CAJ | 학술논문

苯丙炔酸上的羧基起到终止剂的作用,限制了苯丙炔酸的聚合。加入NaOH将单体转化成钠盐,聚合后用HCl酸化成聚苯丙炔酸。单体由肉桂酸和液溴通过先加成后消去反应制得。利用红外光谱、紫外光谱、荧光光谱、凝胶渗透色谱和TGA对单体及聚合物的结构和性能进行了表征,2212cm-1处C≡C键伸缩振动特征吸收峰消失形成1602cm-1C—C键伸缩振动特征峰,表明了聚合物的合成。荧光光谱显示聚苯丙炔酸在375nm激发波长下发蓝光,于465nm处有特征荧光发射峰,与没有加NaOH聚合的聚合物相比较,紫外吸收波长范围更大,加碱聚合的聚苯丙炔酸分子量能达到10552,TGA测试结果表明聚苯丙炔酸具有一定的热稳定性。
분병결산상적최기기도종지제적작용,한제료분병결산적취합。가입NaOH장단체전화성납염,취합후용HCl산화성취분병결산。단체유육계산화액추통과선가성후소거반응제득。이용홍외광보、자외광보、형광광보、응효삼투색보화TGA대단체급취합물적결구화성능진행료표정,2212cm-1처C≡C건신축진동특정흡수봉소실형성1602cm-1C—C건신축진동특정봉,표명료취합물적합성。형광광보현시취분병결산재375nm격발파장하발람광,우465nm처유특정형광발사봉,여몰유가NaOH취합적취합물상비교,자외흡수파장범위경대,가감취합적취분병결산분자량능체도10552,TGA측시결과표명취분병결산구유일정적열은정성。
Acetic acid of phenylpropiolic acid （PhPA） is an effective terminator, so PhPA can not be directly pol- ymerized. After adding NaOH, the monomer is conversion into sodium salt. Then phenylpropiolic acid salt was polymerized into phenylpropiolic acid salt. With HC1 acidification, we can get phenylpropiolic acid. The mono- mer was synthesized by the addition reaction of cinnamic acid with bromine and the followed elimination reac- tion. The structure and properties of both PhPA and PPhPA were confirmed by IR, UV, FS, GPC and TGA. The disappearance of the characteristic vibrations at 2212cm^-1 （C =C ） and the appearance of the characteristic vibrations at 1602cm^-1 （ C=C ） indicated the polymerization of monomers （Mw = 10552） which has higher mo- lecular weight and absorption spectra than without NaOH. On the fluorescence investigation of the polymer, the solutions of polymer emit blue light and show the peak emissions at 465 nm when excited at 375 nm. The polymer also has thermal stability.