Rheological properties of PVC stabilized with tannin based epoxy resin as non metallic thermal stabilizer

Shnawa, Hussein Ali; Jahani, Yousef; Khalaf, Moayad N.

doi:10.1007/s00289-016-1764-6

Cited by 13 publications

(11 citation statements)

References 13 publications

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“…Moreover, this chemical modified biopolymer reduces not only the hydrophilicity but also develops in some cases functional property. For example, tannin-based epoxy resin (with 5, 10 or 20 phr) can provide enhanced dynamic thermal and process stability and improved the rheological properties on PVC [26]; acetylated tannin or esterified tannin exhibited improved miscibility with hydrophobic plastic matrix (e.g., poly(butylene succinate), PP, aliphatic polyester, poly(lactic acid)), and UV stability [27,28,29]. The addition of compatibilizers is also an effective pathway to improve biopolymers and plastics matrix by the formation of bonds, maleic anhydride grafted polypropylene (MAPP) being one of the most important compatibilizers for a PP matrix due to the high reactivity of maleic anhydride [30,31].…”

Section: Introductionmentioning

confidence: 99%

Dynamically Cross-Linked Tannin as a Reinforcement of Polypropylene and UV Protection Properties

et al. 2019

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Tannins were used as reinforcing components for polypropylene with anti-UV properties via dynamic curing extrusion. The influence of cross-linked tannins in different weight fraction and their anti-UV capacity on morphological, mechanical, rheological, crystallize and thermal properties were studied. The experimental results indicated that the cross-linked tannins improve Young’s modulus, crystallinity, and thermal stability and reinforce the internal network of polypropylene. After UV accelerated weathering, polypropylene had fewer surface cracks, lower carbonyl index, fewer crystallinity decreases and less mechanical properties loss with increasing tannin content.

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Section: Introductionmentioning

confidence: 99%

Dynamically Cross-Linked Tannin as a Reinforcement of Polypropylene and UV Protection Properties

et al. 2019

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“…Carboxyl group has the ability to form zinc or calcium salts by an acid–base reaction, then the salts could react with unstable chlorine atoms in the PVC and stop dehydrochlorination . Epoxy group can react with HCl and double bonds in PVC to form a five‐membered ether ring . All these results provide us useful laws to design thermal stabilizers.…”

Section: Introductionmentioning

confidence: 90%

“…(8)], Moreover, anion in thermal stabilizers could absorb HCl by the dioxolan [eqs. (9) and (10)]. Therefore, the PVC stabilized with Ca(Oxo) 2 or Zn(Oxo) 2 have good tensile properties due to the chain extension function and thermal stability effect of Ca(Oxo) 2 or Zn(Oxo) 2 .…”

Section: M=zn or Camentioning

confidence: 99%

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Tensile properties, thermal stability, and the mechanism of PVC stabilized with zinc and calcium oxolinic complexes

Shi

Wang

et al. 2018

J of Applied Polymer Sci

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Two novel thermal stabilizers, zinc and calcium oxolinic complexes (Zn(Oxo)2 and Ca(Oxo)2), with superior tensile properties and notable thermal stability effect for polyvinyl chloride (PVC) are reported here. The complexes are synthesized without any organic solvents, and the structures are confirmed as Zn(C13H10NO5)2·H2O and Ca(C13H10NO5)2·3H2O by Fourier transform infrared spectroscopy, thermogravimetric analysis, X‐ray fluorescence spectrometry, and elemental analysis. The PVC samples stabilized with the complexes show superior tensile strength and elongation at break compared with zinc and calcium stearates by tensile test. The results of Congo red test, dehydrochlorination test, and discoloration test show that: (1) Zn(Oxo)2 is better than zinc stearate as thermal stabilizer for PVC; (2) Zn(Oxo)2 and Ca(Oxo)2 show notable synergistic effect with calcium stearate and zinc norfloxacin respectively. The mechanism of the superior tensile properties and notable thermal stability effect is due to the ability of the complexes to absorbing HCl and reacting with PVC chains, which result in the special chain extension of PVC and the delay of autocatalytic effect and zipper‐like dehydrochlorination. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47004.

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“…At present, there are five main kinds of PVC stabilizers, [ 3‐5 ] organic tin stabilizer, lead stabilizer, metal soap stabilizer, rare earth stabilizer, and organic assistant stabilizer. Lead stabilizer not only pollutes the environment but also causes certain harm to human body.…”

Section: Introductionmentioning

confidence: 99%

Study on the Use of Rare Earth Stabilizer as Poly(Vinyl Chloride) Stabilizer

Liu

Fan

Feng

et al. 2020

Vinyl Additive Technology

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Lanthanum aminobenzoate (LAB), cerium aminobenzoate (CAB), and lanthanum and cerium aminobenzoate (LCAB) were synthesized with p‐aminobenzoic acid, lanthanum nitrate, or cerium nitrate as raw materials to study the influence of different rare earth elements on the stability of rare earth stabilizers. The thermal stability of by CAB, LCAB, and LAB toward poly(vinyl chloride) (PVC) was studied. The results of Congo red test and thermal aging test showed when three rare earth stabilizers acted independently, the advantages and disadvantages of thermal stability are as follows: LAB > CAB > LCAB. However, in compound experiments, the thermal stability of composite stabilizers compounded by CAB or LCAB with zinc stearate, calcium stearate, or pentaerythritol (PE) was slightly better than that of composite stabilizers compounded by LAB. Among of them, when the compounding scheme was LCAB:zinc stearate:PE = 1:1:3, the thermal stability time reached 60 minutes; CAB:zinc stearate:PE = 1:1:3, the thermal stability time reached 50 minutes, compared with the rare earth stabilizer alone, the composite thermal stabilizer gave PVC samples better antidiscoloration performance and longer thermal stability time.

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Rheological properties of PVC stabilized with tannin based epoxy resin as non metallic thermal stabilizer

Cited by 13 publications

References 13 publications

Dynamically Cross-Linked Tannin as a Reinforcement of Polypropylene and UV Protection Properties

Dynamically Cross-Linked Tannin as a Reinforcement of Polypropylene and UV Protection Properties

Tensile properties, thermal stability, and the mechanism of PVC stabilized with zinc and calcium oxolinic complexes

Study on the Use of Rare Earth Stabilizer as Poly(Vinyl Chloride) Stabilizer

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