New insights into the degradation mechanism of poly (vinyl chloride), Part (III): Implementation of new costabilizers-Towards heavy metal free systems (HMFS)

2005 ◽  
Vol 96 (1) ◽  
pp. 122-143 ◽  
Author(s):  
E. Santamaría ◽  
M. Edge ◽  
N. S. Allen ◽  
H. B. Harvey ◽  
M. Mellor ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Vinyl Chloride ◽  
Degradation Mechanism ◽  
Metal Free ◽  
Poly Vinyl Chloride

scholarly journals A new generation of cable grade poly(vinyl chloride) containing heavy metal free modifier

2021 ◽  
Vol 29 (1) ◽  
Author(s):  
Ali I.Al-Mosawi
Keyword(s):  
Heavy Metal ◽  
Vinyl Chloride ◽  
Thermal Gradient ◽  
Volume Resistivity ◽  
Capillary Rheometry ◽  
Limiting Oxygen Index ◽  
Metal Free ◽  
Extrusion Processing ◽  
Poly Vinyl Chloride ◽  
New Generation

AbstractMany additives are used to improve the performance of cables in terms of increasing their flame retardancy, thermal stability, thermal conductivity, and other characteristics. Unfortunately, most of these additives contain heavy metals. Therefore, the main objective of this study is to introduce a material representing a new generation of environmentally friendly heavy metal-free stabilizers for cable grade poly(vinyl chloride) that can compete with traditional materials in terms of performance and distinctive properties. This unique additive is Oxydtron, a synthetic silicate or simply nanocement. The tests performed are rheological properties represented by a capillary rheometry analysis, limiting oxygen index, and volume resistivity. The most significant improvement in Bagley correction measurements was 14.61%; 18.13%; and 27.20% more than poly(vinyl chloride) basic formulation when using 5wt.% Oxydtron at 160 °C, 170 °C, and 180 °C, respectively. Also, the mean increases in relaxation time were 3.200 times, 8.825 times, and 12.458 times more than poly(vinyl chloride) basic formulation with 1wt.%, 3wt.%, and 5wt.% of Oxydtron, respectively. Furthermore, the Oxydtron lowered the value of the accompanying thermal gradient of the L.O.I test, reducing the heat-affected zone. The best result was with the extrusion processing method due to the uniformity of the processing conditions. However, the thermal gradient analysis showed residual heat stress in the test samples after cutting the burning layer and re-testing the samples again; this causes them to burn faster. This situation requires caution for designs that are exposed to high temperatures without burning. The optimum improvement in volume resistivity value was 14.71% and 38.24% more than poly(vinyl chloride) basic formulation after adding 5wt.% and 7wt.% of Oxydtron, respectively.

The effect of (natural) polyols on the initial colour of heavy metal- and zinc-free poly(vinyl chloride)

2006 ◽  
Vol 91 (9) ◽  
pp. 2233-2240 ◽  
Author(s):  
Johan Steenwijk ◽  
Daan S. van Es ◽  
Jacco van Haveren ◽  
John W. Geus ◽  
Leonardus W. Jenneskens
Keyword(s):  
Heavy Metal ◽  
Vinyl Chloride ◽  
Poly Vinyl Chloride

The compatibility of (natural) polyols with heavy metal- and zinc-free poly(vinyl chloride): Their effect on rheology and implications for plate-out

2008 ◽  
Vol 93 (1) ◽  
pp. 50-58 ◽  
Author(s):  
Daan S. van Es ◽  
Johan Steenwijk ◽  
Guus E. Frissen ◽  
Hans C. van der Kolk ◽  
Jacco van Haveren ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Vinyl Chloride ◽  
Poly Vinyl Chloride

Molecular chain model construction, thermo-stability, and thermo-oxidative degradation mechanism of poly(vinyl chloride)

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 31898-31905 ◽  
Author(s):  
Jia Liu ◽  
Yin Lv ◽  
Zhidong Luo ◽  
Heyun Wang ◽  
Zhong Wei
Keyword(s):  
Vinyl Chloride ◽  
Functional Group ◽  
Degradation Mechanism ◽  
Oxidative Degradation ◽  
Chain Model ◽  
Poly Vinyl Chloride ◽  
Structure Degradation ◽  
Xps Characterization ◽  
Thermo Stability ◽  
Thermo Oxidative Degradation

With XPS characterization to determine the type of functional group, elucidates the hydro peroxide structure degradation mechanism of PVC.

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