STUDY ON THE POLYMER LAYERED SILICA NANOCOMPOSITES OF A FEW TYPICAL HIGH PERFORMANCE PLASTIC RESINS

LJiankun; QIN Ming; KE Yucai; QI Zongneng; YI Xiaosu

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STUDY ON THE POLYMER LAYERED SILICA NANOCOMPOSITES OF A FEW TYPICAL HIGH PERFORMANCE PLASTIC RESINS

Research Article | 更新时间：2021-03-19

- STUDY ON THE POLYMER LAYERED SILICA NANOCOMPOSITES OF A FEW TYPICAL HIGH PERFORMANCE PLASTIC RESINS
- Acta Polymerica Sinica Issue 1, Pages: 73-77(2002)
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- Published：20 February 2002，
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LJiankun, QIN Ming, KE Yucai, QI Zongneng, YI Xiaosu. STUDY ON THE POLYMER LAYERED SILICA NANOCOMPOSITES OF A FEW TYPICAL HIGH PERFORMANCE PLASTIC RESINS. [J]. Acta Polymerica Sinica (1):73-77(2002)
DOI：

LJiankun, QIN Ming, KE Yucai, QI Zongneng, YI Xiaosu. STUDY ON THE POLYMER LAYERED SILICA NANOCOMPOSITES OF A FEW TYPICAL HIGH PERFORMANCE PLASTIC RESINS. [J]. Acta Polymerica Sinica (1):73-77(2002) DOI：

摘要

研究了PEK-C

PES

PEI和PSU 4种刚性分子链高性能热塑性树脂与蒙脱土插层复合的行为

结果表明通过溶液混合PEK-C和PES很容易插入到粘土层间并使粘土剥离

得到剥离型纳米复合材料

而PEI和PSU不能插入到粘土层间

分析认为插层能力的差异是由于它们与粘土间的作用力不同导致的.PEK-C和PES与粘土形成纳米复合材料后

玻璃化温度大幅度下降

但热分解温度有很大提高

认为是由于体积很大而且刚硬的聚合物分子与粘土片层混合后形成了较大的自由体积

使玻璃化温度下降

但聚合物端基与粘土间很强的作用力使它的热解温度提高 .PEI和PSU与粘土复合后热性能没有明显变化

说明如果粘土与聚合物间不能形成纳米复合

不会对聚合物性能产生显著影响.

Abstract

High performance plastic resins PEK-C

PES

PEI and PSU were mixed with organoclay CH3(CH2)17 (CH3)3N3+-Montmorillonite in solution．The XRD results revealed that the PEK-C and PES were very easy to intercalate into the clay and drove the clay to exfoliate

as a result

exfoliated polymer／clay nanocomposites were obtained．On the contray

PEI and PSU could not intercalate into the clay．The possible reasons caused these different results might be that the interaction between the former two polymers and clay were strong while the interaction between the latter two polymers and clay were weak．The Tgs of PEK-C／clay and PES／clay nanocomposites were 210℃ and 229℃

much lower than that of pure PEK-C and PES

which were 227℃ and 237℃

respectively．But the decomposing temperatures Td of PEK-C and PES rose from 469℃ to 507℃ and from 514℃ to 579℃ after mixed with clay

increased 38℃ and 65℃

respectively．For the polymer PEI and PSU

which could not intercalate into the clay

both their Tg and Td changed little after mixed with the clay．The positron annihilation life time spectroscopy results indicated that larger free volumes formed as PEK-C combined with clay

which was supposed to be responsible for the decreases of its Tg．

关键词

高性能热塑性树脂粘土纳米复合插层

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