Fracture behaviour of polypropylene/glass bead elastomer composites by using the essential work-of-fracture method
Fracture behaviour of polypropylene/glass bead elastomer composites by using the essential work-of-fracture method
复制标题
DOI：
10.1023/a:1004345017105
复制
发表时间：
1998
影响因子：
4.5
通讯作者：
D. Mouzakis;F. Stricker;Rolf Mülhaupt;J. Karger-Kocsis
中科院分区：
文献类型：
--
作者：
D. Mouzakis;F. Stricker;Rolf Mülhaupt;J. Karger-Kocsis
研究了等规聚丙烯玻璃微珠（GB）与苯乙烯/乙烯-丁烯/苯乙烯型弹性体（SEBS）共混物在室温和v=1 mm min-1十字头速度下的平面应力静态断裂响应。GB的体积分数保持恒定（10体积%），而弹性体的体积分数分别设定为5体积%和20体积%。从约1 mm厚的压制片材上切下不同韧带的深双边切口试样，并在环境温度下进行拉伸试验。在现场研究了塑性区和加工区的发展，即，在样本加载过程中，通过光学显微镜和红外热成像技术进行观察。从骨折的比功与韧带长度图，确定骨折部件的基本功和非基本功。事实证明，基本的断裂功方法对于这些混合复合材料非常有效。断裂的特定基本功，我们，随着橡胶改性剂的量的增加而增加，但取决于它的类型。接枝改变了复合材料的形态（SEBS-g-MA覆盖了GB，而SEBS作为额外的分散相存在），并影响了基本（轻微）和非基本或塑性工作（相当大）条款。已确定SEBS-g-MA是一种不如SEBS有效的增韧剂，因为相关失效模式存在显著差异。© 1998年查普曼和霍尔
The plane-stress static fracture response of blends composed of isotactic polypropylene glass beads (GBs) and an elastomer of styrene/ethylene–butylene/styrene type (SEBS) in both the ungrafted state and the grafted state with maleic acid anhydride (SEBS-g-MA) was studied at room temperature and v=1 mm min-1 cross-head speed. The volume fraction of GBs was kept constant (10 vol%) whereas that of the elastomer was set for 5 and 20 vol%, respectively. Deeply double edge-notched specimens of different ligaments were cut from pressed sheets of about 1 mm thickness and subjected to tensile tests at ambient temperature. The development of the plastic and process zone was studied in situ, i.e., during loading of the specimens, by light microscopy and infrared thermography. From the specific work of fracture versus ligament length plots, the essential and non-essential work of fracture components were determined. It was established that the essential work-of-fracture approach works well for these hybrid composites. The specific essential work of fracture, we, increased with increasing amount of the rubbery modifier but depended on its type. Grafting changed the morphology of the composites (SEBS-g-MA covered the GBs, whereas SEBS was present as an additional dispersed phase) and affected both the essential (slightly) and the non-essential or plastic work (considerably) terms. It was established that SEBS-g-MA is a less efficient toughener than SEBS because of the substantial differences in the related failure modes. © 1998 Chapman & Hall