Influence of Particle Size and Phase Connectivity on the Fracture Behavior of PA6/EOR Blends
Influence of Particle Size and Phase Connectivity on the Fracture Behavior of PA6/EOR Blends
复制标题
粒径和相连通性对 PA6/EOR 共混物断裂行为的影响
DOI：
10.1002/masy.201800173
复制
发表时间：
2019
影响因子：
--
通讯作者：
Bonten
中科院分区：
文献类型：
--
作者：
Bonten
研究了非混相聚酰胺6/乙烯辛烯共聚物（PA6/EOR）共混物的结构性能与断裂力学行为之间的关系。研究了PA6吸湿率对共混性能的影响。不同的共混配方会导致不同的共混形态，这些形态在颗粒大小、颗粒间距和共混物之间相连通性的强度上都有所不同。相连通性的强度由流变行为来描述。通过扫描电镜对颗粒大小和计算出的颗粒间距所定义的形貌进行了光学分析。通过动态力学分析证明了共混物的玻璃化转变温度的变化是由吸湿引起的。所有参数都与断裂力学性能有关，由断裂基本功的方法确定。用断裂基本功的方法表明，在一定的材料组合和一定的软相量下，韧性的增加只取决于颗粒的大小。然而，一个基本要求总是混合伙伴之间的强相连通性。因此，在给定的材料组合中，基体内的软相颗粒越小，韧性的增加越高。吸湿确实会在许多方面影响共混物的性能，也会导致断裂行为的改变。因此，不可能预测亲水性共混物从一种状态到另一种状态的断裂力学行为。
Structure–property relations between the blend morphology and the fracture mechanical behavior of immiscible polyamide 6/ethylene‐octene copolymer (PA6/EOR) blends are investigated. The influence of a moisture uptake of the PA6 on the blend behavior is also demonstrated. Different blend formulations lead to different blend morphologies, which vary in particle sizes, interparticle spacing, and intensity of the phase connectivity between the blend partners. The intensity of the phase connectivity is described by the rheological behavior. The morphology, defined by the particle size and the calculated interparticle spacing, is analyzed optically by a scanning electron microscope. The shift of the glass transition temperature of the blends due to moisture uptake is demonstrated via dynamical mechanical analyses. All parameters are linked to the fracture mechanical properties determined by the method of the essential work of fracture. By means of the method of the essential work of fracture it is shown that the toughness increase by a given material combination and a constant soft phase amount depends only on the particle size. However, a basic requirement is always strong phase connectivity between the blend partners. Thus, by a given material combination the smaller the soft phase particles within the matrix, the higher the increase in toughness. A moisture uptake does influence the blend properties in many ways and also leads to a change in the fracture behavior. Therefore, it is not possible to predict the fracture mechanical behavior of hydrophilic blends from one condition state to another.
聚合物断裂研究的基本工作：验证测试韧带范围的新标准
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
F. Tuba;L. Oláh;P. Nagy
通讯作者：
P. Nagy