Phosphate ester groups‐containing ricinoleic acid‐based Ca/Zn: Preparation and application as novel thermal stabilizer for PVC

Abstract

Phosphate ester groups containing ricinoleic acid‐based Ca/Zn (LPPRA‐Ca and LPPRA‐Zn) stabilizer was successfully synthesized from ricinoleic acid (RA) and used as thermal stabilizers for poly(vinyl chloride) (PVC). These thermal stabilizers were characterized by Fourier transform infrared spectrometry, 1H nuclear magnetic resonance, and inductively‐coupled plasma atomic emission spectroscopy. The effects of LPPRA‐Ca/LPPRA‐Zn, CaSt2/ZnSt2, and other stabilizers on the thermal stability of PVC were studied through Congo Red test, discoloration tests, thermogravimetric analysis (TGA), TGA–infrared, and TGA–mass spectrometry. The thermal stability tests show that LPPRA‐Ca/LPPRA‐Zn displays the best initial color stability and long‐term thermal stability for PVC. The superior performance is attributed to the synergistic effect of LPPRA‐Ca and LPPRA‐Zn. Moreover, a lower Zinc content of LPPRA‐Zn in PVC helps to decrease the “zipper dehydrochlorination” of the product, which contributes to a better initial thermal stability. Except for the better stabilization performance, LPPRA‐Ca/LPPRA‐Zn also displays better plasticization performance for PVC compared with other stabilizers. A possible stabilizing mechanism of PVC/LPPRA‐Ca/LPPRA‐Zn system was presented. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45940.

Facile Synthesis of Di-Mannitol Adipate Ester-Based Zinc Metal Alkoxide As Bi-Functional Additives for PVC

“…A number of new types of thermal stabilizers, for example, zinc and calcium salts of 11-maleimideoundecanoic acid, liquid Ca/Zn thermal stabilizer synthesized, zinc and calcium oxolinic complexes, ricinoleic acid-based Ca/Zn stabilizer, have been reported [11,13,[15][16][17][18][19] . Some researchers also indicated that polyols can serve as auxiliary thermal stabilizers.…”

Facile Synthesis of Di-Mannitol Adipate Ester-Based Zinc Metal Alkoxide as a Bi-Functional Additive for Poly(Vinyl Chloride)

“…A number of new types of thermal stabilizers, for example, zinc and calcium salts of 11-maleimideoundecanoic acid, synthesized liquid Ca/Zn thermal stabilizer, zinc and calcium oxolinic complexes, ricinoleic acid-based Ca/Zn stabilizer have been reported [11,13,15,16,17,18,19]. Some researchers also indicated that polyols can serve as auxiliary thermal stabilizers.…”

The thermal stabilization behavior and mechanism of a metal organic framework with high thermal stability towards PVC

“…According to previous reports, the phosphite auxiliary thermal stabilizers, such as TP, are capable of absorbing hydrogen chloride, replacing unstable chlorine atoms, inhibiting conjugated polyene sequence, and passivating the catalytic active sites of PVC degradation. 27 Therefore, TP is used together with Zn–Atz/CaSt 2 (1 : 1) to further optimize the initial and long-term thermal stability of PVC sample, as shown in Table 1. With the increase of TP content in the composite thermal stabilizer, the T s of the PVC/Zn–Atz/CaSt 2 /TP sample increases from 46.97 min to 66.17 min, and its initial coloring is significantly improved.…”