本文主要研究内容
作者袁震(2019)在《含柔性支链聚酰亚胺的合成及聚合动力学研究》一文中研究指出:随着平板电脑、大屏电视、汽车仪表等电子设备的普及,对屏幕的显示质量要求也越来越高,显示画面清晰、耐摩擦性能好、宽可视角的液晶显示器逐渐进入了大众视野。为满足上述需求,不仅需要寻求新型的液晶材料,也要求性能优良的液晶取向膜。聚酰亚胺凭借其优良的耐热性、抗腐蚀性能、机械强度以及与液晶的亲和性成为液晶取向膜的首选材料。聚酰亚胺常用的合成方法是两步法,其中第一步形成聚酰胺酸预聚体对后续成膜的加工工艺、综合性能有很大影响。因此,研究聚酰胺酸聚合动力学、设计并合成具有柔性支链的聚酰亚胺,可为高性能聚酰亚胺的合成提供重要的实验依据。本文以均苯四甲酸二酐(PMDA)与N,N-二氨基二苯醚(ODA)合成聚酰胺酸,使用FTIR对产品结构进行表征,通过HPLC对反应过程中ODA的浓度进行实时检测,推导出可能的自催化反应机理。结果表明:聚酰胺酸的生成为自催化二阶可逆反应,中间态络合物的生成为控制步骤,而中间态络合物的分解生成聚酰胺酸为快反应。根据反应机理推导的反应速率方程为r=dA/dt=k1A2)-k2(A0-A)+k3A2(A0-A)-k6(A0-A)2,常温下反应速率常数分别为k1=0.11~0.23 L2·s2/mol2;k2=0.0007~0.0024 L·s/mol;k3=4.2~6.4 L3·s3/mol3;k6 =0.05-0.2 L2·s2/mol2。以2,3,4-三氟硝基苯、4-(4-庚基环己基)-苯酚等原料合成了含柔性支链的对苯二胺(L-14),并与1,2,3,4-环丁烷四甲酸二酐(CBDA)反应合成了一种新型含柔性支链聚酰亚胺液晶垂直取向剂。溶解性测试结果表明,该聚酰亚胺不仅溶于N-甲级吡咯烷酮这类高沸点的溶剂,在低沸点的溶剂如氯仿中也有很好的溶解性;以该聚酰亚胺膜作为液晶取向层制备液晶显示元件,测试了其预倾角、液晶定向时间、陡度、对比度、电压保持率和蓄积电荷的缓和特性等。结果表明:其预倾角在89.7°左右,增大毛压入量预倾角基本保持不变,陡度在1.73左右,对比度高达16120,说明其取向性能优良,显示画面清晰,能适应多路数的需求;液晶定向时间在5s~7s之间且无按压不恢复的情况,说明该液晶显示元件的定向时间短,屏幕转换速率快;电压保持率在99%以上,蓄积电荷缓和特性在29%左右,说明该液晶显示元件的亲电性能良好,残像消失快,使用寿命长;改变原料中PDA与L-14的比例发现,L-14与PDA的比例为8:2时生成的聚酰亚胺黏度适中,且随着支链的增多,液晶显示元件的光学性能与亲电性能有很大程度的提升。
Abstract
sui zhao ping ban dian nao 、da bing dian shi 、qi che yi biao deng dian zi she bei de pu ji ,dui bing mu de xian shi zhi liang yao qiu ye yue lai yue gao ,xian shi hua mian qing xi 、nai ma ca xing neng hao 、kuan ke shi jiao de ye jing xian shi qi zhu jian jin ru le da zhong shi ye 。wei man zu shang shu xu qiu ,bu jin xu yao xun qiu xin xing de ye jing cai liao ,ye yao qiu xing neng you liang de ye jing qu xiang mo 。ju xian ya an ping jie ji you liang de nai re xing 、kang fu shi xing neng 、ji xie jiang du yi ji yu ye jing de qin he xing cheng wei ye jing qu xiang mo de shou shua cai liao 。ju xian ya an chang yong de ge cheng fang fa shi liang bu fa ,ji zhong di yi bu xing cheng ju xian an suan yu ju ti dui hou xu cheng mo de jia gong gong yi 、zeng ge xing neng you hen da ying xiang 。yin ci ,yan jiu ju xian an suan ju ge dong li xue 、she ji bing ge cheng ju you rou xing zhi lian de ju xian ya an ,ke wei gao xing neng ju xian ya an de ge cheng di gong chong yao de shi yan yi ju 。ben wen yi jun ben si jia suan er gan (PMDA)yu N,N-er an ji er ben mi (ODA)ge cheng ju xian an suan ,shi yong FTIRdui chan pin jie gou jin hang biao zheng ,tong guo HPLCdui fan ying guo cheng zhong ODAde nong du jin hang shi shi jian ce ,tui dao chu ke neng de zi cui hua fan ying ji li 。