Synthesis and properties of high oil‐absorbent 4‐tert‐butylstyrene‐EPDM‐divinylbenzene graft terpolymer

Abstract

ABSTRACT:The graft crosslinking polymerization of 4-tert-butylstyrene (tBS) and divinylbenzene (DVB) onto ethylene-propylene-diene (EPDM) was carried out in toluene by using benzoyl peroxide (BPO) as an initiator. The synthesized graft terpolymer, tBS-EPDM-DVB (PBED), was extracted with tetrahydrofuran (THF) into gel (called as PBED I) and sol, and then they were identified by infrared (IR) spectroscopy. The effects of solvent amount, molar ratio of DVB to tBS, EPDM content, initiator concentration, reaction temperature, and reaction time on the graft crosslinking polymerization were examined. Among them, solvent amount and molar ratio of DVB to tBS were the important factors for this reaction system. Maximum oil absorbency of PBED I was 84.0 g/g but its oil-absorption kinetic rate was very low. Sol PBED can be reused as oil absorbent (named as PBED II) through photocrosslinking by ultraviolet light irradiation. Although the oil absorbencies of PBED II were lower than those of PBED I in most cases, their oil absorption kinetic rates were higher than oil absorbencies of PBED I. The highest value of oil absorbency of PBED II was 56.0 g/g. The thermal stability of PBED I was studied by TGA.

Optimization Synthesis Conditions and Characterization of Oil Biosorbent: Sugarcane Bagasse Cellulose-Graft-Polystearylmethacrylate Copolymer

“…Furthermore, the decomposition rate of the initiator also increases and eventually descended the trigger efficiency after excessive amounts of initiator. A similar observation was made in the work of (Zhou et al 2002). As a result, the sorption capacity increases initially, but after further increasing the initiator amount, the sorption capacity decreases.…”

“…As the reaction time increased, the sorption capacity also increased, until a maximum was reached at 2 h, after which the capacity leveled off and slightly decreased. The explanation for the decrease in sorption capacity lies in the formation of homopolymers or copolymers, as well as the increase in viscosity of the reaction mass along the reaction path (Zhou et al 2002). …”

β-Cyclodextrin-based oil-absorbents: Preparation, high oil absorbency and reusability

“…For some oil-absorbents in literature, soluble fraction (SF) (Atta et al, , 2006(Atta et al, , 2007a(Atta et al, , 2007b or gel fraction (GF) (Zhou & Cho, 2002) was measured to investigate the cross-linking of the absorbent networks. In the present study, cross-link degree (D) of the oil-absorbents was determined in a similar way to characterize the oil-absorbents.…”

Synthesis and characterization of a novel high‐oil‐absorbing resin

“…The oil-absorbing resin crosslinking density was determined by ASTM F726-81; 0.1 g of sample was put in stainless steel mesh (4 Â 4 Â 2 cm 3 ) that had been immersed in diesel and weighed beforehand. The sample and the mesh were together picked up from oil, drained for 20 s, tapped with filter paper to remove excess oil from the bottom of the mesh, and then weighed on a balance.…”

“…Among them, the capability of oil-absorbing resin is seen to be superior to other ordinary materials. [1][2][3][4] This resin can be made granular, sheeted, or as an emulsion and can be applied not only in environmental protection but also in agriculture, medicine, and industry. It is this broad range of possible applications that has led to recent interest in this system.…”