Effect of structure and composition on physico‐mechanical properties of methyl methacrylate/alkyl (meth)acrylate copolymers

Abstract

The paper describes the fabrication of cast acrylic sheets by copolymerizing a prepolymer syrup of methyl methacrylate (MMA) with varying amounts (1 -20 wt.-To) of 2-ethylhexyl methacrylate (EHMA), n-hexyl methacrylate (HMA), 2-ethylhexyl acrylate (EHA) and n-hexyl acrylate (HA). The effect of structure of copolymer on light transmittance, density and mechanical properties was evaluated. Tensile strength and storage modulus decreased with increasing comonomer content. Strain increased significantly in the case of MMA/EHA and MMA/HA copolymer sheets having 15 and 20 wt.-% of comonomer. Softening temperature of copolymer samples was determined using dynamic mechanical thermal analysis. Heat deflection temperature under flexural load and softening temperature decreased with increasing comonomer content in copolymer. ZUSAMMENFASSUNG:Methylmethacrylat (MMA) mit einem Prepolymergehalt von 6-8% wurde mit unterschiedlichen Anteilen (1 -20%) 2-Ethylhexylmethacrylat (EMMA), n-Hexylmethacrylat (HMA), 2-Ethylhexylacrylat (EHA) oder n-Hexylacrylat (HA) copolymerisiert. Aus den erhaltenen Copolymeren wurden Folien hergestellt, an denen der Ein-fluR der Copolymerstruktur auf Lichtdurchlassigkeit, Dichte und mechanische Eigenschaften ermittelt wurde. Zugfestigkeit und Speichermodul nahmen mit zunehmendem Comonomergehalt ab. Die Dehnung stieg im Fall von MMA/EHA-und MMA/HA-Copolymerfolien mit 15 und 20 Gew.-Yo Comonomeranteil merklich an. Mittels DMTA wurde die Erweichungstemperatur der Copolymeren bestimmt. Die HDT und die Erweichungstemperatur nahmen unter Biegebelastung rnit steigendem Comonomergehalt der Copolymeren ab.

Synthesis, characterizations and thermal behavior of methyl methacrylate and N‐(p‐carboxyphenyl) methacrylamide/acrylamide copolymers

“…In our earlier article [1][2][3][4][5][6][7][8][9][10][11][12][13][14] we reported the copolymerization of methyl methacrylate (MMA) with a variety of vinyl monomers, such as alkyl (meth)acrylates and N-aryl maleimides, that have electron donating or electron withdrawing groups on the phenyl ring. The nature and the position of the substituent in N-aryl maleimides and the length and nature of the alkyl group (linear or branched) in the side chain of alkyl (meth)acrylates was investigated to study the effect of the structure of the comonomers on the copolymerization, thermal, and physicomechanical behavior.…”

Synthesis, characterizations and thermal behavior of methyl methacrylate andN-(p-carboxyphenyl) methacrylamide/acrylamide copolymers

“…In our earlier article1–14 we reported the copolymerization of methyl methacrylate (MMA) with a variety of vinyl monomers, such as alkyl (meth)acrylates and N ‐aryl maleimides, that have electron donating or electron withdrawing groups on the phenyl ring. The nature and the position of the substituent in N ‐aryl maleimides and the length and nature of the alkyl group (linear or branched) in the side chain of alkyl (meth)acrylates was investigated to study the effect of the structure of the comonomers on the copolymerization, thermal, and physicomechanical behavior.…”