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Table 3 Results from the GPC analysis of degrafted PMMAM nth = ([M]o/[I]o)(M wof Methyl methacrylate)(conversion)/100 = 1.5 × 105(g/mol)

From: Grafting of Poly(methyl methacrylate) Brushes from Magnetite Nanoparticles Using a Phosphonic Acid Based Initiator by Ambient Temperature Atom Transfer Radical Polymerization (ATATRP)

Sl. no Time (h) M n × 103(g/mol) PDI % weight lossa Grafting densityb Initiator efficiency
1 3 17.6 2.46 75 0.85 0.43
2 6 27 2.39 80 0.74 0.40
3 9 32 2.36 87 1.07 0.55
4 12 42 1.94 88 0.89 0.45
5 15 50 2.00 90 0.92 0.47
  1. aDetermined by thermogravimetric analysis
  2. bGrafting density calculated using Eq. 1 in chains/nm2