A composition-morphology map for particle-filled blends of immiscible thermoplastic polymers

作者：Amoabeng Derrick; Roell David; Clouse Kendal M; Young Brian A; Velankar Sachin S

来源：Polymer, 2017, 119: 212-223.

DOI：10.1016/j.polymer.2017.04.009

• Cocontinuity
• Filled polymer blends
• Pendular aggregates
• Phase inversion
• Rheology

We explore the effects of adding silica particles to blends of two immiscible polymers, polyisobutylene (PIB) and polyethylene oxide (PEO) across a wide range of compositions, and particle loadings of up to 30 vol %. The silica particles have strong affinity for PEO, and hence, if there is sufficient PEO to fully engulf the particles, a combined phase of particles-in-PEO is formed. We construct a composition morphology map which reveals two microstructures that are qualitatively different from those seen in particle-free polymer blends: one in which particles are bonded together by small menisci of PEO, and the other in which a highly-filled particles-in-PEO phase percolates throughout the sample. Particles widen the composition range over which co-continuous structures appear. Overall we find that particles affect the morphology greatly when the polymer preferred by the particles (PEO) is in a minority, but only modestly when the preferred polymer is in a majority.

• 出版日期2017-6-16