Prediction of the creep of heterogeneous polymer blends: Rubber‐toughened polypropylene/poly(styrene‐co‐acrylonitrile)

Abstract

A previously proposed predictive format for elastic, storage and loss moduli is extended for the time‐dependent compliance Db(t) of polymer blends. The format employs a two‐parameter equivalent box model (EBM) and the data on the phase continuity of components in blends obtained by using modified general equations of the percolation theory. As input data, the compliances D1(t) and D2(t) and the critical volume fractions V1cr and V2cr (delimiting the interval of phase co‐continuity in blends) of components are sufficient. To describe the effect of time on D1(t), D2(t) and Db(t) within the linear stress‐strain region, a routinely used empirical equation was found suitable. Applicability of the proposed format is demonstrated on rubbertoughened polypropylene/poly(styrene‐co‐acrylonitrile) blends consisting of components with markedly different viscoelastic properties. The proposed predictive format fits fairly well the creep behavior of blends over the interval 0.1‐10,000 minutes.

Investigation the effect of processing condition and dispersed phase content on rheology–morphology relationship in polypropylene/polyethylene terephthalate microfibrillar composite

“…A dispersed polymer component that exhibits creep, yield, and irreversible deformation is very different from a conventional mineral filler or reinforcement used in typical composites. Therefore, the study of the behavior of MFCs containing polymer fibrils is of particular importance 62–64 . In order to determine the contribution of fibrillar structure in elasticity and also to evaluate the recovery behavior of Fbr samples prepared under different kinetic conditions, creep‐recovery measurements were performed on these samples.…”

“…Therefore, the study of the behavior of MFCs containing polymer fibrils is of particular importance. [62][63][64] In order to determine the contribution of fibrillar structure in elasticity and also to evaluate the recovery behavior of Fbr samples prepared under different kinetic conditions, creep-recovery measurements were performed on these samples.…”

Phase structure and tensile creep of recycled poly(ethylene terephthalate)/short glass fibers/impact modifier ternary composites

“…Of numerous empirical functions proposed for g 1 (t) and g 2 (σ), the Equation (3) was found suitable for both short-and longterm tensile creeps of polypropylene and its blends [24][25][26]:…”