A coupling model for cooperative dynamics in shape memory polymer undergoing multiple glass transitions and complex stress relaxations

Wang, Xiaodong; Liu, Yuheng; Lu, Haibao; Wu, Nan; Hui, David; Fu, Yong Qing

doi:10.1016/j.polymer.2019.121785

Cited by 12 publications

(1 citation statement)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, Fox-Flory equation [19] is initially employed to characterize the glass transition temperature (Tg) and relaxation behaviors of topologically hyper-branched polymers. [14] According to the Boltzmann's hydrodynamic principle, [20][21][22] a constitutive relationship is formulated with the consideration of molecular weight, number of arms, Tg and relaxation time. The proposed model is then employed to characterize and predict hierarchical and multiple relaxations (e.g., relaxations of the core and arms, respectively) and their multi-SMEs in hyper-branched polymers.…”

Section: Introductionmentioning

confidence: 99%

A Methodology of Hydrodynamic Complexity in Topologically Hyper‐Branched Polymers Undergoing Hierarchical Multiple Relaxations

Wang

Hossain

et al. 2020

Macro Chemistry & Physics

Self Cite

View full text Add to dashboard Cite

A hydrodynamic model was proposed to describe conformational relaxation of molecules, viscoelasticity of arms and hierarchical multiple-shape memory effect (multi-SME) of hyperbranched polymer. Fox-Flory and Boltzmann's principles were employed to characterize and predict the hierarchical relaxations and their multi-SMEs in hyper-branched polymers. A constitutive relationship among relaxation time, molecular weight, glass transition temperature and viscoelastic modulus was then formulated. Results revealed that molecular weight and number of arms of the topologically hyper-branched polymers significantly influence their hydrodynamic relaxations and shape memory behaviors. The effectiveness of model has been demonstrated by applying it to predict mechanical and shape recovery behaviors of hyper-branched polymers, and the theoretical results show good agreements with the experimental ones. We expect this study provides an effective guidance on designing multi-SME in topologically hyper-branched polymers.

show abstract