Measuring the heat stability of PVC by dehydrochlorination

Taubinger, R. P.; Allsopp, M. W.; Loo, H. J. M. Van Der; Mooij, Jan

doi:10.1016/0142-9418(86)90039-5

Cited by 9 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…And the curve slope is very sharp (high inclination). While for the results obtained in the standard method shown in Figure 6, which depends on measuring the conductivity, we note that the induction time and stability time were short, and their values ranged between 0.45 and 0.59 hour, respectively, which means that the thermal stability of PVC is significantly reduced at high temperatures 20,21 …”

Section: Resultsmentioning

confidence: 91%

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

Al-Mosawi

2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

A novel method for determining the level of dehydrochlorination, that is, the conversion of degradation from the conductivity curve of plasticized Poly(vinyl chloride) (PVC) containing heavy metal‐free agent, has been used. The novel method was introduced in this article to evaluate the thermal stability of PVC by dehydrochlorination that shows more reproducibility for measured results than the standard method, which depends on the conductivity only. The novel method was used to measure thermal degradation in a new generation of thermal stabilizing heavy metal‐free additive added to plasticized PVC, which is Oxydtron (a nanocement additive). Plasticized PVC containing Oxydtron is our new candidate to replace conventional stabilizers or at least increase their efficiency. The primary use of this new material is in the cable grade industry and construction applications. The basic principle of our novel method is based on converting the conductivity data obtained by the conventional or standard method to HCl concentration. The data analysis graph will have two curves instead of the one conductivity curve, representing the conversion and HCl concentration. In this study, a comparison was made between the results of the novel method with the results obtained from the conventional or standard method. In contrast to the standard method, it describes better the process, particularly in the case of PVC compounds. This method's designed computer program shows a good agreement with the discoloration and initial color changes.

show abstract

Section: Resultsmentioning

confidence: 91%

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

Al-Mosawi

2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…[43][44][45][46] The high inclination of the pure poly(vinyl chloride) curve (black) shown in Figure 6 refers to the fact that the loss of HCl is rapid because poly(vinyl chloride) has poor thermal resistance at high temperatures, resulting in the formation of allylic chloride groups in the structural segments of poly(vinyl chloride). [47][48][49] After adding artificial silicate, the dehydrochlorination behavior of poly(vinyl chloride) has been changed, where the structure of poly(vinyl chloride) demonstrating greater stability at elevated temperatures, as shown in the green, red, and blue curves within Figure 8, which represent 1wt%, 3wt.%, and 5wt.% of artificial silicate additives, respectively. This indicates that the HCl release has been reduced due to the poly(vinyl chloride) structure being more stable.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of thermal characteristics of flexible poly(vinyl chloride) for automotive applications by using environmentally friendly heavy metal-free modifier

Al-Mosawi

Abdulsada

2022

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

This work intends to develop an effective heavy metal-free modifier having properties comparable to traditional stabilizers and flame retardants, simultaneously being environmentally friendly and may be superior in many aspects. The important requirement focused on is: how to increase thermal stability and flame retardancy of flexible poly(vinyl chloride). Due to the typical materials now used with poly(vinyl chloride), which increases health and environmental concerns, utilizing a novel heavy metal-free additive will make poly(vinyl chloride) substantially safer. We have used an artificial silicate for this aim, which proved to be an efficient flame retardant and surprisingly showed excellent heat stabilizing effect. Thermal stability of flexible poly(vinyl chloride) was tested by both discoloration and hydrochloric-acid release methods. Fire properties were tested by limiting oxygen index (L.O.I) method. And penetration resistance of poly(vinyl chloride) has been tested by vicat test. The improvement rate in the thermal stability time during the dehydrochlorination test was 110.7% at 160°C and 90.1% at 180°C. Also, the improvement rate in the L.O.I test was 22.2%, which increased from 21.6% for the poly(vinyl chloride) to 26.4% when 5wt.% of artificial silicate was added. The artificial silicate also increases the thermal stability of the poly(vinyl chloride) and maintains its appearance of more saturated chromatic saturated (brighter). In addition, artificial silicate increases the resistance to hot penetration of poly(vinyl chloride). Where the resistance of poly(vinyl chloride) increased by 8.9% after adding 5wt.% of artificial silicate.

show abstract

“…As PVC decomposition generates hydrochloric acid gas, this gas will be transported by the carrier gas into the water. The hydrochloric acid dissolves in the water, resulting in a rise of conductivity [151] (Fig. 1.18).…”

Section: 771■ Static Thermostabilitymentioning

confidence: 98%

PVC Stabilizers

Schiller¹

2015

PVC Additives

View full text Add to dashboard Cite

Measuring the heat stability of PVC by dehydrochlorination

Cited by 9 publications

References 0 publications

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

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

Enhancement of thermal characteristics of flexible poly(vinyl chloride) for automotive applications by using environmentally friendly heavy metal-free modifier

PVC Stabilizers

Contact Info

Product

Resources

About