Characterization of pp/regenerated tire-rubber blends using proton spin-lattice relaxation time

被引：6

作者：

da Silva, Luciana P. ^{[1
]}

Luetkrneyer, Leandro ^{[1
]}

Furtado, Cristina R. G. ^{[2
]}

Bruno Tavares, Maria Ines ^{[2
]}

Pacheco, Elen B. A. V. ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Macromol Prof Elosia Mano, BR-21941 Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Inst Quim, Dept Proc Quim, BR-21941 Rio De Janeiro, Brazil

来源：

POLYMER TESTING | 2009年 / 28卷 / 01期

关键词：

PP; Rubber; NMR; Proton spin-lattice relaxation time;

D O I：

10.1016/j.polymertesting.2008.10.002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Proton spin-lattice relaxation time (T1H) in the solid state was used to determine the molecular mobility of PP/regenerated tire-rubber blends (PP/RgR), employing low-field NMR. The blends were prepared with different quantities of regenerated rubber (5,10,15 and 20 wt%). The addition of 5 wt% maleic anhydride functionalized polypropylene (PP-g-MAH) was carried out to evaluate the processing behavior of the reclaimed material. Important differences were observed concerning the molecular mobility according to the content of regenerated rubber. A decrease in the relaxation time of the blends with an increase in PP-g-MAH content indicates that enhanced mobility of PP/regenerated tire-rubber blends was obtained and, thus, PP-g-MAH acts as a plasticizer and/or impact modified. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：53 / 56

页数：4

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