FTIR and TGA studies of poly(4-vinylpyridine-co-divinylbenzene)–Cu(II) complex
FTIR and TGA studies of poly(4-vinylpyridine-co-divinylbenzene)–Cu(II) complex
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DOI：
10.1016/s0141-3910(02)00261-6
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发表时间：
2003
影响因子：
5.9
通讯作者：
K. Wu;Y. R. Wang;W. Hwu
中科院分区：
文献类型：
--
作者：
K. Wu;Y. R. Wang;W. Hwu
采用红外光谱（IR）、差示扫描量热法（DSC）和热重分析（TGA）研究了聚（4-乙烯基吡啶-co-二乙烯基苯）-Cu（II）配合物的相互作用和热行为。通过FTIR差谱和去卷积谱估计了吡啶环与Cu ~（2+）相互作用对PVP-DVB-Cu（II）配合物运动和偶极矩的影响。吡啶环的运动随Cu ~（2+）含量的增加而减小，而面内和面外环C-H弯曲的偶极矩则增加。PVP-DVB-Cu（II）配合物的玻璃化转变温度（Tg）值高于PVP-DVB共聚物的玻璃化转变温度（Tg）值，且随Cu 2+离子含量的增加而增加。空气中PVP聚合物链无规断裂的表观活化能（Ea）为187 kJ/mol，高于共聚物（120 kJ/mol）。热氧化降解（>400 °C）的Ea值随Cu ~（2+）含量的增加而降低。
The interaction and thermal behavior of the poly(4-vinylpyridine-co-divinylbenzene)–Cu(II) complex were studied using infrared (IR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The effect of pyridine ring–Cu2+interaction on the motion and dipole moments of the PVP–DVB–Cu(II) complexes was estimated through the FTIR difference and deconvoluted spectra. The pyridine ring motion decreased with increasing Cu2+ions content, whereas the dipole moments of the in-plane and out-of-plane ring C–H bending increased. The glass transition temperature (Tg) value of the PVP–DVB–Cu(II) complex was higher than that of the PVP–DVB copolymer, and increased with increasing Cu2+ions content. The apparent activation energy (Ea) of the random scission within the PVP polymer chain in complex under air (∼187 kJ/mol) was higher than that in copolymer (120 kJ/mol). However, the value of Eafor the thermo-oxidative degradation (>400 °C) decreased with increasing Cu2+ions content.