scholarly journals Acyloxyimide derivatives as efficient promoters of polyolefin C–H functionalization: application in the melt grafting of maleic anhydride onto polyethylene

2019 ◽  
Vol 10 (31) ◽  
pp. 4336-4345 ◽  
Author(s):  
Mamy Daniel Rakotonirina ◽  
Marc Baron ◽  
Didier Siri ◽  
Anouk Gaudel-Siri ◽  
Sébastien Quinebeche ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Melt Grafting

Acyloxyimides as a new H-abstracting agent have been developed for the radical grafting of maleic anhydride (MA) onto polyethylene in the melt state.

In the melt, grafting of polycarbonate onto polystyrene-block -poly(ethylene-butylene)-block -polystyrene-grafted -maleic anhydride: Reactive extrusion

2013 ◽  
Vol 54 (11) ◽  
pp. 2660-2668
Author(s):  
Celine Chevallier ◽  
Frederic Becquart ◽  
Cyril Benoit ◽  
Jean-Charles Majeste ◽  
Mohamed Taha
Keyword(s):  
Maleic Anhydride ◽  
Reactive Extrusion ◽  
Melt Grafting ◽  
Poly Ethylene

scholarly journals Maleic Anhydride-Grafted Isotactic Polybutene-1 and Modified Polyamide 6

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 872 ◽  
Author(s):  
Yongxian Zhao ◽  
Chen Ma ◽  
Shijie Cheng ◽  
Wei Xu ◽  
Yuejuan Du ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Crystallization Rate ◽  
Polyamide 6 ◽  
Melt Flow Rate ◽  
Elongation At Break ◽  
Melt Grafting ◽  
Relative Molecular Weight ◽  
Two Phases ◽  
Optimized Conditions ◽  
Dsc Curves

Maleic anhydride (MAH)–divinyl benzene (DVB) multi-monomer melt-grafting onto isotactic polybutene-1 (iPB-1) was carried out in a torque rheometer. The effects of dicumyl peroxide (DCP), MAH, and DVB concentrations, and temperature, on the reaction, were investigated. The optimized conditions were 170 °C, DVB/MAH = 4:6 (mass ratio). DVB as a comonomer enhanced the grafting degree (Gd) and grafting efficiency (Ge) of iPB-g-MAH better than styrene. The initiator DCP had little effect on Gd as its concentration over 0.2 phr, but the grafts’ melt flow rate (MFR) increased significantly, and relative molecular weight decreased remarkably with increased DCP concentration. With increasing Gd, the contact angle of grafts with water decreased, and there was a larger crystallization rate. The study of iPB-1 and iPB-g-MAH (Gd = 1.5%)-modified polyamide 6 (PA6) showed that iPB-g-MAH had an obviously toughening effect on PA6. With increasing iPB-g-MAH concentration, the blends of impact strength and elongation at break increased obviously, tensile strength decreased slightly, and MFR decreased prominently, which greatly slowed the processing degradation of PA6. The properties of iPB-1/PA6 blends deteriorated. Both DSC curves and SEM micrographs confirmed that PA6/iPB-g-MAH blends had much better compatibility than PA6/iPB. The reason was that the anhydride group in iPB-g-MAH reacted with amide group in PA6 to improve the compatibility between two phases, and iPB-g-MAH is an excellent modifier for PA6.

Melt-grafting mechanism study of maleic anhydride onto polypropylene with 1-decene as the second monomer

2011 ◽  
Vol 121 (6) ◽  
pp. 3724-3732 ◽  
Author(s):  
Caihong Lei ◽  
Dahua Chen ◽  
Bo Wu ◽  
Yunqi Xu ◽  
Shanliang Li ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Mechanism Study ◽  
Melt Grafting

Functionalization of isotactic polypropylene with maleic anhydride by reactive extrusion: mechanism of melt grafting

Polymer ◽  
2001 ◽  
Vol 42 (13) ◽  
pp. 5549-5557 ◽  
Author(s):  
Dean Shi ◽  
Jinghui Yang ◽  
Zhanhai Yao ◽  
Yong Wang ◽  
Hongliang Huang ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Isotactic Polypropylene ◽  
Reactive Extrusion ◽  
Melt Grafting ◽  
Extrusion Mechanism

Melt grafting of poly(ethylene-vinyl acetate) copolymer with maleic anhydride

2006 ◽  
Vol 102 (1) ◽  
pp. 841-846 ◽  
Author(s):  
Jun Yin ◽  
Jun Zhang ◽  
Yu Yao
Keyword(s):  
Maleic Anhydride ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Melt Grafting ◽  
Poly Ethylene ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Effect of POE Grafting Degree and Compatibilization on the Properties of PBT/POE Blends

2012 ◽  
Vol 554-556 ◽  
pp. 2049-2053
Author(s):  
Jian Bing Guo ◽  
Kai Zhou Zhang
Keyword(s):  
Mechanical Properties ◽  
Fourier Transform ◽  
Maleic Anhydride ◽  
Infrared Spectra ◽  
Polybutylene Terephthalate ◽  
Melt Grafting ◽  
Phase Size ◽  
Ft Ir ◽  
Poly Ethylene ◽  
Grafting Degree

Poly (ethylene 1-octene) (POE) was functionalized to varying degrees with maleic anhydride (MA) by melt grafting processes. Fourier transform infrared spectra (FT-IR) confirmed that maleic anhydride was successfully grafted onto the POE. The POE-g-MAH elastomers were used to toughen Polybutylene terephthalate(PBT). The mechanical properties, morphology and the dispersal phase size were investigated. Results showed that the grafting degree strongly influenced the morphology, mechanical properties and the dispersal phase size. All results in this paper were consistent, and showed good interaction between POE and PBT, which was proven by the mechanical properties of blends.

Polymeric Antioxidant Based on Natural Rubber Grafted with N-(4-Hydroxyphenyl)maleimide

2012 ◽  
Vol 488-489 ◽  
pp. 211-215 ◽  
Author(s):  
Pairote Klinpituksa ◽  
Sittaporn Somkieowan ◽  
Wae Asae Waehamad ◽  
Natinee Lopattananon
Keyword(s):  
Tensile Strength ◽  
Maleic Anhydride ◽  
Natural Rubber ◽  
Ftir Spectroscopy ◽  
Accelerated Aging ◽  
Elongation At Break ◽  
Optimal Amount ◽  
Melt Grafting ◽  
Natural Rubber Vulcanizates

A novel rubber bound antioxidant NR-g-HPM was prepared by melt grafting HPM (N-(4-hydroxyphenyl)maleimide) onto natural rubber in a brabender plasticorder. HPM was synthesized from p-aminophenol and maleic anhydride. The yield was found to be over 80%. The grafting products were observed with FTIR spectroscopy and TGA. The ageing resistance of natural rubber vulcanizates using NR-g-HPM was studied. It was found that an optimal amount of NR-g-HPM (6 phr) gave about 25% better tensile strength and elongation at break as compared with conventional BHT addition, for filled natural rubber after 48 h of accelerated aging.

Melt grafting of maleic anhydride onto an ethylene–propylene–diene terpolymer (EPDM)

2000 ◽  
Vol 36 (7) ◽  
pp. 1419-1429 ◽  
Author(s):  
Olga P Grigoryeva ◽  
József Karger-Kocsis
Keyword(s):  
Maleic Anhydride ◽  
Ethylene Propylene ◽  
Melt Grafting ◽  
Ethylene Propylene Diene Terpolymer
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