PP/EPDM-Blends by Dynamic Vulcanization: Influence of increasing peroxide concentration on mechanical, morphological and rheological characteristics

被引：6

作者：

Patermann, S. ^{[1
]}

Altstaedt, V. ^{[1
]}

机构：

[1] Univ Bayreuth, Dept Polymer Engn, D-95447 Bayreuth, Germany

来源：

PROCEEDINGS OF PPS-29: THE 29TH INTERNATIONAL CONFERENCE OF THE POLYMER - CONFERENCE PAPERS | 2014年 / 1593卷

关键词：

thermoplastic vulcanizate; dynamic vulcanization; PP/EPDM blends; peroxide; crosslinking;

D O I：

10.1063/1.4873834

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thermoplastic vulcanizates (TPVs) combine the elastic properties of thermoset cross-linked rubbers with the melt processability of thermoplastics. The most representative examples of this class are the TPVs based on polypropylene (PP) and ethylene-propylene-diene terpolymer rubber (EPDM). The PP/EPDM blends were produced by dynamic vulcanization in a continuous extrusion process. The influence of different peroxide concentrations was studied with regard to cross-link density, compression set, tensile strength/elongation at break and morphology. With increasing peroxide concentration, the cross-link density increases, leading to a reduction of the compression set by 50 %. The cross-linked blends show smaller dispersed EPDM particles than the uncured one. With a peroxide concentration between 0.2 and 0.6 % a maximum in tensile strength and elongation at break was found and with increasing peroxide concentration, the complex viscosity of the TPVs decreases. Compared to batch processes, the results show nearly the same trends.

引用

页码：516 / 519

页数：4