Synthesis of 1‐hexene/1,7‐octadiene copolymers using coordination polymerization and postfunctionalization with triethoxysilane

Abstract

Homo‐ and copolymerization of 1‐hexene (H) and 1,7‐octadiene (O) were done using two different catalysts 1,4‐bis(2,6‐diisopropylphenyl)acenaphthenediiminedibromo nickel (II) and rac‐ethylenebis(indenyl)zirconium dichloride [rac‐Et(Ind)2ZrCl2]. The metallocene catalyst showed higher activity than the nickel α‐diimine catalyst in homo‐ and copolymerization. The 1H NMR studies confirmed the formation of copolymers containing 8–47% of 1,7‐octadiene. In the copolymerization of hexene and diene, as the amount of incorporated diene in the copolymers increased, their T g increased. TGA results showed that thermal stability of the polymer increases with the increase of 1‐hexene incorporation in the polymer chain. Finally 1‐hexene/1,7‐octadiene copolymers were functionalized by triethoxysilane in the presence of hexachloroplatinic acid. The 1H NMR spectrum of the functionalized samples showed that the double bonds in the copolymer structure were completely eliminated. The DSC analysis showed higher T gs for the functionalized copolymer. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48934.

5‐Ethylidene‐2‐norbornene Polymerization by α‐Diimine Nickel Catalyst: A Revealing Insight into the Pivotal Function of Binuclear and Mononuclear Catalyst Structure in Tailoring Polymer Architecture

“…After the desired time, the reaction was terminated by the addition of 500 mL acidified ethanol to the reaction flask. The precipitated polymer was then filtered and washed by a large volume of ethanol and subsequently dried at 60 °C for 4 h. [ 24 ]…”

“…The nickel 𝛼-diimine catalysts were synthesized according to the previous publication, and their structures are shown in Schemes 1. [22,24]…”

Functionalization of Poly (1‐hexene) with Maleic Anhydride: The Effect of Reaction Parameters

“…Functionalized poly(α-olefins) can be used as surface modifiers to improve adhesion, compatibility with other polar polymers, or to modify the physical and chemical properties of the final product. [11][12][13][14] After discovery of common polyolefins such as HDPE and PP in the mid-1950, vast efforts were begun to functionalize polyolefins. [15] There are several methods for functionalization of nonpolar polyolefin chains, which three methods are more common; direct copolymerization with functionalized monomers, indirect copolymerization with functionalized monomers, and finally post-polymerization modification process of polyolefin.…”

“…In the recent years, considerableextent of attention has been paid to polyolefins with a functional group. Functionalized poly(α‐olefins) can be used as surface modifiers to improve adhesion, compatibility with other polar polymers, or to modify the physical and chemical properties of the final product [11–14] . After discovery of common polyolefins such as HDPE and PP in the mid‐1950, vast efforts were begun to functionalize polyolefins [15]…”

Comonomer-controlled synthesis of long-chain branched (LCB)-polyethylene

“…During the last three decades, metallocene-catalyzed ethylene/diene copolymerization has emerged as an efficient method towards post-functionalized- [1,2,3,4,5,6] and long-chain branched (LCB) polyethylene (PE) [7,8,9,10,11,12,13,14,15,16,17]. The latter aspect proved particularly interesting, since LCB-PEs most often exhibit significantly better processability than their linear counterparts, albeit retaining the excellent mechanical properties (i.e.…”