Results 81 to 90 of about 1,886 (220)

Overcoming Challenges in 3D Printing of Polyolefins and Their Composites: A Review on Strategies for Improved Printability and Performance

Polymer Engineering &Science, Volume 66, Issue 5, Page 3100-3141, May 2026.
This review integrates the molecular fundamentals, key challenges, and mitigation strategies in polyolefin 3D printing, focusing on shrinkage, warpage, and adhesion control. It highlights material design approaches using recycled polyolefins and functional fillers to improve printability, mechanical properties, and sustainability in additive ...
Malik Hassan, Philip McMorran, Marwan Eid, Julia Blair, Amar K. Mohanty, Manjusri Misra   +5 more
wiley   +1 more source

Copolymerization of ethylene with 2,5-norbornadiene using a homogeneous metallocene/MAO catalyst system

, 1999
Copolymerization of ethylene with a symmetrical diene, namely, 2,5-norbornadiene was studied using a homogeneous metallocene/MAO catalyst system. Copolymerizations were found to occur exclusively through one of the two equally reactive endocyclic double ...
Radhakrishnan, K., Sivaram, S.
core   +1 more source

Space Charge in Low Density Polyethylene Prepared by Metallocene Catalyst [PDF]

, 2001
We investigated the space charge behavior in low-density polyethylene polymerized by using metallocene catalyst (m-LDPE). The space charge distributions were measured by pulsed Electro-Acoustic (PEA) method. We used the Al/semiconductive electrode system.
Taniguchi, Yoshihide, Mizutani, Teruyoshi, Ishioka, Mitsugu, Kaneko, Kazue   +3 more
core   +1 more source

Electroenzymatic Cascades for Nitrogen Upgrading: Beyond Ammonia Towards Value‐Added Nitrogen Chemicals

ChemCatChem, Volume 18, Issue 7, 14 April 2026.
This review maps how electroenzymatic cascades that couple nitrogen‐cycle enzymes with C─N bond forming auxilary enzymes, powered by direct electron transfer (DET) or mediated electron transfer (MET), can upgrade N2 and waste nitrogen streams into value‐added amines, amides, amino acids, and other nitrogen‐based chemicals.
Rohit G. Jadhav, Vamshi Krishna Kamaja, Wassim El Housseini, Monica Brachi, Shelley D. Minteer   +4 more
wiley   +1 more source

Towards designer polyolefins: highly tuneable olefin copolymerisation using a single permethylindenyl post-metallocene catalyst. [PDF]

Chem Sci, 2023
Collins Rice CG, Morris LJ, Buffet JC, Turner ZR, O'Hare D.   +4 more
europepmc   +1 more source

Homogeneous Tandem Catalysis of Bis(2-decylthioethyl)amine−Chromium Trimerization Catalyst in Combination with Metallocene Catalysts

, 2016
Homogeneous tandem catalysis involving a highly selective, aluminoxane-activated bis(2-decylthioethyl)amine·CrCl3 complex for the synthesis of 1-hexene in tandem with a number of metallocene catalysts is discussed.
Deon de Wet-Roos (2700082), John Thomas Dixon (2700079)   +1 more
core   +2 more sources

Preparation of “Constrained Geometry” Titanium Complexes of [1,2]Azasilinane Framework for Ethylene/1-Octene Copolymerization

Molecules, 2017
The Me2Si-bridged ansa-Cp/amido half-metallocene, [Me2Si(η5-Me4C5)(NtBu)]TiCl2, termed a “constrained-geometry catalyst (CGC)”, is a representative homogeneous Ziegler catalyst.
Seul Lee, Seung Soo Park, Jin Gu Kim, Chung Sol Kim, Bun Yeoul Lee   +4 more
doaj   +1 more source

Synthesis of Elastomers by Metallocene Catalysts.

Kobunshi, 1997
メタロセン触媒技術を用いたポリオレフィンの企業化が行われている.エラストマー領域においてもExxon,Dow,三井石化を中心に企業化が進行しつつある.ここでは,メタロセン触媒のエラストマー合成上の特徴である(1)ポリマー品質の優位性,(2)高共重合性,(3)高温高重合性,(4)新規ポリマー合成などに焦点を合わせて,最近の触媒研究の動向,各社の現状を報告する.
openaire   +2 more sources

Structure-property relations of heterophasic ethylene-propylene copolymers based on a single-site catalyst

eXPRESS Polymer Letters, 2017
The target of the present study was to investigate the structure-property relationships of heterophasic ethylenepropylene (EP) copolymers based on a single-site (metallocene) catalyst (SSC) supported with an emulsion technology developed by Borealis. The
M. Aarnio-Winterhof, P. Doshev, J. Seppala, M. Gahleitner   +3 more
doaj   +1 more source

Comparison of gas- and liquid-phase polymerization of propylene with heterogeneous metallocene catalyst [PDF]

, 2001
Sorption measurements are executed to study the sorption behavior of propylene in a semicrystalline polymer. Decreasing values for the Flory-Huggins interaction parameter with increasing temperature are obtained. Large deviations are found, especially at
G. B. Meier, W. P. M. van Swaaij, G. Weickert, van Swaaij, Willibrordus Petrus Maria, Weickert, G., Meier, G.B.   +5 more
core   +1 more source