Metal oxide as a template in the preparation of porous poly(2-hydroxyethylmethylacrylate-co-divinylbenzene) particles as a metallocene catalyst support

Abstract

Porous functional P(HEMA-co-DVB) particles with controllable pore structure and morphology were prepared using metal oxide as particle-forming template.

Porous Organic Polymers-Supported Metallocene Catalysts for Ethylene/1-Hexene Copolymerization

“…However, despite the different pore size distribution, a similarity exists in the pore structure of the three POP supports, such that high abundance in the pore size of 1-4 nm scale can be observed in their NLDFT curves. Furthermore, the pore size distribution of the HEMA-functionalized POPs could be easily controlled by the selection of different HEMA/divinylbenzene (DVB) molar ratio or different solvent [29,30]. In contrast, the pore sizes of silica 2408 mainly focused in the meso-pore range (roughly 6-30 nm).…”

“…HEMA-functionalized porous organic polymers particles were synthesized according to a dispersion polymerization method reported by our group [29,30]. Briefly, 140 mL solvent was charged into a multi-necked glass reactor, then 0.0369 mol of DVB (80%), 0.0246 mol of HEMA, and 2 wt % of PVA were added into the reactor when stirring.…”

“…The (n-BuCp) 2 ZrCl 2 /MAO metallocene system was immobilized on the prepared POPs after they were vacuum-dried at 120 • C for 8 h. Sylopol 2408 silica support was activated at 600 • C for 10 h at nitrogen atmosphere and used as control sample. The supporting procedure was with Schlenk and glove-box techniques under high-purity nitrogen according to previous work [29]. The supporting procedure is summarized as follows.…”

“…In contrast, porous organic polymer (POP) supports offer significant advantages over their inorganic equivalents: they provide a much closer analogue to the environment prevailing in homogeneous polymerization, do not require fastidious pre-treatment, and should not significantly affect the final polyolefin properties [9,[20][21][22]. Furthermore, porous organic polymers can be properly designed and synthesized with tunable pore size distribution, flexible synthetic strategy, and readily modifiable functionality [23][24][25][26][27][28][29][30][31].…”

Feasibility Study on the Design and Synthesis of Functional Porous Organic Polymers with Tunable Pore Structure as Metallocene Catalyst Supports

“…Porous organic polymers (POPs) have received a staggering degree of attention in various research areas, including adsorption, separation, and heterogeneous catalysis, owing to their huge surface area, tunable pore size, flexible synthetic strategy, and readily modifiable functionality [1,2,3,4,5,6,7,8,9]. Numerous studies on these porous organic materials, including covalent organic frameworks (COFs) and porous coordination polymers (PCPs) or metal-organic frameworks (MOFs), as olefin polymerization-catalyst supports and mobilization procedures have been investigated [10,11,12]. Unlike inorganic supports, such as silica gel, zeolites, molecular sieves, which need complex chemical treatments to get rid of acidic groups on their surfaces and present residual inorganic fragments within the produced polyolefins that may affect their mechanical and optical properties [13,14,15,16], POPs offer significant advantages over their inorganic equivalents: they provide a much closer analogue to the environment prevailing in the homogeneous polymerization, do not require a fastidious immobilization procedure, and should not significantly affect the final polyolefin properties [17,18,19,20].…”