Effect of cross-linking on adhesion property of benzoyl-peroxide-cured epoxidized natural rubber (ENR 50) adhesives

2012 ◽  
Vol 46 (2) ◽  
pp. 187-198 ◽  
Author(s):  
Beng Teik Poh ◽  
Chun Hsiung Lim
Keyword(s):  
Natural Rubber ◽  
Benzoyl Peroxide ◽  
Adhesion Property ◽  
Epoxidized Natural Rubber ◽  
Cross Linking

Improving Mechanical Properties of Poly-β-Hydroxybutyrate-co-β-Hydroxyvalerate by Blending with Natural Rubber and Epoxidized Natural Rubber

2014 ◽  
Vol 983 ◽  
pp. 179-182 ◽  
Author(s):  
Maneewong Chutamas ◽  
Sunthornvarabhas Jackapon ◽  
Joong Kim Hyun ◽  
Sriroth Klanarong
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Maleic Anhydride ◽  
Impact Strength ◽  
Natural Rubber ◽  
Benzoyl Peroxide ◽  
Storage Modulus ◽  
Epoxidized Natural Rubber ◽  
Mixed Coding ◽  
Elastic Polymer

Poly-β-hydroxybutyrate-co-β-hydroxyvalerate (PHBV) is a bacterial-synthesized biopolymer. Moreover, PHBV is a biodegradable, it is an interesting biopolymer for disposable products. PHBV is difficult to process due to its low toughness, an elastic polymer such as natural rubber is introduced to develop toughness. In this experiment, PHBV mechanical properties were improved by blending with natural rubber (NR) and epoxidized natural rubber (ENR). The NR/PHBV and ENR/PHBV blends with the same ratio of 10/90 (wt/wt) could be extruded, whereas other conditions could not. This ratio was then used throughout this study to examine effect of maleic anhydride (MA) and benzoyl peroxide (BPO) to improve toughness of the blends. Result showed at composition where 1.0 % (wt/wt) MA and 0.05 % (wt/wt) BPO was mixed (coding EPMB2), several aspects of mechanical properties were improved. The blend, EPMB2 revealed the highest impact strength, significantly improved of elongation but drastically decreased of tensile strength. Storage modulus slightly decreased, tangent delta significantly increased when compared with neat PHBV.

scholarly journals Cure efficiency of dodecyl succinic anhydride as a cross-linking agent for elastomer blends based on epoxidized natural rubber

2014 ◽  
Vol 132 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
Leno Mascia ◽  
Jane Clarke ◽  
Kiat Seong Ng ◽  
Kok Sien Chua ◽  
Pietro Russo
Keyword(s):  
Natural Rubber ◽  
Succinic Anhydride ◽  
Epoxidized Natural Rubber ◽  
Cross Linking

PROBING THE POSTGELATION REACTIONS OF EPOXIDIZED NATURAL RUBBER CROSS-LINKED WITH DODECENYL SUCCINIC ANHYDRIDE

2015 ◽  
Vol 88 (4) ◽  
pp. 560-573 ◽  
Author(s):  
Leno Mascia ◽  
Pietro Russo ◽  
Letizia Verdolotti ◽  
Jane Clarke ◽  
Marino Lavorgna ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Succinic Anhydride ◽  
Near Infrared ◽  
Epoxy Group ◽  
Attenuated Total Reflection ◽  
Epoxidized Natural Rubber ◽  
Cross Linking ◽  
Heat Of Reaction ◽  
Scanning Calorimetry ◽  
Oh Groups

ABSTRACT Pregelled mixes of an epoxidized natural rubber, known as ENR50, containing dodecenyl succinic anhydride (DDSA) as cross-linking agent and dimethyl benzyl amine (DMBA) as catalyst, were cured isothermally at 160 °C, and the progress of the reactions was followed by both thermal analysis (differential scanning calorimetry and thermogravimetric analysis [TGA]) and infrared spectroscopy (Fourier transform near-infrared and attenuated total reflection). The curing reactions were found to be approximately first order for both heat of reaction associated with cross-linking and the disappearance of the epoxy groups, even though the reduction of epoxy group concentration was found to be substantially greater than the amount expected from reactions with the anhydride, because of the formation of large quantities of vicinal OH groups. The TGA data have indicated that the pregelled mixes undergo more extensive anaerobic degradation at higher temperatures than the un–cross-linked elastomer, which is accelerated by the presence of the DMBA catalyst.

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