Reactive Blending of Poly(l-lactide) and Chemically-Modified Starch Grafted with a Maleic Anhydride-Methyl Methacrylate Copolymer

2015 ◽  
Vol 354 (1) ◽  
pp. 340-346 ◽  
Author(s):  
Ratthaphat Bunkerd ◽  
Robert Molloy ◽  
Winita Punyodom ◽  
Runglawan Somsunan
Keyword(s):  
Maleic Anhydride ◽  
Methyl Methacrylate ◽  
Modified Starch ◽  
Reactive Blending ◽  
Chemically Modified ◽  
Methacrylate Copolymer

Reactions of macroions with ester and carboxylic groups of polymers

1987 ◽  
Vol 52 (9) ◽  
pp. 2194-2203
Author(s):  
Miloslav Kučera ◽  
Dušan Kimmer ◽  
Karla Majerová ◽  
Josef Majer
Keyword(s):  
Maleic Anhydride ◽  
Acrylic Acid ◽  
Methyl Methacrylate ◽  
Bond Formation ◽  
Covalent Bond ◽  
The Other ◽  
Poly Methyl Methacrylate ◽  
Other Hand ◽  
Carboxylic Groups ◽  
Poly Acrylic Acid

In the reaction of dianions with poly(methyl methacrylate), only an insignificant amount of insoluble crosslinked product is obtained. If, however, the concentration of grafting dianions approaches that of ester groups, the amount of poly(methyl methacrylate) which may thus be crosslinked becomes quite significant. Dications, too, can bring about crosslinking of only an insignificant number of poly(methyl methacrylate) chains. Carboxylic groups in poly(acrylic acid) react with dianions and dications in an anhydrous medium similarly to ester groups. On the other hand, in the presence of a cocatalytic amount of water dications are more readily bound to carboxylic groups, forming a covalent bond. The relatively highest efficiency was observed in the bond formation between dication and the poly[styrene-alt-(maleic anhydride)], both in an anhydrous medium and in the presence of H2O.

scholarly journals Effect of Added Salt on Disordered Poly(ethylene oxide)-Block-Poly(methyl methacrylate) Copolymer Electrolytes

2021 ◽  
Vol 54 (3) ◽  
pp. 1414-1424
Author(s):  
Neel J. Shah ◽  
Sajjad Dadashi-Silab ◽  
Michael D. Galluzzo ◽  
Saheli Chakraborty ◽  
Whitney S. Loo ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Methacrylate Copolymer ◽  
Added Salt

Miscibility and phase behaviour of methyl methacrylate copolymer and polycarbonate blends

Polymer ◽  
1997 ◽  
Vol 38 (5) ◽  
pp. 1073-1079 ◽  
Author(s):  
Takashi Ohnaga ◽  
Toshiaki Sato ◽  
Shiro Nagata
Keyword(s):  
Methyl Methacrylate ◽  
Phase Behaviour ◽  
Methacrylate Copolymer

Synthesis and molecular weights of metal (styrene-methyl methacrylate) copolymer. III

1992 ◽  
Vol 27 (4) ◽  
pp. 383-388 ◽  
Author(s):  
Galo C�rdenas T ◽  
Camilo Retamal C ◽  
Kenneth J. Klabunde
Keyword(s):  
Methyl Methacrylate ◽  
Molecular Weights ◽  
Methacrylate Copolymer

scholarly journals Sericin cocoon bio-compatibilizer for reactive blending of thermoplastic cassava starch

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Thanongsak Chaiyaso ◽  
Pornchai Rachtanapun ◽  
Nanthicha Thajai ◽  
Krittameth Kiattipornpithak ◽  
Pensak Jantrawut ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Crystal Size ◽  
Thermoplastic Starch ◽  
Cassava Starch ◽  
Chain Extension ◽  
Amino Groups ◽  
Reactive Blending ◽  
Elongation At Break ◽  
Small Crystal Size

AbstractCassava starch was blended with glycerol to prepare thermoplastic starch (TPS). Thermoplastic starch was premixed with sericin (TPSS) by solution mixing and then melt-blended with polyethylene grafted maleic anhydride (PEMAH). The effect of sericin on the mechanical properties, morphology, thermal properties, rheology, and reaction mechanism was investigated. The tensile strength and elongation at break of the TPSS10/PEMAH blend were improved to 12.2 MPa and 100.4%, respectively. The TPS/PEMAH morphology presented polyethylene grafted maleic anhydride particles (2 μm) dispersed in the thermoplastic starch matrix, which decreased in size to approximately 200 nm when 5% sericin was used. The melting temperature of polyethylene grafted maleic anhydride (121 °C) decreased to 111 °C because of the small crystal size of the polyethylene grafted maleic anhydride phase. The viscosity of TPS/PEMAH increased with increasing sericin content because of the chain extension. Fourier-transform infrared spectroscopy confirmed the reaction between the amino groups of sericin and the maleic anhydride groups of polyethylene grafted maleic anhydride. This reaction reduced the interfacial tension between thermoplastic starch and polyethylene grafted maleic anhydride, which improved the compatibility, mechanical properties, and morphology of the blend.

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