Results 71 to 80 of about 2,167 (208)

Understanding the activity and stability of Lewis acid-modified Ziegler–Natta catalysts for the sustainable production of polypropylene

Journal of Taibah University for Science
Cleaner polymer production involves minimizing environmental impact by using efficient catalysts and eco-friendly synthesis methods. Identifying active and stable catalysts is essential.
Rafik Rajjak Shaikh, Yodsamol Sainu, Supareak Praserthdam, Piyasan Praserthdam   +3 more
doaj   +1 more source

Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization [PDF]

Polyolefins Journal, 2017
The aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization.
Farshid Nouri-Ahangarani, Mehdi Nekoomanesh, Seyed Amin Mirmohammadi, Naeimeh Bahri-Laleh   +3 more
doaj   +1 more source

PEDOT:PSS—A Key Material for Bioelectronics

Advanced Science, Volume 13, Issue 11, 23 February 2026.
PEDOT:PSS ‐ Poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate ‐ is typically processed from water dispersions to form multifunctional and multidimensional constructs with tunable electronic and ionic conductivity. Throught processing engineering, PEDOT:PSS is intergrated in bioelectronic devices that operate efficiently in physiological conditions
Alan Eduardo Ávila Ramírez, David Pieter van der Laan, Mustafeez Bashir Shah, Liwen Wang, Erica Zeglio, Achilleas Savva   +5 more
wiley   +1 more source

Functionalized Polyolefin With Photoresponsive Surface

ChemistryEurope, Volume 4, Issue 2, February 2026.
The introduction of stimulus‐responsive groups can give polymers some material properties that cannot be realized simply by design and synthesis. Polyolefins, due to their nonpolar nature, suffer from poor compatibility with polar materials; however, directly grafting polar groups like hydroxyls onto their surface via traditional synthesis risks ...
Qiuhui Tian, Zhiwei Xia, Yanyan Wang, Zhiyi Liu, Qiuping Chen, Yu Wang, Fuzhou Wang, Chen Tan   +7 more
wiley   +1 more source

Developing Calibration Reference Materials and Standardized Protocols for Reliable DSC of Polyolefins

Journal of Applied Polymer Science, Volume 143, Issue 3, January 15, 2026.
Standardized protocol for reducing T m standard deviation. ABSTRACT Differential scanning calorimetry (DSC) serves as a critical analytical tool in the polyolefin industry for quality control and product differentiation. Between 2000 and 2025, 7574 global patent applications referenced DSC data, highlighting its ubiquitous role in the industry.
Xingxing Zhang, Lin Liu, Xuelei Duan, Zhe Zhou, Peiqian Yu, Yue Yu, Linfeng Chen, Rongjuan Cong   +7 more
wiley   +1 more source

Natural and synthetic isoprene rubbers obtained using Ziegler–Natta catalysts

Тонкие химические технологии
Objectives. To compare the properties of rubber compounds and rubbers based on natural rubber RSS1 and synthetic isoprene rubbers obtained using Ti, Nd, Gd catalysts, both when used individually in the formulation of rubber compounds and when synthetic ...
A. A. Zuev, V. L. Zolotarev, I. P. Levenberg, L. A. Kovaleva, I. Sh. Nasyrov   +4 more
doaj   +1 more source

Styrene Polymerization with Group III Metallocenes: A Generative and Interpretable Catalyst Design Strategy Combining Density Functional Theory and Machine Learning

ChemistryEurope, Volume 4, Issue 1, January 2026.
Machine‐learning methods are used to predict styrene binding energies and insertion barriers in a series of group III cationic catalysts. A generative algorithm based on these predicted data is provided to propose new catalysts. The rational design of group III metallocene catalysts for styrene polymerization remains a complex challenge due to ...
Stella Christodoulou, Etienne Dos Santos, Romuald Poteau, Laurent Maron   +3 more
wiley   +1 more source

End-to-End High-Throughput Approach for Data-Driven Internal Donor Development in Heterogeneous Ziegler-Natta Propylene Polymerization

Internal donors (IDs) play a decisive role in shaping the structure and performance of Ziegler-Natta catalyst formulations for the isotactic polypropylene production.
Patchanee, Chammingkwan, Vincenzo, Busico, Toshiaki, Taniike, Felicia Daniela, Cannavacciuolo, Mostafa, Khoshsefat, Diego , De Canditiis, Giuseppe, Antinucci, Roberta, Cipullo   +7 more
core   +1 more source

Selective Semi‐Hydrogenation of Acetylene using a Single‐Atom Cobalt on Carbon Nitride Photocatalyst with Water as a Proton Source

Small Methods, Volume 10, Issue 2, 22 January 2026.
A sustainable alternative to the energy‐intensive traditional thermocatalytic hydrogenation of acetylene to ethylene is reported. The catalyst is a cobalt single‐atom catalyst supported on carbon nitride that is powered by visible light, uses water as a proton source and demonstrates high selectivity, stability, and recyclability.
Anna Fortunato, Daniele Perilli, Alexandru Dron, Verónica Celorrio, Goran Dražić, Luka Ðorđević, Laura Calvillo, Cristiana Di Valentin, Francesca Arcudi   +8 more
wiley   +1 more source

Correlation Between Vinyl Content of Recycled HDPE and Polymer Degradation: An NMR Approach

Journal of Applied Polymer Science, Volume 142, Issue 47, December 15, 2025.
The degradation behavior of high‐density polyethylene (HDPE) during recycling depends on its vinyl group content. This study shows that 1H NMR spectroscopy enables accurate assessment of vinyl groups unlike FTIR. Changes in melt flow and molecular weight with multiple processing are linked to vinyl content which could enable tailor‐made re‐additivation
Kim Hao Ng, Frank Malz, Elke Metzsch‐Zilligen, Rudolf Pfaendner   +3 more
wiley   +1 more source