@inbook {45809,
	title = {Insertion or ziegler-natta polymerization of olefins: science and technology},
	booktitle = {Metal-catalyzed polymerization: fundamentals to applications},
	year = {2017},
	pages = {31-116},
	publisher = {CRC Press},
	organization = {CRC Press},
	abstract = {<p>One of the most disruptive discoveries of twentieth century has been metal-catalyzed polymerization of ethylene to polyethylene by Prof. Karl Ziegler from the Max Plank Institut Fuer Kohlenforschung, Mulheim, Germany. This discovery marked the beginning of an era, which revolutionized the field of chemistry, in particular, the field of polymer chemistry in many aspects and saw an avalanche of patents and publications. Unlike typical academic discoveries, this invention did not stop at the academic labs, but led to the development of a large-scale process that produces about 180 million tons of polyolefins (annually) today. 1 But the very obvious question that comes to our mind is what prompted Prof. Ziegler to react ethylene with the two components (that we will discuss later in this chapter)? It was not an overnight realization, but instead, it was rational analysis of a serendipitous observation and systematic experimentation by Prof. Ziegler.</p>},
	isbn = {978-149876758-3},
	issn = {978-149876757-6},
	doi = {10.1201/b19905},
	author = {Chikkali, S. H. and Patel, K., and Netalkar, S.}
}
@article {49825,
	title = {Waste polyethylene to long-chain unsaturated esters and alcohols via alkene cross-metathesis},
	journal = {Journal of Macromolecular Science Part A-Pure and Applied Chemistry},
	volume = {62},
	year = {2025},
	month = {AUG },
	pages = {660-668},
	type = {Article},
	abstract = {<p>
	The conversion of waste polyethylene into valuable long-chain functional molecules offers a contemporary solution to the global plastic waste challenge. This study presents a two-step catalytic approach, comprising of polyethylene (PE) dehydrogenation followed by cross-metathesis with renewable resource-derived functional olefins, catalyzed by the Grubbs-II catalyst (G-II). A dehydrogenated polyethylene (DHP) was subjected to a tandem catalytic cross-alkene metathesis with functional olefins under mild conditions to achieve approximately 36\% conversion of DHP into valuable long-chain building blocks with controlled product distribution. Comprehensive characterization of intermediates and products was performed using NMR, GC, GC-MS, GPC, and DSC. In the alkene cross-metathesis with methyl-10-undecenoate, the product distribution consisted of 23\% lower alkenes (C8-C14), 40\% unsaturated long-chain mono-esters (C12-C18), and 37\% unsaturated di-esters. In the case of 10-undecen-1-ol, the distribution included 20\% lower alkenes (C8-C11), 32\% unsaturated long-chain (C12-C18) mono-alcohols, and 48\% unsaturated di-alcohols. This strategy opens up new opportunities for converting waste polyethylene into high-value chemical intermediates, enabling resource recovery and delivering environmental benefits.</p>
},
	keywords = {depolymerization, functional olefins, Metathesis, Recycling, Value-added products},
	issn = {1060-1325},
	doi = {10.1080/10601325.2025.2533794},
	author = {Khopade, K. V. and Bodkhe, D. V. and Chikkali, S. H.}
}
