A novel evaluation method for dehydrochlorination of plasticized <scp>Poly(vinyl chloride)</scp> containing heavy metal‐free thermal stabilizing synergistic agent

Al-Mosawi, Ali I.

doi:10.1002/pat.5339

Cited by 7 publications

(5 citation statements)

References 19 publications

(22 reference statements)

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“…Fig. 4 shows that the thermal decomposition behavior of all PVC materials can be divided into two stages in good agreement with previously reported results [23,24]. The first stage (200-400°C) is mainly attributed to the release of hydrogen chloride leading to the generation of conjugated polyene structures.…”

Section: Thermal Stability Evaluated By Tgasupporting

confidence: 89%

The Promoting Effect of Multifunctional Groups on the Thermal and Mechanical Properties of PVC Materials

Wang¹,

Fan²,

Song³

et al. 2023

Journal of Renewable Materials

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The development of PVC materials grafted with mannich base originated from myrcene (P-MAM-g, where the mannich base derived from myrcene is abbreviated as MAM) via green and effective synthetic methods is a good strategy to avoid unacceptable discoloration and deterioration of thermal and mechanical properties caused by autocatalytic dehydrochlorination (DHC) during PVC processing. In this study, MAM with double bonds, amino groups, ester groups, and phospholipid groups was introduced into the chains of PVC to improve the thermal stability of PVC. The experimental results showed that the covalent attachment of MAM to PVC enhanced both the initial and the long-term stability of PVC. The enhanced performance of P-MAM-g compared with unmodified PVC is attributed to the simultaneous introduction of double bonds and amino groups into the PVC structure. The double bonds trapped the unstable chlorine atoms originated from the degradation of the PVC chain and reacted with the labile macromolecular radicals originated from PVC, thus inhibiting the radical degradation of the PVC chain. Furthermore, the amino groups absorbed the HCl produced in the degradation of PVC, inhibiting the adverse effects of HCl. P-MAM-g displayed better intrinsic flexibility and anti-migration ability of organic functional components compared with the control PVC materials. A possible stabilizing mechanism of the P-MAM-g was also presented.

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Section: Thermal Stability Evaluated By Tgasupporting

confidence: 89%

The Promoting Effect of Multifunctional Groups on the Thermal and Mechanical Properties of PVC Materials

Wang¹,

Fan²,

Song³

et al. 2023

Journal of Renewable Materials

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“…4 . The shape of the conductivity versus time graphs obtained does not differ from typical dehydrochlorination curves as presented in the literature [ 70 , 71 ]. Initially, the conductivity of water remains stable at its initial value.…”

Section: Resultssupporting

confidence: 64%

Preparing epoxidized vegetable oil from waste generated by the kapok fiber industry and assessing its thermal stabilization effect as a co-stabilizer for polyvinyl chloride

Putrawan,

Azharuddin,

Jumrawati

2023

Heliyon

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“…Therefore, this method can characterize the entire thermal degradation process of PVC. According to the formula of [HCl], equation (1) can be obtained from reference [31]: ( )…”

Section: Conversion Between Conductivity and Concentration Of Dehydro...mentioning

confidence: 99%

Dehydrochlorination study of plasticized poly(vinyl chloride) contianing modified titanium dioxide, cerium stearate, organotin and β-diketone complex after long-term storage

Chen

et al. 2022

Mater. Res. Express

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Understanding the influence of additives on the dehydrochlorination of plasticized poly(vinyl chloride) (PVC) from the source and long-term storage is an attractive topic. In this work, the effects of folic acid modified nano titanium dioxide (FANT)、cerium stearate, organotin and β -diketone compound additives on the dehydrochlorination of plasticized PVC and long-term storage were investigated using conductivity measurements. The results showed that the induction time of hydrogen chloride removal of plasticized PVC (C-1) containing composite stabilizer at 200°C were 243% higher than those of the control (S1). After storage, the heat stability of the control decreased significantly. Instead, the induction time and stability time of plasticized PVC containing FANT, cerium stearate, organotin and β- diketone composites were significantly enhanced at 200°C. The thermal stability sequence from difficult to easy for removal of hydrogen chloride was : 3.0 phr (1.90% wt) (C2) >1.0 phr (0.64% wt) (C1) > 5.0 phr (3.17% wt) (C3) with FANT. It is inferred that this is due to the FANT's hydrogen bonding van der Waals force and the complexation reaction of variable valence metal Ce+3/Ce+4 with C-Cl bond in PVC polymer molecule. The induction time (min) of hydrogen chloride removal at 200°C before and after storage is as follows: C-20 (71.9) > C-10 (70.6) > C-1 (60.7) > C-3 (57.2) > C-30 (52.7) > C-2 (49.9) > S1 (25.3) > S10 (19.7). The critical temperature for hydrogen chloride removal by the composite film is around 210°C. If the content of FANT increased to 3.17%, the intermolecular force and repulsive force in PVC system offset each other, indicating that the increase of FANT content will lead to the increase of repulsive force with PVC. A certain amount of FANT, cerium stearate, organotin and β- diketone composites has a significant synergistic effect on the thermal stability of PVC.

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A novel evaluation method for dehydrochlorination of plasticized Poly(vinyl chloride) containing heavy metal‐free thermal stabilizing synergistic agent

Cited by 7 publications

References 19 publications

The Promoting Effect of Multifunctional Groups on the Thermal and Mechanical Properties of PVC Materials

The Promoting Effect of Multifunctional Groups on the Thermal and Mechanical Properties of PVC Materials

Preparing epoxidized vegetable oil from waste generated by the kapok fiber industry and assessing its thermal stabilization effect as a co-stabilizer for polyvinyl chloride

Dehydrochlorination study of plasticized poly(vinyl chloride) contianing modified titanium dioxide, cerium stearate, organotin and β-diketone complex after long-term storage

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