ELASTICITY OF HARD ELASTIC POLYPROPYLENE FIBRE AND SURFACE ENERGY*

YU Tongyin; DU Qianguo; HU Jiacong

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ELASTICITY OF HARD ELASTIC POLYPROPYLENE FIBRE AND SURFACE ENERGY*

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- ELASTICITY OF HARD ELASTIC POLYPROPYLENE FIBRE AND SURFACE ENERGY*
- Vol. 3, Issue 1, Pages: 35-41(1985)
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- Published：20 March 1985
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YU Tongyin, DU Qianguo, HU Jiacong. ELASTICITY OF HARD ELASTIC POLYPROPYLENE FIBRE AND SURFACE ENERGY*[J]. 1985, 3(1): 35-41.
DOI：

YU Tongyin, DU Qianguo, HU Jiacong. ELASTICITY OF HARD ELASTIC POLYPROPYLENE FIBRE AND SURFACE ENERGY*[J]. 1985, 3(1): 35-41. DOI：

摘要

In the stress relaxation process of HEPP (Hard Elastic Polypropylene) fibre

the added liquids

e. g. ethanol and n-hexane

which can wet polypropylene

cause an abrupt decrease of stress. By measuring the contact angles and decreases of stress and evaluating according to Young-Dupre's equation

it was found that about one-third of the initial stress is associated with the sur-face energy. When soaked in liquids mentioned above

HEPP fibre almost lost its elasticity. It isnot the result of plasticizing or 'solvent cracking'but most likely comes from the changes of the surface energy.

Abstract

In the stress relaxation process of HEPP (Hard Elastic Polypropylene) fibre

the added liquids

e. g. ethanol and n-hexane

which can wet polypropylene

cause an abrupt decrease of stress. By measuring the contact angles and decreases of stress and evaluating according to Young-Dupre's equation

it was found that about one-third of the initial stress is associated with the sur-face energy. When soaked in liquids mentioned above

HEPP fibre almost lost its elasticity. It isnot the result of plasticizing or 'solvent cracking'but most likely comes from the changes of the surface energy.

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