Polyolefins synthesis

The Wharton-Grob fragmentation and the cationic cyclisation of polyolefins. Synthesis o/Cecropia juvenile hormone and d, -progesterone. 

The chemistry of organometallic group 4 metal compounds is well developed, thanks to their importance in polyolefin synthesis. Hence, their application in catalytic asymmetric hydroamination reactions is highly desirable. Group 4 metal complexes are commonly less sensitive and easier to prepare than rare earth metal complexes. Most important of all, many potential precatalysts or catalyst precursors are com mercially available. 

Figure 2. General symmetry classifications, based on ligand geometries, of catalysts and tbeir stereoselectivities for polyolefin synthesis.

Recent research in the field of polyolefins has focused on polyolefin synthesis. Polyolefins have been designed in different forms such as homopolymers, copolymers, and terpolymers. Careful control of the chain has resulted in a universal polymer. POCs, a subset of polymer composites, have evolved to meet... 

Polyolefins are a highly versatile polymer class used in a number of commercial applications. The discovery of more selective and efficient catalysts for polyolefin synthesis is a constant demand, and high-throughput experimentation has received considerable attention to meet this need. " Many of the techniques developed to identify these catalysts closely mirror the methods used in small-molecule dmg discovery and may not be generally applicable to the combinatorial polymer generation. 

Inspired by the widely used Ziegler-Natta (half-)titanocenes type catalysts in polyolefins synthesis with controlled stereochemistry, a series of commercially available and easily accessible Ti(iv) complexes 86, 87 were tested in the ROP of LAs (Scheme 6.8). Very recently, a major improvement has... 

A new development in polyolefin synthesis is the use of homogeneous single-site metallocene catalysts [11, 12], which unlike traditional Ziegler-Natta catalysts contain... 

Chapter 22 presents the different types of polymers produced from ethylene, propylene, and copolymers of these olefins with other monomers, along with some basic principles that apply to polyolefin synthesis and characterization. The basic features of the mechanism of the polymerization are presented first to provide a framework for the description of different catalysts and materials. After presenting different types of catalysts that have been used for the polymerization of these monomers, a more detailed description of several features of the mechanism is presented. Finally, an overview of ethylene oligomerization, as well as diene polymerization and oligomerization, is presented. The primary journal literature and patent literature on olefin polymerization is immense. Fortunately, many reviews of olefin polymerization have been published. The coverage of olefin polymerization and oligomerization in this chapter is selective, and the reader is directed to review articles for more comprehensive coverage of these topics. " ... 

Chung, T. C. Janvikul, W. Borane-containing polyolefins Synthesis and appheations. J. Oreanomet. Chem. 1999, 581, 176-187. 

Deanin R D and Chuang C H (1993) Polyolefin polyblends, in Handbook of Polyolefins Synthesis and Properties (Eds. Vasile C and Seymour R B) Marcel Dekker Inc, New York, NY, pp. 779-798. Fakirov S (2006) Modified Soxhlet apparatus for high-temperature extraction, J Appl Polym Sci 102 2013-2014. 

Functional Polyolefins Synthesis and Energy Storage Applications... 

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