Effect of electron beam irradiation on the properties of EVA/EPDM blends

Abstract

Effect of electron beam (EB) irradiation on the properties of ethylene vinyl acetate (EVA)/ethylene–propylene–diene monomer (EPDM) (50/50) blends was studied. The blends were firstly melt-compounded at 130°C followed with being irradiated using 4.0 MeV EB energy at doses ranging from 0 kGy to 200 kGy. It is found that the dosage of irradiation plays a key role in the properties of the blends. With the increasing dosage of irradiation, tensile strength and thermal stability were enhanced. The irradiation exerts a cross-linking effect on the blends, and the increase in density is responsible for the enhanced properties. Dynamic mechanical and thermal analyses and morphology indicate that irradiation does not play any negative role in the compatibility between EVA and EPDM. Hot set test reveals that irradiation could improve the heat deformation property of blends. Thus, it is reasonable and interesting to modify EVA/EPDM blends using EB irradiation to further increase its properties.

Polymeric compounds based on thermoplastic elastomer styrene-butadiene-styrene block copolymers and siliconic rubber powder

“…For this, as Table 1 shows, the PT/N20 and PT/N20+5P blends contain an agent for initiating grafting and crosslinking reactions (di-2-tert-butylisopropyl benzene) and a polyfunctional monomer (trimethylolpropane trimethacrylate) which possessed high reactivity; this can undergo free radical grafting reaction on the polymer chain producing a network structure. 19,20…”

“…For this, as Table 1 shows, the PT/N20 and PT/N20+5P blends contain an agent for initiating grafting and crosslinking reactions (di-2-tert-butylisopropyl benzene) and a polyfunctional monomer (trimethylolpropane trimethacrylate) which possessed high reactivity; this can undergo free radical grafting reaction on the polymer chain producing a network structure. 19,20 The compounds were obtained by mixing technique, on Brabender Plasti-Corder internal mixer type, at 150°C for 7 min. The rotor speed was 30 r/min in the first 2 min and increased to 80 r/min for the next 5 min.…”

Influence of E‐beam irradiation on compounds from linear low density polyethylene and thermoplastic vulcanized rubber consisting of a polypropylene and ethylene propylene diene monomer rubber phase

“…By adding EVA to the compounds, an evaluation whether a crosslink enhancer leads to higher gel content is possible. The enhancement of the corsslinking is also reported to improve tensile strength and thermal stability of compounds from EVA and EPDM 33 …”

Electron beam irradiation treatment of textiles materials: a review

“…EB-irradiation (EBI) is a dry, pollution-free, and cool technology that eliminates the need for solvents and reagents used in wet chemical procedures. It provides advantages such as speedy processing, high flow rate, consistency, and environmental and labor protection while manufacturing [16][17][18][19][20][21][22]. EBI is widely used in several applications, inclusive of polymer and composite curing, polymer modification [23,24] fiber surface modification [25], water purification [26], property improvement [21], and sterilization of medical tools and food science [27][28][29].…”

“…It provides advantages such as speedy processing, high flow rate, consistency, and environmental and labor protection while manufacturing [16][17][18][19][20][21][22]. EBI is widely used in several applications, inclusive of polymer and composite curing, polymer modification [23,24] fiber surface modification [25], water purification [26], property improvement [21], and sterilization of medical tools and food science [27][28][29]. EBI units have provided the estimated US $85 billion value provided unique highquality products for mankind in an environmentally friendly way.…”