粘弹性
聚结(物理)
材料科学
流变学
蠕动
聚合物
高分子科学
粘度
复合材料
物理
天体生物学
作者
Stephen Mazur,Donald J. Plazek
标识
DOI:10.1016/0033-0655(94)85016-x
摘要
Abstract A study was made of the coalescence of linear acrylic resins over a much greater dynamic range than previously investigated. The rate of neck growth between a sphere and a flat slab of the same material was measured in situ by optical microscopy and found to exhibit a number of features typical of polymer viscoelastic response. Results are compared with independent measurements of the melt rheology (torsional creep compliance). An analytic approximation is proposed which allows the neck-growth kinetics to be predicted from the recoverable creep compliance and viscosity of the melt. It predicts qualitative trends consistent with the limited data on molecular weight, structure, and particle size variations. This analysis helps resolve some apparent contradictions among earlier studies and implies a qualitative difference in the coalescence mechanisms for large particles (5 μm) and colloids (
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