Melt free-radical grafting of hindered phenol antioxidant onto polyethylene

Kim, Taek Hyeon; Kim, Hyunkyu; Oh, Dong Ryun; Chae, Kyu Ho; Kaang, Shinyoung

doi:10.1002/1097-4628(20000923)77:13<2968::aid-app21>3.0.co;2-t

Cited by 21 publications

(8 citation statements)

References 10 publications

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“…Gel fraction was measured gravimetrically by immersing the samples in xylene at 140 °C for 12 h. The residue was dried to constant weight for 24 h at 60 °C in a vacuum oven [18]. Three species were used to determine the average value for each sample (ASTM D 2765).…”

Section: Gel Content Of Samplesmentioning

confidence: 99%

Reactive melt modification of polyethylene by ethyl acrylate/acrylic acid copolymers: rheology, morphology and thermal behavior

2015

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Section: Gel Content Of Samplesmentioning

confidence: 99%

Reactive melt modification of polyethylene by ethyl acrylate/acrylic acid copolymers: rheology, morphology and thermal behavior

2015

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“…Maleated polyethylene (MAPE) was used as a coupling agent in the hybride composite [3][4][5] while dicumyl peroxide (DCP) used as a nucleating agent [6][7][8][9] being most utilized for chemical bonding to both the wood fiber and the polymer matrix [10]. Moreover, natural fibers are rich in lignin with abundant hydroxide group to react with maleic anhydride group to form branched structures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Variables on the Mechanical Properties and Maximization of Polyethylene—Aspen Composites by Statistical Experimental Design

Kokta

Chalupova

2009

Journal of Thermoplastic Composite Materials

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Systemic studies of the effects of the concentrations of maleated polyethylene (MAPE) loading, the content and addition sequence of dicumyl peroxide, the content and type of nanoclay (NC), and aspen fiber loading on the mechanical properties of PE-aspen composites were undertaken with the objective to increase the impact strength as well as the tensile properties. In this article, the formation of an optimal compatibilizing system for the hybrid composite PE-aspen-NC by combining basic principles for compatibilization was investigated. Statistical approach experimentation using Statgraphics Centurion Õ with the objective to maximize both the tensile strength as well as the impact properties of natural fiber and nanoclay filled PE was applied to reach values well above that of virgin PE.

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“…Polyolefins are very sensitive to these kinds of reactions, collectively identified as degradation 9–11. The addition of stabilizers before processing is the most effective way to protect against polymer degradation 12…”

Section: Introductionmentioning

confidence: 99%

Effects of a mixture of stabilizers on the structure and mechanical properties of polyethylene during reprocessing

Abad

Ares

Barral

et al. 2004

J of Applied Polymer Sci

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ABSTRACT:The properties of two polyethylenes [a highdensity polyethylene (HDPE) and a low-density polyethylene (LDPE)] were studied after several extrusion cycles. To reduce the degradation effects during the reprocessing, a mixture of two stabilizers was added to the formulations. The predominant degradation mechanism was chain scission for the HDPE and chain branching and crosslinking for the LDPE. For both polyethylenes the FTIR spectra exhibited a growth in the number of carbonyl groups as a function of the number of extrusion cycles. Their tensile properties were degraded with the reprocessing but both polyethylenes maintained their nearly constant thermal behavior and crystallinity. The addition of a primary phenolic antioxidant and a secondary phosphite antioxidant preserved the melt behavior of virgin materials after the reprocessing and reduced the degradation effects. From the tensile tests, the efficiency of the antioxidants in the LDPE was very high and, after the reprocessing, the material retained the mechanical properties of virgin LDPE. The efficiency of the antioxidants for the HDPE was not significant.

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Melt free-radical grafting of hindered phenol antioxidant onto polyethylene

Cited by 21 publications

References 10 publications

Reactive melt modification of polyethylene by ethyl acrylate/acrylic acid copolymers: rheology, morphology and thermal behavior

Reactive melt modification of polyethylene by ethyl acrylate/acrylic acid copolymers: rheology, morphology and thermal behavior

Effect of Variables on the Mechanical Properties and Maximization of Polyethylene—Aspen Composites by Statistical Experimental Design

Effects of a mixture of stabilizers on the structure and mechanical properties of polyethylene during reprocessing

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