Synthesis of maleic anhydride grafted polyethylene and polypropylene, with controlled molecular structures

Lü, Bing; Chung, Tze-chiang

doi:10.1002/(sici)1099-0518(20000415)38:8<1337::aid-pola18>3.0.co;2-8

Cited by 80 publications

(68 citation statements)

References 32 publications

(17 reference statements)

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“…The grafting of maleic anhydride (MA) to the polyolefin backbone [1][2][3] opened the way to modified polyolefins acting as an efficient compatibilizer for a large number of blends [4][5][6]. Maleation of polyethylene (PE), as a polymer exhibiting a higher grafting efficiency towards reaction with MA comparing to the other polyolefins [7,8] can be conducted by many methods, including grafting with the aids of free-radical initiator in solution [9][10][11] or in the melt [12][13][14][15] and radiation grafting [16][17][18]. Maleic anhydride (MA), because of its poor homopolymerization characteristics toward free radicals, is a suitable grafting agent for the modification of PE substrates [19].…”

Section: Introductionmentioning

confidence: 99%

Effect of nitroxyl-based radicals on the melt radical grafting of maleic anhydride onto polyethylene in presence of a peroxide

Belekian

Beyou

Chaumont

et al. 2015

European Polymer Journal

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Section: Introductionmentioning

confidence: 99%

Effect of nitroxyl-based radicals on the melt radical grafting of maleic anhydride onto polyethylene in presence of a peroxide

Belekian

Beyou

Chaumont

et al. 2015

European Polymer Journal

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“…This result shows that the AM1 agent (maleic anhydride) acts as a good coupling agent, increasing the polarity of the PP-PE matrix and improving the reinforcement/matrix interaction. The efficiency of using the maleic anhydride as compatibilizing of copolymers and blends, aiming to improve adhesion and hydrophobicity of polyolefins, has been widely reported in literature [55,58] . Therefore, the interface feature has significant influence on both mechanical behavior and failure process of tensile tested-specimens.…”

Section: Resultsmentioning

confidence: 99%

Fractographic and rheological characterizations of CF/PP-PE-copolymer composites tested in tensile

et al. 2017

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“…The molecular weights of the polymers were determined by intrinsic viscosity of polymer measured in decahydronaphthalene (Decalin) dilute solution at 135°C with a Cannon-Ubbelohde viscometer. The viscosity molecular weight was calculated by the Mark-Houwink equation: [η]=KM v where K=1.05 × 10 -4 and =0.80 [46,47]. UV-visible spectroscopy was investigated by Perkin-Elmer Lambda 950 UV-VIS-NIR Spectrophotometer.…”

Section: Materials and Instrumentationmentioning

confidence: 99%

Developing Polypropylene Bonded Hindered Phenol Antioxidants for Expanding Polypropylene Applications in High Temperature Conditions

Zhang¹,

C²,

Tc³

2017

J Material Sci Eng

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Polypropylene (PP) represents about a quarter of commercial plastics produced around the world. Despite its huge commercial success, PP polymer is not suitable for the applications that require long-term exposure to high temperatures (>80°C), due to its chemical and physical stability. The PP chain is prone to the oxidative chaindegradation and exhibits a relatively low material softening temperature. This paper discusses a new research approach by developing the PP-bonded hindered phenol (PP-HP) antioxidants to address this scientifically challenging issue. We have investigated two PP-HP structures, one with two methylene units adjacent to the hindered phenol group (HP-L) and one without this spacer (HP-S). In general, PP-HP polymers are advantaged with the ability to incorporate a suitable concentration of HP antioxidant groups with homogeneous distribution along the polymer chain, which provide effective protection to the PP chains from oxidative degradation. In addition, the specific PP-HP-L structure can also engage in a facile crosslinking reaction to form a 3-D network during the oxidation reaction. In one accelerated oxidation test in air at 190-210°C, the regular commercial PP polymer (containing common antioxidants and stabilizers) degrades within a few minutes; a PP-HP-L copolymer with about 1 mol% HP-L group shows almost no detectable weight loss after 24 hrs. In an ASTM endurance test at 140°C in air, the commercial PP shows 1% weight loss within about 10 days. On the other hand, the PP-HP-L polymer lasts for more than 30 years. Overall, the experiment results present the potential of expanding PP applications into a much higher temperature range (>140°C) under oxygen oxidative environments.

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Synthesis of maleic anhydride grafted polyethylene and polypropylene, with controlled molecular structures

Cited by 80 publications

References 32 publications

Effect of nitroxyl-based radicals on the melt radical grafting of maleic anhydride onto polyethylene in presence of a peroxide

Effect of nitroxyl-based radicals on the melt radical grafting of maleic anhydride onto polyethylene in presence of a peroxide

Fractographic and rheological characterizations of CF/PP-PE-copolymer composites tested in tensile

Developing Polypropylene Bonded Hindered Phenol Antioxidants for Expanding Polypropylene Applications in High Temperature Conditions

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