Characteristics of the brittle/tough transition of poly(butylene terephthalate)/maleinized poly(ethylene-octene) blends determined by the essential work of fracture procedure
Characteristics of the brittle/tough transition of poly(butylene terephthalate)/maleinized poly(ethylene-octene) blends determined by the essential work of fracture procedure
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由断裂过程的基本功决定的聚对苯二甲酸丁二醇酯/马来酸化聚乙烯辛烯共混物的脆/韧转变特征
DOI：
10.1016/j.polymertesting.2009.09.001
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发表时间：
2010
期刊：
影响因子：
5.1
通讯作者：
J. Nazábal
中科院分区：
文献类型：
--
作者：
I. González;J. Eguiazábal;J. Nazábal
采用熔融共混法制备了不同马来酸酐含量的聚对苯二甲酸丁二醇酯(PBT)共混物。标准Izod冲击试验与基本断裂功程序(EWF)与共混物组成或胶粒间距离(τ)的比较表明，基本断裂功随橡胶含量的增加而稳步增加，由标准Izod技术获得的导致脆韧转变的共混物组成与使用非基本断裂功(βwp)得到的结果相似。与橡胶含量或τ相比，冲击强度曲线脆化区的韧性略有增加，但在βwp的冲击强度曲线上没有出现。在EWF曲线的韧性区，与冲击试验不同的是，韧性提高了30%，断口形貌也发生了一些变化。
Blends of poly(butylene terephthalate) (PBT) with varying contents of a maleic anhydride modified poly(ethylene-octene) were obtained by melt processing. The comparison of the standard Izod impact test with the essential work of fracture (EWF) procedure against either the blend composition or the inter-particle distance (τ) revealed that the EWF steadily increased with the rubber content, and the blend composition causing the brittle/tough transition obtained by the standard Izod technique was similar to that obtained using the non-essential work of fracture (β wp). The slight increase in toughness in the brittle zone of the impact strength curve when compared with either the rubber content or τ does not appear in the curve for the β wp. In the tough zone of the EWF curve, unlike that of the impact test, toughness increases of up to 30% and some change of morphology of the fracture surfaces were seen.