TY - JOUR T1 - Influence of molecular weight on friction force microscopy of polystyrene and poly(methyl methacrylate) films: correlation between coefficient of friction and chain entanglement. JO - Langmuir PY - 2009/02/17 AU - Whittle TJ AU - Leggett GJ ED - DO - DOI: 10.1021/la803407e VL - 25 IS - 4 SP - 2217 EP - 2224 Y2 - 2025/04/04 ER -