Environmental stress-cracking resistance of LDPE/EVA blends

被引：31

作者：

Borisova, B ^{[1
]}

Kressler, J ^{[1
]}

机构：

[1] Univ Halle Wittenberg, Fac Ingn Wissensch, D-06099 Halle Saale, Germany

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2003年 / 288卷 / 06期

关键词：

blends; environmental stress-cracking resistance (ESCR); ethylene-vinyl acetate copolymers; low-density polyethylene (LDPE);

D O I：

10.1002/mame.200390048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Blends of low-density polyethylene with random copolymers of ethylene and vinyl acetate (PE/EVA) are studied with respect to their environmental stress-cracking resistance (ESCR) using the Bell-telephone test. This system shows the shortest time to failure in the ESCR test after annealing at 50degreesC in a stress-cracking agent (Igepal solution) compared with that in the tests conducted at 30 and 70degreesC. The increase of the time to failure at 70degreesC as compared with that at 50degreesC is probably the result of the semicrystalline proportion of EVA melting. Transmission electron microscopy images (see Figure) reveal that EVA particles are molten and deformed in bending direction of the sample at 70degreesC in contrast to samples annealed at 50 and 30degreesC. TEM pictures of a failed sample during the test conducted at 50degreesC indicate that EVA particles can stop crack propagation.

引用

页码：509 / 515

页数：7

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