Nanoincorporation of layered double hydroxides into miscible polymer blends of cellulose acetate

CELL 22

Sachi Yoshitake, r_kusumi@kais.kyoto-u.ac.jp, Ryosuke Kusumi, r_kusumi@kais.kyoto-u.ac.jp, and Yoshiyuki Nishio, ynishio@kais.kyoto-u.ac.jp. Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
Miscibility characterization of poly(acryloyl morpholine)/cellulose acetate (PACMO/CA) blends was carried out by DSC and solid-state 13C NMR spectroscopy. It was verified that CA (DS = 1.77 - 2.95) and PACMO can form an amorphous monophase homogeneous within limits of <2.5 nm at any binary composition. Layered double hydroxides (LDHs) of Al/Mg were modified by different ionic oligomers, and an attempt was made to incorporate the respective organophilic LDHs into blend films of the miscible PACMO/CA pair, via bulk polymerization of an ACMO monomer/organo-LDH mixture and then blending CA with the polymer-inorganic hybrid precursor. Particularly 12-hydroxystearic acid-modified LDH was well exfoliated and dispersed in the PACMO/CA matrix on a scale in thickness of less than a few tens of nanometers. This gave rise to a successful reinforcement effect leading to the improvement in viscoelastic property of the polymer blends at elevated temperatures.
 

Structure and Properties of Cellulosic Polymers, Assemblies, and Nanocomposites
1:00 PM-4:45 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. R07, Oral

Division of Cellulose & Renewable Materials

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008