cn101463563a modified starch/polyacrylamide textile in america

cn101463563a modified starch/polyacrylamide textile in america
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  • How are cross-linked acrylamide starch copolymers synthesized?
  • The cross-linked acrylamide starch copolymers were synthesized by free radical initiated polymerization of potato starch (St, 2.28 g) with acrylamide (AM content from 10 to 40 wt.% on the starch weight).
  • Does cationic starch modification affect acrylamide grafting efficiency?
  • The effect of cationic starch modification was examined using unmodified and cationic dent starch (≈23% amylose) and waxy maize starch (≈2% amylose). For a fixed acrylamide/starch feed ratio, conversion, graft content, and grafting efficiency were essentially unaffected by starch type or modification.
  • Does methyl acrylate graft change crystalline regions of gelatinized starch?
  • FT-IR, elemental analysis and NMR confirmed that methyl acrylate (MA) was grafted onto starch successfully. DSC results showed the graft reaction had changed the crystalline regions of the gelatinized starch.
  • Is cationic modification of starch a way to tailor graft copolymers?
  • These results indicate that cationic modification of starch enhances formation of grafting sites, resulting in graft copolymers with more grafts of lower molecular compared to unmodified starch. Cationic modification may therefore be a way to tailor the properties of starch–PAAm graft copolymers.