Synthesis and Characterization of Semicrystalline Polyethylene‐graft‐Poly(acrylic acid) Copolymers

Abstract

Hydrophilic polyolefin materials were prepared by grafting tBA from PE macroinitiators bearing functionalized norbornene units capable of initiating an ATRP. This method produced semicrystalline graft copolymers (PE‐graft‐PtBA) with narrow molecular weight distributions (1.2–1.4) and tunable tBA content (2–21 mol‐%). Incorporation of tBA resulted in a decrease in crystallinity, but little change in the melting point of the products. Subsequently, the tBA moieties were converted into acrylic acid units through chemical and thermal means to generate PE‐graft‐PAA copolymers. The increased hydrophilicity of the resulting materials was verified by ATR‐IR, solid‐state 13C NMR spectroscopy, contact angle measurements, and TGA.magnified image

Visible Light-Induced Grafting from Polyolefins

“…Hydrolysis was conducted by dissolving the polymer in dichloromethane (DCM) at room temperature followed by the addition of excess trifluoroacetic acid (TFA). 25 It was previously reported 26 that PE-g-PtBA materials were insoluble in DCM. In our case, the remaining Br-groups initially present in poly(COE-Br) facilitated solubility of the graft copolymer in the halogenated solvent.…”

Structural, Mechanical and Flammability Characterization of Crosslinked Talc Composites with Different Particle Sizes

“…However, this technique has some limitations (e.g., crosslinking effect, degradation of polymeric chains or high degree of volatilization). A better effect can be achieved by using reactive polar monomers [17][18][19][20].…”

Synthesis of poly(ethylene-co-vinyl alcohol)-g-polystyrene graft copolymer and their applications for ordered porous film and compatibilizer

“…The functionalized polyolefin graft copolymers are mainly prepared by three methodologies: grafting from, grafting onto, and grafting through approaches. Diverse functionalized polyolefin graft copolymers with functional polymer segment such as polystyrene (PS), poly(methyl methacrylate), polyacrylate, and poly(ε‐caprolactone), and so forth have been synthesized successfully via the approaches above‐mentioned.…”

“…Diverse functionalized polyolefin graft copolymers with functional polymer segment such as polystyrene (PS), poly(methyl methacrylate), polyacrylate, and poly(ε‐caprolactone), and so forth have been synthesized successfully via the approaches above‐mentioned. The combination of olefin/functional monomer coordinative copolymerization with controlled/“living” radical polymerizations has been confirmed to be efficient in the grafting from methodology targeting functionalized polyolefin graft copolymer . In comparison with the side‐chain functionalized polyolefin synthesized by olefin coordinative polymerization with functional monomer in special catalyst/cocatalyst systems, some commercial functionalized polyolefin such as EVA, P(E‐ co ‐GMA), and PO‐ g ‐MAn, and so forth can act as better candidates for the synthesis of functionalized polyolefin graft copolymer via grafting from approach because of their adjustable content of functional side chain and cheap price.…”

“…The combination of olefin/functional monomer coordinative copolymerization with controlled/ "living" radical polymerizations has been confirmed to be efficient in the grafting from methodology targeting functionalized polyolefin graft copolymer. [12][13][14][15][16][17][18][19][20] In comparison with the side-chain functionalized polyolefin synthesized by olefin coordinative polymerization with functional monomer in V C 2015 Wiley Periodicals, Inc. special catalyst/cocatalyst systems, some commercial functionalized polyolefin such as EVA, 8 P(E-co-GMA), 9 and PO-g-MAn, 11 and so forth can act as better candidates for the synthesis of functionalized polyolefin graft copolymer via grafting from approach because of their adjustable content of functional side chain and cheap price. EVA copolymers, industrialized by high-pressure bulk polymerization of ethylene and vinyl acetate, have a wide range of practical applications in different fields such as electrical insulation, cable jacketing and repair, component encapsulation and waterproofing, corrosion protection, packaging of components and shoes, and so forth.…”