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Mechanical properties of short‐isora‐fiber‐reinforced natural rubber composites: Effects of fiber length, orientation, and loading; alkali treatment; and bonding agent
Author(s) -
Mathew Lovely,
Joseph Rani
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25065
Subject(s) - composite material , materials science , ultimate tensile strength , vulcanization , fiber , natural rubber , scanning electron microscope , modulus , natural fiber , tear resistance
A series of short‐isora‐fiber‐reinforced natural rubber composites were prepared by the incorporation of fibers of different lengths (6, 10, and 14 mm) at 15 phr loading and at different concentrations (10, 20, 30, and 40 phr) with a 10 mm fiber length. Mixes were also prepared with 10 mm long fibers treated with a 5% NaOH solution. The vulcanization parameters, processability, and stress–strain properties of these composites were analyzed. Properties such as tensile strength, tear strength, and tensile modulus were found to be at maximum for composites containing longitudinally oriented fibers 10 mm in length. Mixes containing fiber loadings of 30 phr with bonding agent (resorcinol‐formaldehyde [RF] resin) showed mechanical properties superior to all other composites. Scanning electron microscopy (SEM) studies were carried out to investigate the fiber surface morphology, fiber pullout, and fiber–rubber interface. SEM studies showed that the bonding between the fiber and rubber was improved with treated fibers and with the use of bonding agent. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1640–1650, 2007

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