摘要
研究了甲基丙烯酸十八烷基酯(ODMA)的电子转移再生催化剂原子转移自由基聚合(ARGET ATRP)。详细研究了反应温度、配体用量、还原剂用量对聚合速率及反应可控性的影响。通过凝胶渗透色谱仪(GPC),热失重分析仪(TGA),差式扫描量热分析仪(DSC),水接触角(WCA)和原子力显微镜(AFM)等方法对聚甲基丙烯酸十八烷基酯(PODMA)的结构及性能进行了研究。结果表明:反应温度在75～95℃,配体用量为催化剂摩尔量的10～20倍,还原剂用量为催化剂摩尔量的5～20倍的范围内,采用ARGET ATRP法均能成功合成分子量可控且分子量分布窄的聚甲基丙烯酸十八烷基酯,可控反应条件较短链甲基丙烯酸酯的要宽,这主要是由于甲基丙烯酸十八烷基酯具有长的侧链,其终止速率常数也比相应短侧链的甲基丙烯酸酯类低造成的。研究发现聚甲基丙烯酸十八烷基酯薄膜对水的接触角达到103°,这是由于聚甲基丙烯酸十八烷基酯低表面能的长烷基侧链,和侧链的结晶造成凹凸不平表面共同引起的。
The activator regenerated by electron transfer atom transfer radical polymerization(ARGET ATRP)of octadecyl methacrylate(ODMA)was investigated.Effects of reaction temperature,ligand and reducing agent dosages on polymerization rate and reaction controllability were studied.The structure and properties of poly(octadecyl methacrylate)(PODMA)were studied by gel permeation chromatography(GPC),thermo gravimetric analyzer(TGA),differential scanning calorimetry(DSC),water contact angle(WCA)and atomic force microscopy(AFM).The results show that when the reaction temperature is between75~95℃,ligand dosage is10~20times of catalyst molar dosage and reductant dosage is5~20times of catalyst molar dosage,octadecyl methacrylate can be polymerized via ARGET ATRP with good controllability and narrow molecular weight distribution.Moreover,such polymerization conditions are wider than that of short side chain methacrylate.This is mainly due to octadecyl methacrylate with long side chains has lower termination constants than those of short side chain methacrylate.The poly(octadecyl methacrylate)film has a water contact angle of103°,which is mainly due to low surface tension of the long alkyl side chain and rough surface formed by side chain crystallization.
作者
刘佳
朱冠南
李坚
汪称意
任强
赵靓
张泽栋
LIU Jia;ZHU Guan-nan;LI Jian;WANG Cheng-yi;REN Qiang;ZHAO Liang;ZHANG Ze-dong(Jiangsu Key Laboratory of Environmental Friendly Polymer Materials,Faculty of Materials Science and Engineering, Changzhou University, Changzhou 213164, China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2018年第6期1365-1373,共9页
Journal of Chemical Engineering of Chinese Universities
关键词
甲基丙烯酸十八烷基酯
电子转移再生催化剂原子转移自由基聚合
疏水
接触角
octadecyl methacrylate
activator regenerated by electron transfer atom transfer radical polymerization
hydrophobicity
water contact angle
