With the collaboration of Iran Polymer Society
Polyolefin degradation
Evaluation of effects of thymolphthalein on thermooxidative stability of polypropylene

Nikoo Karami; Reza Jahanmardi

Volume 4, Issue 1 , January 2017, , Pages 79-86

https://doi.org/10.22063/poj.2016.1394

Abstract
  The present work is aimed to find a new and efficient type of antioxidants for polypropylene. Hence, effects of 3,3-bis(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-2-benzofuran-1-one, generally known as thymolphthalein, on thermo-oxidative stability of polypropylene in solid and melt states were evaluated ...  Read More

Catalysis
In situ stabilization of polypropylene by lignin using a Ziegler-Natta catalyst

Maria Marques; Renato Oliveira; Rafael Araujo; Bruno Amantes

Volume 1, Issue 1 , January 2014, , Pages 17-24

https://doi.org/10.22063/poj.2014.889

Abstract
  A fourth-generation Ziegler-Natta catalyst was prepared to synthesize polypropylene (PP), which was stabilized by in situpolymerization employing lignin as antioxidant. The antioxidant properties of lignin were compared with those of the commercial antioxidant Irganox 1010. The presence of lignin in ...  Read More