Preparation of poly(methyl methacrylate‐co‐butyl methacrylate) nanoparticles and their reinforcing effect on natural rubber

Abstract

Poly(methyl methacrylate‐co‐butyl methacrylate) [P(MMA‐co‐BMA)] nanoparticles were synthesized via emulsion polymerization, and incorporated into natural rubber (NR) by latex compounding. Monodispersed, core‐shell P(MMA‐co‐BMA)/casein nanoparticles (abbreviated as PMBMA‐CA) were produced with casein (CA) as surfactant. The chemical structure of P(MMA‐co‐BMA) copolymers were confirmed by 1H‐NMR and FTIR analyses. Transmission electron microscopy demonstrated the core–shell structure of PMBMA‐CA, and PMBMA‐CA homogenously distributed around NR particles, indicating the interaction between PMBMA‐CA and NR. As a result, the tensile strength and modulus of NR/PMBMA‐CA films were significantly enhanced. The tensile strength was increased by 100% with 10% copolymer addition, when the molar ratio of MMA:BMA was 8:2. In addition, scanning electron microscopy and atomic force microscopy results presented that the NR/PMBMA‐CA films exhibited smooth surfaces with low roughness, and PMBMA‐CA was compatible with NR. FTIR‐ATR analyses also suggested fewer PMBMA‐CA nanoparticles migrated out of NR. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43843.

Deproteinized natural rubber‐graft‐polyacrylamide‐graft‐polystyrene (DPNR‐g‐PAM‐g‐PSt): Preparation and performance study of a new water swellable rubber

“…The modification of NR by grafting can enhance its advantages while compensating for these disadvantages. To date, materials such as acrylic acid, 4,5 Styrene (St), [6][7][8][9] Acrylonitrile (AN), 10,11 Methyl methacrylate, 12 maleic anhydride, 13 and Hydroxyethyl methacrylate [14][15][16] have been widely used for grafting of NR. It is important to remove proteins from natural latex before grafting because some people are allergic to NR products containing proteins and because proteins can terminate the free radicals involved in the reaction.…”

Study on the storage performance of MG30/NRL co-blended latexes

“…NRL is a colloidal dispersion mainly composed of 30-45% rubber particles. NRL particles are covered with proteins (ω-terminus) and phospholipids (αterminus), which makes NRL colloidal stability [5,6]. NRL has excellent lm forming properties [7] and has been widely used in the manufacture of impregnated products such as gloves, condoms and catheters [8][9][10], but this lm has low hardness and relatively poor tear strength.…”

Synthesis of two-phase polymer particles in supercritical carbon dioxide

“…Core-shell polymeric particles are desirable for a wide range of applications such as drug delivery, 31 electrophoretic displays, 32 and as impact modifiers. 33 McAllister et al reported the synthesis of core-shell particles consisting of poly(2-(dimethyl amino) ethyl methacrylate) (PDMAEMA) and PMMA via a multi-stage dispersion polymerisation. 32 PMMA particles were modified in scCO 2 to give a core-shell morphology with domains of PDMAEMA within PMMA.…”