With the collaboration of Iran Polymer Society

Catalysis
Ti+4 determination in Ziegler–Natta polymerization catalysts via UV‒vis spectroscopy

Jonas B Biagini; Joao Henrique Zimnoch dos Santos

Articles in Press, Accepted Manuscript, Available Online from 04 July 2025

https://doi.org/10.22063/poj.2025.35671.1351

Abstract
  The determination of Ti+4 in Ziegler–Natta catalysts is highly relevant for industrial plants that use Ziegler–Natta (ZN) catalysts based on TiCl4 as a source of titanium. The catalyst preparation step requires analytical monitoring during the dilution process for the morphological effect ...  Read More

Polymer chemistry
Polyolefinic materials in packaging: Prospects and environmental threats: A comprehensive review

Anirban Bhar; Akshay Kumar Dey; Deepshikha Datta; Oliva Roy; Soumyadeep Routh; Arindam Mandal; Biswajit Kamila

Articles in Press, Accepted Manuscript, Available Online from 17 July 2025

https://doi.org/10.22063/poj.2025.35665.1350

Abstract
  The global packaging industry is primarily influenced by polyolefinic materials, such as polyethylene (PE) and polypropylene (PP), which offer a combination of durability, flexibility, and cost-effectiveness. These materials have transformed modern packaging through their lightweight offerings for food, ...  Read More

Composites and nanocomposites
Nanostructure Refining of Polypropylene/Nanoclay Composite via Optimization of Compatibilizer and Masterbatch Parameters

Negin Sadat Jalili; Bahereh T. Marouf; Ali Bakhshi-Zadeh; Reza Bagheri

Articles in Press, Accepted Manuscript, Available Online from 18 July 2025

https://doi.org/10.22063/poj.2025.35680.1355

Abstract
  The aim of the current study was to first make two compatibilizers, i.e., maleic anhydride grafted polypropylene (PP-g-MA), based on a homo-and a block copolymer. Then, these custom made compatibilizers were incorporated in PP/nanoclay composites made via direct and two-step masterbatch techniques. The ...  Read More