Korolev Alexander, Mishnev Maxim, Ulrikh Dmitrii, Zadorin Alexander
Department of Building Construction and Structures, South Ural State University, 454080 Chelyabinsk, Russia.
Department of Town Planning, Engineering Systems, and Networks, South Ural State University, 454080 Chelyabinsk, Russia.
Polymers (Basel). 2023 Jan 30;15(3):699. doi: 10.3390/polym15030699.
This research was completed in the development of studies devoted to relations between the elastic modulus (MoE) and thermal expansivity (CTe) of different materials. This study, based on experimental data, confirmed the models of the relations between MoE and CTe under normal and heating temperatures for thermosetting epoxy polymers and glass-fiber FRPs in two variants (unfilled and filled by mineral additives), after the usual glassing and prolonged thermal conditioning (thermo-relaxation). The experiment was based on dilatometric and elastic deformation testing. Two models of MoE/CTe were tested: Barker's model and our authors relaxation model (MoE = f(CTe)), which is based on previous modelling of the non-linearity of the physical properties of polymers' supramolecular structures. The result show that the models' constants depend on composition; Barker's model is applicable only to polymers with satisfying agreement degrees in the range 10-20%; our model is applicable to polymers and FRPs with satisfying agreement degrees in the range of 6-18%.
本研究是在致力于研究不同材料的弹性模量（MoE）与热膨胀系数（CTe）之间关系的研究发展过程中完成的。本研究基于实验数据，在常规玻璃化和长时间热调节（热松弛）之后，证实了热固性环氧聚合物和玻璃纤维增强塑料（FRP）在两种变体（未填充和填充矿物添加剂）下，正常温度和加热温度下MoE与CTe之间关系的模型。该实验基于膨胀测量和弹性变形测试。测试了两种MoE/CTe模型：巴克模型和我们作者的松弛模型（MoE = f(CTe)），后者基于先前对聚合物超分子结构物理性质非线性的建模。结果表明，模型常数取决于组成；巴克模型仅适用于符合度在10 - 20%范围内的聚合物；我们的模型适用于符合度在6 - 18%范围内的聚合物和FRP。
