的氧化还原峰电位与其余两种聚合物相比,有负移.说明界面聚合得到的聚合物的分子链的结构,结晶性,颗粒形貌以及电化学活性由环上取代基的电子效应和立体效应不同而有所变化.展开更多
Poly(o-pheneylidiamine) was synthesized by using facial synthesis method.The FTIR spectra,UV-vis absorption spectra and X-ray diffraction patterns were used to characterize the molecular structures of the polymer.The ...Poly(o-pheneylidiamine) was synthesized by using facial synthesis method.The FTIR spectra,UV-vis absorption spectra and X-ray diffraction patterns were used to characterize the molecular structures of the polymer.The morphologies of powders were studied by using TEM.Voltammetric study was done to investigate the electrochemical behaviors of poly(o-pheneylidiamine).The structure,crystallinity,morphology and electrochemical activity of the polymer were discussed.The results showed that Poly(o-pheneylidiamine) particles appeared as micro sticks in the micrograph,their diameter is from several decade nanometers to more than 100 nanometers.X-ray diffraction patterns showed the poly(o-pheneylidiamine) was highly ordered and put up a crystalloid form of suppositional simple cubic crystal.Voltammetric study indicated that the poly(o-pheneylidiamine) synthesized by facial synthesis method had good electrochemical activity.展开更多
以PEO-Br为大分子引发剂,通过ATRP法合成了一组两亲性两嵌段共聚物PEO45-bPtBAx(x=28,35,53).采用HNMR、FTIR、SEC和TEM对产物进行了表征,讨论了投料比对控制产物的分子链结构,分子量及其分布的影响.结果表明,tBA的转化率较高,1 H NMR...以PEO-Br为大分子引发剂,通过ATRP法合成了一组两亲性两嵌段共聚物PEO45-bPtBAx(x=28,35,53).采用HNMR、FTIR、SEC和TEM对产物进行了表征,讨论了投料比对控制产物的分子链结构,分子量及其分布的影响.结果表明,tBA的转化率较高,1 H NMR结果显示成功制得目标产物,所得嵌段共聚物均具有极窄的分子量分布(Mw/Mn≤1.07).在tBA相对于PEO-Br的投料比较小时可以对嵌段共聚物结构进行精确调控.tBA投入量的增大会导致分子量分布变宽及引发效率下降.PEO45-b-PtBA35被成功水解为PEO45-b-PAA35,在中性水溶液中PEO45-b-PAA35自组装形成了分散较为均匀的球形胶束.展开更多
文摘采用界面聚合法合成了聚联苯胺,聚(3,3-二甲氧基联苯胺)和聚(3,3-二甲基联苯胺).利用红外光谱(FT-IR),紫外可见吸收光谱(UV-v is),电子扫描显微镜(SEM),X-射线衍射(XRD),循环伏安(cyclic vo ltam-ogram)等测试方法,对聚合物进行了表征.从环取代基的电子效应和立体效应以及界面聚合反应的特点,初步探讨了环取代基对界面聚合法合成的聚合物分子链的结构,结晶性,颗粒形貌以及电化学活性的影响.结果表明,界面聚合法合成聚联苯胺表现出尺寸在微米范围内的棒状分布,在紫外可见吸收光谱中,相对于聚联苯胺,聚(3,3-二甲氧基联苯胺)的吸收峰发生红移.聚(3,3-二甲氧基联苯胺)的结晶性在三种聚合物中相对较好.聚(3,3-二甲氧基联苯胺)的氧化还原峰电位与其余两种聚合物相比,有负移.说明界面聚合得到的聚合物的分子链的结构,结晶性,颗粒形貌以及电化学活性由环上取代基的电子效应和立体效应不同而有所变化.
文摘Poly(o-pheneylidiamine) was synthesized by using facial synthesis method.The FTIR spectra,UV-vis absorption spectra and X-ray diffraction patterns were used to characterize the molecular structures of the polymer.The morphologies of powders were studied by using TEM.Voltammetric study was done to investigate the electrochemical behaviors of poly(o-pheneylidiamine).The structure,crystallinity,morphology and electrochemical activity of the polymer were discussed.The results showed that Poly(o-pheneylidiamine) particles appeared as micro sticks in the micrograph,their diameter is from several decade nanometers to more than 100 nanometers.X-ray diffraction patterns showed the poly(o-pheneylidiamine) was highly ordered and put up a crystalloid form of suppositional simple cubic crystal.Voltammetric study indicated that the poly(o-pheneylidiamine) synthesized by facial synthesis method had good electrochemical activity.
文摘以PEO-Br为大分子引发剂,通过ATRP法合成了一组两亲性两嵌段共聚物PEO45-bPtBAx(x=28,35,53).采用HNMR、FTIR、SEC和TEM对产物进行了表征,讨论了投料比对控制产物的分子链结构,分子量及其分布的影响.结果表明,tBA的转化率较高,1 H NMR结果显示成功制得目标产物,所得嵌段共聚物均具有极窄的分子量分布(Mw/Mn≤1.07).在tBA相对于PEO-Br的投料比较小时可以对嵌段共聚物结构进行精确调控.tBA投入量的增大会导致分子量分布变宽及引发效率下降.PEO45-b-PtBA35被成功水解为PEO45-b-PAA35,在中性水溶液中PEO45-b-PAA35自组装形成了分散较为均匀的球形胶束.
