Diffusion and permeability of aldehydes into blends of natural rubber and chemically modified low molecular weight natural rubber

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Title: Diffusion and permeability of aldehydes into blends of natural rubber and chemically modified low molecular weight natural rubber
Creator: Akinlabi, A.K.
Creator: Aigbodion, A.I.
Creator: Okieimen, F.E.
Contributor: ZAWATI|ZAWATI
Subject: Document Delivery
Date: 20090701 | 20090701 | | 2005 | | | | | | |
Description: Low molecular weight natural rubber (LMWNR) obtained from natural rubber (NR) by depolymerization of natural rubber latex (NRL) was modified by epoxidation to 35% epoxide level to yield epoxidized low molecular weight natural + rubber (ELMWNR). The ELMWNR was in turn modified in a solution of thioglycollic acid (TGA) (0.5 mol phr) to yield a product of 20% conversion of its initial LMWNR epoxide. Blends of NR with LMWNR, ELMWNR and epoxidized low molecular weight natural rubber+ thioglycollic acid (ELWMNR-TGA) adduct were made. The mixes were vulcanized at 150°C for 20 min before determining the system parameters (n and k), the sorption (S), diffusion (D) and permeability (P) of the vulcanizates in acetaldehyde and formaldehyde+ solutions at three different temperatures (25, 40 and 60°C) for a period of 90 days. The sorption, diffusion and permeability of the vulcanizates were found to be temperature dependent. The vulcanizates containing ELMWNR were found not to be easily + penetrated by both acetaldehyde and formaldehyde when compared with base mix A that is vulcanizates with only NR. The reaction system was found not to be spontaneous but dependent on the activation energies.

Identifier: vital1:31850
Format: application/pdf
Relation: Polym. Adv. Technol. 2005 16 p. 318-322
Relation: Polym Adv Technol (2005) 16:318-322
Rights: No|No
Type: Article

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Akinlabi, A.K., Aigbodion, A.I., Okieimen, F.E.. Diffusion and permeability of aldehydes into blends of natural rubber and chemically modified low molecular weight natural rubber. 20090701 | 20090701 | | 2005 | | | | | | |.

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