2. Experimental2.1. MaterialsCellulose acetate (CA, Mw = 30,000 g/mol, 39.8 wt.% of acetylcontent), 1-butyl-3-methylimidazolium chloride (BMIMCl, purity≥95%) and diethyl phthalate (DEP, purity ∼99.5%) were obtainedfrom Aldrich.Formulas of CA, BMIMCl and DEP are presented in Fig. 1.2.2. Melting process2.2.1. Micro-compounderBlends of CA and plasticizers (BMIMCl and DEP) were preparedby melt processing methods. This process was performed in themicro-compounder allowing the preparation of small batches ofsamples (