Synthesis and evaluation of poly(dioctyltin maleate‐styrene‐methyl acrylate) as a stabilizer for poly(vinyl chloride)

Abstract

A novel thermal stabilizer poly(dioctyltin maleate-styrene-methyl acrylate) [P(DOTM-St-MA)] was synthesized by radical solution polymerization with benzene as the solvent and 2,2-azobisisobutyronitrile as the initiator. The structure of terpolymer was characterized by FTIR and 1 H-NMR spectra, and thermal stability of the stabilizer was measured by thermogravimetric analysis (TGA). Evaluation of [P(DOTM-St-MA)] as thermal stabilizer for poly(vinyl chloride) (PVC) was measured by acidimeter, and the extent of changing color of PVC was measured by thermal aging method. Compatibilities of four stabilizers with PVC were characterized by scanning electron microscope (SEM). The results showed that, with the same tin content in PVC mixtures, [P(DOTM-St-MA)] exhibited better performance as a PVC stabilizer compared with other stabilizers, such as poly(dibutylin maleate-styrene-methyl acrylate), DOTM, and dibutylin maleate (DBTM). Furthermore, [P(DOTM-St-MA)] had better compatibility with PVC in PVC processing.

Principles of Stabilization

“…252 Combination of zinc and tin stabilizers gives stable liquid stabilizers. 255 It has better stabilizing efficiency than poly(dibutyltin maleate-styrenemethyl acrylate) and dibutyltin maleate (DBTM). 254 Poly(dioctyltin maleate-styrene-methyl acrylate) was synthesized by radical solution polymerization.…”

“…253 Various other solvents, such alcohols and phenols are added in order to prevent tin stabilizers from precipitation. 255 It also has better compatibility with polymer in PVC processing. 255 It has better stabilizing efficiency than poly(dibutyltin maleate-styrenemethyl acrylate) and dibutyltin maleate (DBTM).…”

“…254 Poly(dioctyltin maleate-styrene-methyl acrylate) was synthesized by radical solution polymerization. 255 Alkyltin sulfanyl diester thiols that have from one to three terminal thiol groups are suitable for thermal stabilization of PVC, compositions. 255 It also has better compatibility with polymer in PVC processing.…”

Insights into the use of zinc–mannitol alkoxide as a novel thermal stabilizer for rigid poly(vinyl chloride)

“…Various methods have been tried to solve this problem, among which the addition of different thermal stabilizers is the most efficient and practical, and thus, further degradation is prohibited . During past decades, organic tin, lead salts, metal soaps, and liquid mixed metal stabilizers have been developed and have served as thermal stability additives for PVC . The principal function of these stabilizers is to neutralize the hydrochloric acid (HCl) evolved from the dehydrochlorination reaction of this polymer or replace the unstable chlorine atoms, such as the allyl chlorine atoms in PVC chains .…”

Preparation and evaluation of some benzophenone terpolymers as photostabilizers for rigid PVC

“…Salicylates, hydroxybenzophenones, and benzotriazole derivatives are used as commercial photostabilizers. Some scientists were directed to synthesize a new terpolymer, namely, poly[(dioctyltin maleate)/styrene/(methyl acrylate)] to be used as a novel thermal stabilizer for PVC [9]. Methacrylate‐based copolymers with 2‐hydroxyethyl methacrylate and 2,3‐epoxypropyl methacrylate were synthesized and investigated as costabilizers for PVC by Braun et al [10].…”