Thermal Decomposition of Cellulose/Synthetic Polymer Blends Containing Grafted Products IV. Cellulose/Poly(2-hydroxyethyl methacrylate) Blends

Abstract

ABSTRACT:Homogeneous grafting of 2-hydroxyethyl methacrylate onto cellulose was carried out in a dimethyl sulfoxidelparaformaldehyde solvent system. The grafted products were added to celluloselpoly(2-hydroxyethyl methacrylate) (PHEMA) blends as compatibilizers. The thermal decomposition behavior of the blends was investigated by thermogravimetry. The thermal stability of the blends decreased with an increase in grafted product content. Peak intensity of wide-angle X-ray diffraction patterns decreased with grafted product content. The microphase-separated structures of the blends became finer with grafted product content. Dynamic mechanical measurements were carried out to determine glass transition temperatures, T., of the blends. T• for cellulose decreased with grafted product content but that for PHEMA increased. Differences in thermal decomposition behavior of the blends were correlated to compatibility. Thermogravimetry was effective for compatibility estimation in celluloseiPHEMA blends containing grafted products.

Biocompatible Bacterial Cellulose-Poly(2-hydroxyethyl methacrylate) Nanocomposite Films

“…The mass loss at around 100°C is associated with the volatilization of residual water. PHEMA matrices are considerably less stable than BC since they start to decompose at around 200°C and presented a degradation profile with three main degradation steps at about 230, 290, and 400°C (Figure 8) [42]. The cross-linking of PHEMA with small amounts of PEGDA (up to 5%) had no measurable effect on the thermal stability of the polymer.…”

Thermal behavior of some homogeneously polymethyl methacrylate (PMMA)‐grafted high α‐cellulose products

“…Many workers investigated the thermal decomposition behavior of the grafted cellulose products. However, grafting reactions were carried out in heterogeneous3–6 and homogeneous reaction conditions and all the reported homogeneous reactions were investigated in solvent systems like dimethyl sulfoxide and paraformaldehyde (DMSO/PF) 7, 8, 11, 12. It was reported that crystallinity, crystal size, and degree of polymerization of cellulose greatly affect the pyrrolysis kinetics of high α‐cellulose,9, 10, 13 attributed to the synthetic polymer chains hindering the crystallization of cellulose chain.…”

Morphological and structural development of hardwood cellulose during mechanochemical pretreatment in solid state through pan-milling

“…There is only one peak representing the maximal weight loss rate in each curve. The DTG peak temperatures can be used as a measure of thermal stability (Nishioka et al 1999). As shown in Fig.…”