jie guo biao ming :ju xian an suan de sheng cheng wei zi cui hua er jie ke ni fan ying ,zhong jian tai lao ge wu de sheng cheng wei kong zhi bu zhou ,er zhong jian tai lao ge wu de fen jie sheng cheng ju xian an suan wei kuai fan ying 。gen ju fan ying ji li tui dao de fan ying su lv fang cheng wei r=dA/dt=k1A2)-k2(A0-A)+k3A2(A0-A)-k6(A0-A)2,chang wen xia fan ying su lv chang shu fen bie wei k1=0.11~0.23 L2·s2/mol2;k2=0.0007~0.0024 L·s/mol;k3=4.2~6.4 L3·s3/mol3;k6 =0.05-0.2 L2·s2/mol2。yi 2,3,4-san fu xiao ji ben 、4-(4-geng ji huan ji ji )-ben fen deng yuan liao ge cheng le han rou xing zhi lian de dui ben er an (L-14),bing yu 1,2,3,4-huan ding wan si jia suan er gan (CBDA)fan ying ge cheng le yi chong xin xing han rou xing zhi lian ju xian ya an ye jing chui zhi qu xiang ji 。rong jie xing ce shi jie guo biao ming ,gai ju xian ya an bu jin rong yu N-jia ji bi ge wan tong zhe lei gao fei dian de rong ji ,zai di fei dian de rong ji ru lv fang zhong ye you hen hao de rong jie xing ;yi gai ju xian ya an mo zuo wei ye jing qu xiang ceng zhi bei ye jing xian shi yuan jian ,ce shi le ji yu qing jiao 、ye jing ding xiang shi jian 、dou du 、dui bi du 、dian ya bao chi lv he xu ji dian he de huan he te xing deng 。jie guo biao ming :ji yu qing jiao zai 89.7°zuo you ,zeng da mao ya ru liang yu qing jiao ji ben bao chi bu bian ,dou du zai 1.73zuo you ,dui bi du gao da 16120,shui ming ji qu xiang xing neng you liang ,xian shi hua mian qing xi ,neng kuo ying duo lu shu de xu qiu ;ye jing ding xiang shi jian zai 5s~7szhi jian ju mo an ya bu hui fu de qing kuang ,shui ming gai ye jing xian shi yuan jian de ding xiang shi jian duan ,bing mu zhuai huan su lv kuai ;dian ya bao chi lv zai 99%yi shang ,xu ji dian he huan he te xing zai 29%zuo you ,shui ming gai ye jing xian shi yuan jian de qin dian xing neng liang hao ,can xiang xiao shi kuai ,shi yong shou ming chang ;gai bian yuan liao zhong PDAyu L-14de bi li fa xian ,L-14yu PDAde bi li wei 8:2shi sheng cheng de ju xian ya an nian du kuo zhong ,ju sui zhao zhi lian de zeng duo ,ye jing xian shi yuan jian de guang xue xing neng yu qin dian xing neng you hen da cheng du de di sheng 。
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论文详细介绍
论文作者分别是来自青岛科技大学的袁震,发表于刊物青岛科技大学2019-07-19论文,是一篇关于聚酰亚胺论文,聚合动力学论文,自催化可逆反应论文,柔性支链取代论文,光学性能论文,青岛科技大学2019-07-19论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自青岛科技大学2019-07-19论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:聚酰亚胺论文; 聚合动力学论文; 自催化可逆反应论文; 柔性支链取代论文; 光学性能论文; 青岛科技大学2019-07-19论文;