Investigation of diffusion in polymer melts by differential scanning calorimetry

Tracking the interdiffusion of polymers at a molecular level by1H dipolar filter solid-state NMR under fast magic angle spinning

“…The diffusion mechanism and the ways to measure diffusion coefficient have been well established. 2,24,27 Yang et al simulated the merging process of two polyethylene globules, and a two stage process including a wetting and an interpenetration process was recognized. 28 To our knowledge, however, the beginning of the diffusion process has not been investigated experimentally due to the limitation of techniques.…”

“…Diffusion kinetics and molecular mechanism have been extensively studied by various techniques, including differential scanning calorimetry (DSC), forward recoil spectrometry (FRES), secondary ion mass spectroscopy (SIMS), X-ray microanalysis, rheological tools, neutron reflectometry, confocal Raman microspectroscopy and pulse field gradient (PFG) nuclear magnetic resonance (NMR) techniques. [2][3][4][5][6] The polystyrene/poly(2,6-dimethyl-1,4-phenylene oxide) (PS/PPO) blend has attracted considerable attention due to its excellent performance and good compatibility in all blending proportions and over a considerable range of molecular weights. 7 In particular, the interdiffusion kinetics and compatibility of PS and PPO have been extensively studied for many years.…”

“…9 Bittrich et al successfully measured the self diffusion coefficient of PS melt by DSC. 2 Bousmina et al studied the interface diffusion behavior of PS/PS utilizing a rheological technique. 5 Their results revealed that the diffusion mechanism was strongly affected by the initial configuration distribution of the chain ends before establishing the PS/PS contact.…”