Synthesis and characterization of resol type phenolic resin/layered silicate nanocomposites
Synthesis and characterization of resol type phenolic resin/layered silicate nanocomposites
复制标题
DOI：
10.1021/cm0102685
复制
发表时间：
2001-11-01
影响因子：
8.6
通讯作者：
Chung, IJ
中科院分区：
文献类型：
--
作者：
Byun, HY;Choi, MH;Chung, IJ
通过熔融插层使用各种层状硅酸盐如钠蒙脱土（MMT）和ω-氨基酸改性的蒙脱土（C3 M、C6 M和C12 M）制备甲阶酚醛树脂/层状硅酸盐纳米复合材料（RPLSNs）。由于具有许多羟甲基的甲阶酚醛树脂（KL）的初始亲水性，最亲水的MMT在固化开始时与甲阶酚醛树脂（KL）最相容。然而，在固化过程中，HL脱嵌出的蒙脱土的extragallery，因为HL失去了亲水性的羟甲基基团的消耗。结果表明，在整个硫化过程中，C6 M与KL的相容性最好。KLC 6 M体系具有最佳的力学性能，这是由于C6 M的有机改性剂（羧酸）与KL的羟甲基之间反应形成的端栓结构以及硅酸盐层的优异分散性。RPLSN具有与纯酚醛树脂相似的热稳定性。
Resol type phenolic resin/layered silicate nanocomposites (RPLSNs) are prepared by melt intercalation using various layered silicates such as sodium montmorillonite (MMT) and omega -amino acid modified montmorillonites (C3M, C6M, and C12M). The most hydrophilic MMT is the most compatible with the resol type phenolic resin (KL) at the beginning of cure due to the initial hydrophilicity of KL with many methylol groups. However, HL is deintercalated out of extragallery of MMT during the cure since the HL lose hydrophilicity by the depletion of methylol groups. It is found that the C6M has the best miscibility with KL at the entire cure stage. The KLC6M system has the best mechanical properties, due to the end-tethered structure formed by the reaction between the organic modifier (carboxylic acid) of C6M and the methylol group of KL, as well as the excellent dispersion of silicate layers. RPLSNs have similar thermal stability to the neat phenolic resin.