Surface grafting onto polypropylene — a survey of recent developments

Singh, R. P.

doi:10.1016/0079-6700(92)90024-s

Cited by 114 publications

(17 citation statements)

References 66 publications

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“…Stereo-regular polypropylene is an important engineering material produced on a large scale using early transition metal catalysts. However, the nonpolar nature of polypropylene leads to poor surface, adhesion, dye ability, and compatibility properties due to the absence of any polar functional group in its structure [ 41 , 42 , 43 ]. In order to improve these important properties, olefin/polar monomer copolymers are desirable in both industry and academia.…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Branched Carboxylic Acid Functionalized Poly(1-octene) by α-Diimine Palladium Catalysts

et al. 2017

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Abstract:In this work, we studied propylene polymerization using some α-diimine palladium catalysts with systematically varied ligand sterics. In propylene polymerization, the ligand steric effect exhibits significant variations on the catalytic activity, polymer molecular weight, and branching density. However, the regio control for the polymer microstructure is poor. Furthermore, copolymerization of 1-octene with the highly challenging and biorenewable comonomer acrylic acid was investigated. High copolymer molecular weights and high comonomer incorporation ratios could be achieved in this system. This study provides a novel access for the direct synthesis of branched carboxylic acid functionalized polyolefins.

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Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Branched Carboxylic Acid Functionalized Poly(1-octene) by α-Diimine Palladium Catalysts

et al. 2017

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“…Polypropylene, the substrate selected for use in this study, in an unprocessed state does not have functionality allowing biomolecule attachment. However, many researchers have studied methods to surface‐modify polypropylene 20. The use of chromium(IV) oxide followed by reduction with borane21 was chosen here to create a hydroxyl‐rich surface that allowed acrylamide grafting to the hydroxyl groups through polymerization in the presence of activating ceric ions 22.…”

Section: Methodsmentioning

confidence: 99%

Control of in vivo microvessel ingrowth by modulation of biomaterial local architecture and chemistry

Sanders

Baker

Golledge

2002

J. Biomed. Mater. Res.

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We developed a method for controlling local architecture and chemistry simultaneously in biomaterial implants to control microvessel ingrowth in vivo. Porous polypropylene disks (5 mm in diameter and 40 microm thick) were plasma-coated with a fluoropolymer and then laser-drilled with 50-microm-diameter holes through their thickness. We then oxidized the disks to create hydroxyl functionality on the exposed polypropylene (inside the holes). Acrylamide was grafted to the hydroxyl groups through polymerization in the presence of activating ceric ions. Staining with toluidine blue O demonstrated that grafting occurred only inside the holes. We used the Hoffman degradation reaction to convert the amide groups of acrylamide to amine groups, and then we used ethylene glycol diglycidyl ether to attach biomolecules of interest inside the holes: secreted protein acidic and rich in cysteine (SPARC) peptide Lys-Gly-His-Lys (KGHK; angiogenic), thrombospondin-2 (TSP; antiangiogenic), or albumin (rat; neutral). In vivo testing in a rat subcutaneous dorsum model for a 3-week interval demonstrated a greater vessel surface area (p = 0.032) and a greater number of vessels (p = 0.043) in tissue local to the holes with KGHK-immobilized disks than with TSP-immobilized disks. However, differences between KGHK-immobilized and albumin-immobilized disks were less significant (p = 0.120 and p = 0.289 for the vessel surface area and number of vessels, respectively). The developed methods have potential applications in biomaterial design applications for which selective neovascularization is desired.

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“…Dimana pada metode kimia radikal bebas dilepaskan oleh inisiator seperti benzoil peroksida (BPO) atau azobisisobutironitril (AIBN). (Singh, R.P., 1992). Polipropilena adalah suatu polimer yang bersifat non polar.…”

Section: Pendahuluanunclassified

Grafting Polipropilena Dengan Maleat Anhidrida Sebagai Pengikat Silang Dengan Inisiator Benzoil Peroksida

Hidayani

2018

EKSAKTA

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Surface grafting onto polypropylene — a survey of recent developments

Cited by 114 publications

References 66 publications

Direct Synthesis of Branched Carboxylic Acid Functionalized Poly(1-octene) by α-Diimine Palladium Catalysts

Direct Synthesis of Branched Carboxylic Acid Functionalized Poly(1-octene) by α-Diimine Palladium Catalysts

Control of in vivo microvessel ingrowth by modulation of biomaterial local architecture and chemistry

Grafting Polipropilena Dengan Maleat Anhidrida Sebagai Pengikat Silang Dengan Inisiator Benzoil Peroksida

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