Results 61 to 70 of about 94,776 (218)

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

Spectroscopic Signature and Structure of Active Sites in Ziegler-Natta Polymerization Catalysts revealed by Electron Paramagnetic Resonance

, 2021
Despite decades of extensive studies, the atomic-scale structure of the active sites in heterogeneous Ziegler-Natta (ZN) catalysts, one of the most important processes of the chemical industry, remains elusive and a matter of debate. In the present work,
Anne, Lesage, Gunnar, Jeschke, Matthieu, Humbert, Jean, Raynaud, Sebastien, Norsic, David, Gajan, Jan, Blahut, Daniel, Klose, Keith, Searles, Christophe, Copéret, Vincent, Monteil, Anton, Ashuiev, Guido, Pintacuda   +12 more
core   +1 more source

Ethylene Homopolymerization by Ziegler-Natta (TiCl4/MgCl2) Catalyst through Full Factorial Experimental Design [PDF]

علوم و تکنولوژی پلیمر, 2009
Full factorial experimental design (23) for the evaluation of slurry ethylene polymerization in the presence of an industrial TiCl4/MgCl2 Ziegler-Natta catalyst was employed.
S. Hakim, M.M. Mortazavi, L. Moballegh, M. Nekoomanesh Haghighi   +3 more
doaj   +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

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

Study of Ziegler-Natta /Metallocene Hybrid Catalyst on Pilot Device

, 2011
In this work, Ziegler-Natta/Metallocene hybrid catalyst (Z-M) was prepared magnifying. The activity and copolymerization behavior of the catalyst were evaluated through 10L model device.
Jun Ji Jia, Bo Chao Zhu, Jing Wang, Xiao Yan Liu, Xu Chen   +4 more
core   +1 more source

اثر اصلاح کنند ه ها روی فعالیت کاتالیزورهای زیگلر-ناتا و خواص نهایی پلیمر در پلیمرشدن اولفین ها [PDF]

Baspārish, 2015
فعالیت کاتالیزور از مهم ترین پارامترها در فرایندهای پلیمرشدن است. برای یک سامانه کاتالیزوریفعالیت ممکن است به شرایط پلیمرشدن از قبیل دما و فشار وابسته باشد.
رضا بازوند, نعیمه بحری, مهدی نکومنش, حسین عابدینی   +3 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

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

Long‐Term Thermal Stability of Electron‐Beam‐Irradiation‐Crosslinked Polypropylene Films for Power Capacitors

Electrical Materials and Applications, Volume 3, Issue 1, January/December 2026.
The polypropylene (PP) dielectric film undergoes severe degradation at high temperature. Electron‐beam irradiation crosslinking induces the formation of a compact spherulitic morphology in PP, which effectively restricts molecular‐chain mobility and hinders oxygen diffusion, thereby enhancing its long‐term thermal stability.
Liangtian Zhang, Yuyan Chen, Zhaochen Wang, Zening Lu, Zhaoliang Xing, Shaowei Guo, Haosen Du, B. X. Du, Meng Xiao   +8 more
wiley   +1 more source