Effect of poly(vinyl chloride)/chlorinated polyethylene blend composition on thermal stability

Abstract

Blends of poly(vinyl chloride) (PVC) with different ratios of chlorinated polyethylene (CPE) were degradated by the thermogravimetric method under dynamic conditions (50–600°C) in an inert atmosphere. The effect of the miscibility and composition of the PVC/CPE blends on the thermal stability were investigated. DSC curves of the blends show neither a shift of the PVC glass transition temperature nor a shift of the CPE melting temperature, which means that these blends are heterogeneous. The characteristics of the TG curves were determined, some of which (T1%,T5%, Δm1) can be used as indicators of the thermal stability of the blend. The apparent activation energy of PVC dehydrochlorination in the blends was also calculated. Comparison of the experimental TG curves and TG curves predicted by the additivity rule indicates the existence of the components' interaction in the PVC/CPE blends. The addition of CPE improves the thermal stability of PVC for all the investigated blends in the temperature range where αcalc is greater than αexp. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 166–172, 2000

Toughening modification of poly(vinyl chloride)/ α-methylstyrene-acrylonitrile-butadiene-styrene copolymer blends via adding chlorinated polyethylene

“…The second and the third step occur in the temperature range of 369–444°C and 444–500°C, respectively. The former is corresponded to the degradation of AMS‐ABS and the latter is attributed to the elimination of low molecular weight hydrocarbons from the polyenes residue . In addition, as seen in the DTG curves, the temperature at the first peak is shifted to higher values combined with lower maximal rate of degradation (height of the peak) as the content of CPE increases.…”

“…These results are expected, since CPE exhibits a higher thermal stability than PVC. Similar to PVC, the dehydrochlorination is also the dominant reaction in the CPE degradation . However, PVC exhibits a fast zipper dehydrochlorination, while the dehydrochlorination of CPE is a slow elimination of random chlorine and occurs at a relatively higher temperature .…”

Room temperature and low temperature toughness improvement in SAN/ASA blends by blending with CPE, HNBR, and BR

“…Hydrogenated nitrile butadiene rubber (HNBR) and chlorinated polyethylene (CPE) are both special rubbers with many brilliant properties, e.g., aging resistance, thermal stability, oil resistance, and so on. They have excellent toughening effect in many polymer matrix, such as SAN, nylon, and PVC, etc. In our previous works, the toughening effect of CPE and HNBR in SAN/ASA blends has been studied, respectively.…”

An anti-biodegradable hydrophobic sulfonate-based acrylamide copolymer containing 2,4-dichlorophenoxy for enhanced oil recovery

“…Bao et al found that the HPAM removal efficiency of 36.3% was obtained within the 7 d period when HPAM served as a sole nitrogen source. [31][32][33][34] In this work, N-allyl-2-(2,4-dichlorophenoxy) acetamide (DCAP) as a functionalized hydrophobic monomer was copolymerized with sodium 3-(allyloxy)-2-hydroxypropane-1-sulfonate (APS), acrylamide (AM) and acrylic acid (AA). and Flavobacterium.…”