2,3-Dimethyl-2,3-diphenylbutane mediated grafting of vinyltriethoxysilane to polyethylene: a novel radical initiation system

Parent, J. Scott; Cirtwill, Stacey; Penciu, Anca; Whitney, Ralph A.; Jackson, Peter

doi:10.1016/s0032-3861(02)00898-4

Cited by 15 publications

(5 citation statements)

References 23 publications

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“…In the case of EOR, which was one of the LLDPE groups, it usually had a number of short‐chain branchings in the range 20–50 methyl groups per 1000 carbons 19. For LLDPE with a similar octene content to that in the EOR used in this study (7%mol), Parent et al20 reported a structure with 31 tertiary carbons per 1000 carbons. Because of a similar structure between the two polymers used in this study and the small amount of silane (5%) used in the reaction, only a slight difference in grafting degree was found among the various blend compositions.…”

Section: Resultsmentioning

confidence: 67%

Silane‐crosslinked ethylene–octene copolymer blends: Thermal aging and crystallization study

Sirisinha

Chimdist

2008

J of Applied Polymer Sci

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Thermally stable materials can be achieved by crosslinking. This article presents the thermal aging and thermal energy storage properties of ethylene-octene copolymer (EOR) and low-density polyethylene (LDPE) blends as affected by silane crosslinking. Fourier transform infrared spectroscopy revealed a similar degree of silane grafting among the various blend compositions. However, the highest crosslink content was observed in EOR, whereas the lowest was found for LDPE. From melting temperature and heat of fusion data, a linear relationship between the amount of the crystalline component and the crosslink content was found. The decrease in crystallinity due to crosslinking was very limited, which implied a high thermal energy storage capacity of the silane-crosslinked products and their good mechanical properties at room temperature. Furthermore, a strong ability to retain the properties after thermal aging indicated good thermal stability of the materials.

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Section: Resultsmentioning

confidence: 67%

Silane‐crosslinked ethylene–octene copolymer blends: Thermal aging and crystallization study

Sirisinha

Chimdist

2008

J of Applied Polymer Sci

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“…Chemical modification of polyethylene by radical mediated grafting chemistry is a robust method of generating added products from commodity materials. Conventional grafting processes are initiated by oxygen‐centered radicals derived from the decomposition of organic peroxides 1, 2. Grafting polyethylene with acrylonitrile monomers by a free‐radical reaction, by either chemical radical starters3–7 or irradiation,8–12 has already been performed to initiate the process.…”

Section: Introductionmentioning

confidence: 99%

Enzyme‐mediated grafting of acrylamide to ultrahigh molecular weight polyethylene fiber: A novel radical initiation system

Zhao

Guo

Liang

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:The enzyme-mediated grafting of acrylamide (AM) to ultrahigh molecular weight polyethylene (UHMWPE) fibers using horseradish peroxidase (HRP) was demonstrated. To optimize the reaction condition, the concentrations of monomer, H 2 O 2 , the initiator, and time were varied. The grafting results were discussed and a reaction mechanism was proposed. Function groups and structural change of the graft copolymer were determined by FTIR spectroscopic and scanning electron microscopy micrographs for proof of grafting and the results were discussed. Results show that the surface of treated fiber becomes rougher than the untreated surface. Compared to unmodified fiber, modified fiber surface had significantly increased the interfacial shear strength, and carbonyl-stretching regions in the IR spectra. The interfacial shear strength of the UHMWPE fiber increased, clearly indicating that enzymaticgrafted acrylamide could significantly increase the hydrophilicity of the surfaces of UHMWPE fibers. Moreover, the hydrophilicity of treated fiber depends on the monomer concentration, the initiator concentration, and oxidizing agent concentration as well as the time of the reaction.

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“…46 The analysis of poly(ethylene-g-vinyltrimethoxysilane) by differential scanning calorimetry-successive self-nucleation and annealing (DSC-SSA) indicated that the distribution of pendant alkoxysilane grafts amongst polymer chains is not uniform. The analysis of kinetics of bicumene decomposition suggests that the initiation occurs via an autoxidation mechanism that is facilitated by the interaction of cumyl radicals with oxygen.…”

Section: Vinyltriethoxysilanementioning

confidence: 99%

Grafting

Fink¹

2005

Reactive Polymers Fundamentals and Applications

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2,3-Dimethyl-2,3-diphenylbutane mediated grafting of vinyltriethoxysilane to polyethylene: a novel radical initiation system

Cited by 15 publications

References 23 publications

Silane‐crosslinked ethylene–octene copolymer blends: Thermal aging and crystallization study

Silane‐crosslinked ethylene–octene copolymer blends: Thermal aging and crystallization study

Enzyme‐mediated grafting of acrylamide to ultrahigh molecular weight polyethylene fiber: A novel radical initiation system

Grafting

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