scholarly journals Evaluation of Lignin-Calcium Complex as Thermal Stabilizer for Poly Vinyl Chloride

2011 ◽  
Vol 02 (06) ◽  
pp. 692-699 ◽  
Author(s):  
Hussein Ali Shnawa
Keyword(s):  
Vinyl Chloride ◽  
Thermal Stabilizer ◽  
Poly Vinyl Chloride

scholarly journals Using Methacryl-Polyhedral Oligomeric Silsesquioxane as the Thermal Stabilizer and Plasticizer in Poly(vinyl chloride) Nanocomposites

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1711 ◽  
Author(s):  
Yu-Kai Wang ◽  
Fang-Chang Tsai ◽  
Chao-Chen Ma ◽  
Min-Ling Wang ◽  
Shiao-Wei Kuo
Keyword(s):  
Thermal Decomposition ◽  
Tensile Strength ◽  
Thermal Annealing ◽  
Vinyl Chloride ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Tensile Tests ◽  
Binary Blend ◽  
Thermal Stabilizer ◽  
Poly Vinyl Chloride ◽  
Oligomeric Silsesquioxane

In this study, we investigated the influence of methacryl-functionalized polyhedral oligomeric silsesquioxane (MA-POSS) nanoparticles as a plasticizer and thermal stabilizer for a poly(vinyl chloride) (PVC) homopolymer and for a poly(vinyl chloride)/dissononyl cyclohexane-1,2-dicarboxylate (PVC/DINCH) binary blend system. The PVC and the PVC/DINCH blend both became flexible, with decreases in their glass transition temperatures and increases in their thermal decomposition temperatures, upon an increase in MA-POSS content, the result of hydrogen bonding between the C=O groups of MA-POSS and the H–CCl units of the PVC, as determined using infrared spectroscopy. Furthermore, the first thermal decomposition temperature of the pure PVC, due to the emission of HCl, increased from 290 to 306 °C, that is, the MA-POSS nanoparticles had a retarding effect on the decomposition of the PVC matrix. In tensile tests, all the PVC/DINCH/MA-POSS ternary blends were transparent and displayed flexibility, but their modulus and tensile strength both decreased, while their elongation properties increased, upon an increase in MA-POSS concentration, both before and after thermal annealing. In contrast, the elongation decreased, but the modulus and tensile strength increased, after thermal annealing at 100 °C for 7 days.

scholarly journals Synthesis, characterization and Stydy thermal stabilization effect of calcium complex of anthocyanin on the poly (vinyl chloride)

2021 ◽  
Vol 2063 (1) ◽  
pp. 012005
Author(s):  
Hikmat A Ali ◽  
Hussein A Shnawa ◽  
Dhiaa A Abidalimam
Keyword(s):  
Thermal Degradation ◽  
Vinyl Chloride ◽  
Thermal Stabilization ◽  
Mixing Ratio ◽  
Scanning Calorimetry ◽  
Thermal Stabilizer ◽  
Poly Vinyl Chloride ◽  
Stabilization Effect ◽  
Degradation Reaction ◽  
Dehydrochlorination Reaction

Abstract In this study, calcium complex of anthocyanin was synthesized from anthocyanin, a flavonoid type natural phenolic product, which was extracted from eggplant peel. The structure of Ca-anthocyanin was characterized by FTIR spectroscopy. Its efficiency as bio-based thermal stabilizer to stabilize poly (vinyl chloride) was investigated and compared to that of Reapak B-NT/7060, a Ca/Zn-based commercial stabilizer. The influence of Ca-anthocyanin complex on the thermal degradation reaction of PVC was monitored by differential scanning calorimetry (DSC). The results indicated that the Ca-anthocyanin complex is an efficient thermal stabilizer and it reduces the rate of dehydrochlorination reaction of PVC already at a concentration as small as 2 phr, part per hundred of PVC resin. The thermal degradation reaction of PVC through the first degradation stage is clearly limited by the addition of Ca-anthocyanin complex as single (primary) stabilizer. Its efficiency is similar to that of Reapak B-NT/7060 used as reference stabilizer and it can enhance the performance of commercial stabilizer when used as co-stabilizer at mixing ratio (1:1). This study has allowed verifying and validating the usefulness of environmental friendly thermal stabilizer for PVC with very evident stabilization effect.

Highly efficient and antibacterial zinc norfloxacin thermal stabilizer for poly(vinyl chloride)

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 97491-97502 ◽  
Author(s):  
Yanqin Shi ◽  
Si Chen ◽  
Meng Ma ◽  
Bozhen Wu ◽  
Jie Ying ◽  
...  
Keyword(s):  
Vinyl Chloride ◽  
Congo Red ◽  
Inhibition Zone ◽  
Visible Spectroscopy ◽  
Thermal Stabilizer ◽  
Highly Efficient ◽  
Poly Vinyl Chloride ◽  
Congo Red Test

A novel, highly efficient, antibacterial multifunctional thermal stabilizer, zinc norfloxacin (ZnNo2) for PVC was prepared, and studied by Congo red test, discoloration, dehydrochlorination test, visible spectroscopy and inhibition zone test.

Sign in / Sign up

Export Citation Format

Share Document