Accelerating effect of poly(methyl methacrylate) on rubber oxidation, Part 1: A chemiluminescence study

Broska, Rastislav; Billingham, Norman Ć.; Fearon, Peter K.

doi:10.1016/j.polymdegradstab.2008.03.012

Cited by 10 publications

(7 citation statements)

References 26 publications

(26 reference statements)

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“…Apart from those two pioneering works, little has been done on co-oxidation mechanisms either from the experimental [11] or from a modeling approach [12]. This is in spite of the fact that solving the complex differential systems derived from the co-oxidation scheme is nowadays relatively easy thanks to numerical solvers.…”

Section: Introductionmentioning

confidence: 99%

Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Richaud¹,

Fayolle²,

Verdú³

et al. 2013

Polymer Degradation and Stability

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tThe thermal oxidation of polyethylene (PE) impregnated by the methyl esters of unsaturated fatty acids (UFEs) was studied using chemiluminescence, and infra-red spectrophotometry. It was shown that the presence of UFEs accelerates the PE aging process. This can be interpreted as a co-oxidation phenomenon. In this study, the previously established models for PE and UFEs self-oxidation have been coupled in order to develop a co-oxidation model. Using the existing rate constants for the PE and UFEs selfoxidations, this model can simulate the complex shape of the kinetic curves of PE-UFE co-oxidation.

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Section: Introductionmentioning

confidence: 99%

Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Richaud¹,

Fayolle²,

Verdú³

et al. 2013

Polymer Degradation and Stability

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“…Thus, UV aging could enhance the flexural strength of the GEPDM-modified acrylic sheets to a higher level than that of thermal aging. Although it has previously been reported that acrylic sheets can be photodegraded due to the carbonyl chromophores [11], some previous reports have also revealed that the polymerization of MMA can be induced under UV irradiation [33,34]. Moreover, EPDM and GEPDM might Fig.…”

Section: Resultsmentioning

confidence: 93%

“…Although the diene-based rubbers, such as NBR, NR, polybutadiene and styrenebutadiene rubber, can be blended with the brittle plastics to enhance the impact resistance, the unsaturated C 0 C bonds in these rubbers can induce poor thermal and oxidation stability of the blends resulting in a limitation of their suitability for outdoor applications [11]. Thus, saturated elastomers are attractive materials to use for improving the mechanical properties, including the oxidative and thermal stability of the brittle materials.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and aging resistance performance of acrylic sheets containing EPDM-graft-poly(styrene-co-methyl methacrylate)

2012

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The addition of ethylene-propylene-diene rubber (EPDM) into acrylic sheets was expected to enhance their thermal and UV aging resistance for outdoor applications. According to the dissimilar polarity of EPDM and styrene (ST)/methyl methacrylate (MMA) monomer mixture (20/ 80% (w/w)) used for preparation of acrylic sheets, this research aimed to modify EPDM via graft copolymerization with ST and MMA to increase its compatibility. The graft copolymerization of ST and MMA at a ST/MMA ratio of 25/75% (w/w) onto EPDM was carried out in the solution polymerization initiated by benzoyl peroxide at 90°C for 16 h, resulting in 88.1% grafting efficiency. The addition of 1.0-3.0% (w/w) of graft EPDM (GEPDM) into the acrylic sheets increased their impact strength (~17-22%), but decreased their flexural strength (~12-36%). However, their mechanical properties were improved after thermal and UV aging. Scanning electron microscopy (SEM) based analysis of the modified acrylic sheets revealed that the fracture surface shifted from brittle to ductile failure characteristics after modification. The thermogravimetric analysis results also exhibited that the addition of GEPDM improved the thermal and UV resistance of the modified acrylic sheets by increasing their initial decomposition temperature and activation energy of thermal decomposition.

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“…Both types of samples with and without IPPD show a second important mass loss at temperatures about 460°C. According to the TG studies by Broska et al,28 this phenomenon is associated with the degradation of NBR. Referring the mass variation at this temperature to the final weight of the analyzed sample, the loss of NBR observed during the first 84 h of treatment is 8.2% in case of NBR and 2.1% for NBR IPPD .…”

Section: Resultsmentioning

confidence: 97%

Study of the influence of IPPD on thermo‐oxidation process of elastomeric hose

Colom¹,

Andreu‐Mateu²,

Cañavate³

et al. 2009

J of Applied Polymer Sci

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The aim of this study was to determine the influence of the N-isopropyl-N 0 -phenyl-p-phenylenediamine (IPPD) antioxidant agent on degradation of composites NBR/SiO 2 . The inhibition of the early stages of the degrading process has been particularly analyzed.Several NBR-SiO 2 matrix samples with and without IPPD have been exposed to an oxidizing atmosphere at 140 C for periods between 0 and 120 h. Besides, IPPD alone has been subject to the same aging thermo-oxidizing process. The degraded samples have been characterized by ATR-FTIR, TG, and SEM. Mechanical properties and degree of crosslinking have been determined. The results show that the IPPD improves the mechanical behavior of the composites submitted to thermo-oxidization, increasing the time in which composite retains rather good mechanical properties. IPPD decreases the ability of crosslinking of the rubber. ATR-FTIR spectroscopy study shows that the degradation process increases the volatility of the plasticizer and generates new unsaturation sites, which later will be the nuclei of crosslinking.

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Accelerating effect of poly(methyl methacrylate) on rubber oxidation, Part 1: A chemiluminescence study

Cited by 10 publications

References 26 publications

Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Mechanical and aging resistance performance of acrylic sheets containing EPDM-graft-poly(styrene-co-methyl methacrylate)

Study of the influence of IPPD on thermo‐oxidation process of elastomeric hose

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