Effect of poly(epichlorohydrin) on the thermal and mechanical properties of poly(vinyl chloride)

Abstract

Five kinds of polyepichlorohydrin (PECH) of different molecular weights were synthesized and characterized by gel permeation chromatography (GPC). Mechanical blending was used to mix PECH and poly(vinyl chloride) (PVC) together. The blends of different PVC/ PECH ratios were characterized by thermogravimetric analysis (TGA), tensile tests, differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). TGA results show the thermal stability of PVC/PECH blends is desirable. Tensile tests indicate elongation at break is raised by increasing both the amount and the molecular weight of PECH. DSC is used to determine the glass transition temperature of PECH, and a quite low T g is obtained. DMA results indicate that PECH has a perfect compatibility with PVC, when PECH concentration is below 20 wt %. There is only one peak in each tan d curve, and the corresponding T g decreases as PECH amount increases. However, above 20 wt %, phase separation takes place. The molecular weight of PECH also has a great influence on the glass transition temperature of the blends. This study shows that PECH is an excellent plasticizer for PVC, and one can tailor the glass transition temperature and tensile properties by changing the amount and the molecular weight of PECH.

“Pillaring Effects” in Cross-Linked Cellulose Biopolymers: A Study of Structure and Properties

“…Scheme S1 in SI). The formation of an EP oligomer agrees with the lower decomposition temperature of CLE-0.5 and corresponds to a thermal event observed for an EP-based homopolymer [46].…”

Optimization of fusion behavior of the nanocomposites based on poly(vinyl chloride)/poly(epichlorohydrin‐co‐ethylene oxide)/organoclay

“…Although structures of the PVC and ECO are somewhat similar, but there is a miscibility range for the blends composed of these components. Ren et al investigated different properties of the PVC/poly(epichlorohydrin) (with M w = 2000–4000 g/mol) blends and observed that addition of more than 20 wt% of poly(epichlorohydrin) results in phase separation. In addition, as molecular weight of the rubber increases, compatibility between phases decreases.…”

Synthesis and characterization of comb-type graft copolymers by redox polymerization and "click" chemistry method

“…3). Tg values were reported in the literatures for homo PECH and homo PMMA as − 43 °C [36] and 105 °C [37], respectively. Tg value of the comb-type graft copolymer changed to the value which was less than the value of PMMA because of PECH segment.…”