Assessment of hindered phenol antioxidants on processing stability of peroxide‐cure LDPE by rheology and DSC analysis

Abstract

Influence of commercial phenol antioxidants Irganox 300, 1010, 1035, and 1076 on peroxide-cure reaction of low-density polyethylene (LDPE) was evaluated through isothermal dynamic rheological and nonisothermal differential scanning calorimetry (DSC) testing. The results indicated that phenol antioxidants could reduce storage modulus of LDPE completely crosslinked at 175 C while they have a neglectable effect on gel fracture and activity energy of crosslinking reaction. On the other hand, time sweep dynamic rheological test revealed the antioxidants 1035 and 1076 with low molecular weight and low melting point could significantly depress scorch of crosslinkable LDPE at 135 C. The isothermal time sweep dynamic rheology test method was more sensitive than nonisothermal DSC test for characterizing the influence of phenol antioxidants on crosslinking kinetics of peroxide-cure reaction of LDPE. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: 939-946, 2012

Influence of crosslinking on crystallization, rheological, and mechanical behaviors of high density polyethylene/ethylene‐vinyl acetate copolymer blends

“…The blend with weight content of EVA ( w EVA ) of 30 wt% was denoted as EVA30, and so on. According to the decomposition kinetics , DCP decomposed during mixing was <5 wt%.…”

Crosslinking of low density polyethylene with octavinyl polyhedral oligomeric silsesquioxane as the crosslinker

“…However, using DCP to crosslink polyolen is always accompanied with side reactions such as chain scission and scorch at high temperature and production of small pores. 42,43 These issues can be properly addressed by using OVPOSS as the crosslinker, in which only a small amount of DCP is needed as the initiator.…”

Thermal and mechanical properties of LDPE by the effects of organic peroxides

“…Polyethylene is widely used for manufacturing various containers, dispensing bottles, wash bottles, tubing, plastic bags for computer components, and various molded laboratory equipment . Cross‐linking is the desired process in order to accomplish these qualities, and this can be achieved by organic peroxides …”

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