Synthesis of functional polypropylene via solid‐phase grafting soft vinyl monomer and its mechanism

Abstract

Solid-phase grafting of a soft vinyl monomer, butyl methylacrylate (BMA), onto polypropylene (PP) matrixes with 2,2 0 -azobisisobutyronitrile (AIBN) as initiator was carried out to enhance the polarity of polymer. Soft vinyl monomer was a novel notion in grafting modification of PP. Effects of swell time, BMA concentration, AIBN concentration, grafting reaction time, and temperature on grafting percentage (G p ) and grafting efficiency (G e ) were examined. The optimal conditions of grafting reaction were obtained: swell time of 60 min, BMA concentration of 6 wt %, AIBN concentration of 0.05 wt %, reaction temperature of 85 C, and reaction time of 2 h. The grafting samples were investigated by such characterization techniques as Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and scanning electron microscope (SEM) analysis. FTIR results indicated that BMA was actually grafted onto PP backbone. TGA results showed that the decomposition temperature increases with addition of BMA into PP backbone. SEM results indicated that the surfaces of PP-g-BMA had a markedly bumpy texture, whereas the pure PP surface was very smooth. Water contact angle results showed that the polarity and hydrophilicity of PP were improved effectively. Compared with the traditional monomer MAH, G p , and G e , melt flow rate and mechanical property results all indicated that the soft vinyl monomer had a many advantages in the modification of PP. In the end, the mechanism of solid grafting was discussed.

Multi functionalization of polypropylene with controlled degradation and its structure characterization

“…In order to enlarge its potential application filed, functionalization of iPP has been studied intensively by grafting of polar groups onto the PP backbone. The grafting of various monomers onto iPP have been reported by a number of groups, including acrylic acid (AA), 1,2 maleic anhydrides (MAH), [3][4][5][6][7][8][9] alkanethiols, 10 BMA, 11 glycidyl methacrylate (GMA). [12][13][14][15][16][17] In recent years, GMA used as a functionalized monomer has been received more and more attention, GMA is a very interesting monomer because of its bifunctional character: a free-radical reactive double bond together with an epoxy group that can react with a number of other functional groups such as carboxyl, hydroxyl, anhydride, and amine end groups.…”

A facile, green, versatile protocol to prepare polypropylene‐g‐poly(methyl methacrylate) copolymer by water‐solid phase suspension grafting polymerization using the surface of reactor granule technology polypropylene granules as reaction loci

“…In the PP‐ g ‐PMMA copolymers, the graft‐PMMA and homo‐PMMA do not fill the whole micropores of PP, and acetone is a good solvent of PMMA [Figure 1(B)]. Therefore the long and rigorous extraction can remove the PMMA homopolymers completely 31. Figure 1(D) shows the SEM image of the grafting product extracted in acetone for 24 h. According to the picture, fibril polymers become a smooth film covering on the PP subparticles.…”

Synthesis and biocidal activity of novel N-halamine hydantoin-containing polystyrenes

“…Chemical modification of such monomers by introduction of new substituents allows to obtain materials with desired properties for special applications: polymers for surgery, agriculture and packaging industry, thermoresistant and non-flammable protective coatings (in architecture, means of transport) as well as plastics with extra high mechanical properties, excellent swelling ability (hydrogels) or lack of wettability (e.g., anti-adhesive, selfcleaning layers) (1)(2)(3)(4)(5)(6). The latest publications have demonstrated that control of polymerization mechanism and kinetics also enables the manipulation of polymer structure and properties.…”