Polymer blends and composites

Abstract

In this chapter, first, the investigations of interpolymer interaction, miscibility, and composition change during phase separation for polymer blends are addressed. The hydrogen bonding between polymers is one of key interaction among the interpolymer interactions, causing the apparent lineshape change on 13 C NMR spectrum. Based on the effects of 1 H spin diffusion on 1 H spin-lattice relaxation T 1 , the miscibility on several nm or several tens of nm level is discussed. The close proximity between the component polymers revealed by two-dimensional 1 H- 1 H exchange NMR is shown. Similarly, the phase separation process is discussed by the 1 H spin diffusion behavior on T 1 . Second, the interaction between inorganic fillers and polymer and stability of the organic modifier treated on the clay surface for polymer nanocomposites are described. The interaction between filler surface and polymer is detected by two-dimensional heteronuclear correlation NMR measurement. The stability of the organic modifiers on the clay surface is clarified by the simple 1 H MAS spectra. The paramagnetic source naturally containing in clay obscures the NMR signal, but it is useful to evaluate the stability of the organic modifiers.