Studies on Non-Isothermal Crystallisation and Viscoelastic Properties of Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and Epoxidized Natural Rubber Blends

2017 ◽  
Vol 371 (1) ◽  
pp. 107-113
Author(s):  
Faridah M.M. Akram ◽  
Chin Han Chan ◽  
Yoga Sugama Salim ◽  
Seng Neon Gan ◽  
K. Sudesh Kumar
Keyword(s):  
Natural Rubber ◽  
Viscoelastic Properties ◽  
Epoxidized Natural Rubber ◽  
Rubber Blends ◽  
Isothermal Crystallisation

scholarly journals Viscoelastic Properties of Epoxidized Natural Rubber/Poly(Lactic Acid) PLA/ENR Blends Containing Glycidyl-POSS and Trisilanolisooctyl-POSS as Functional Additives

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2686
Author(s):  
Magdalena Lipińska ◽  
Klaudia Toczek ◽  
Magdalena Stefaniak
Keyword(s):  
Lactic Acid ◽  
Natural Rubber ◽  
Viscoelastic Properties ◽  
Complex Viscosity ◽  
Epoxidized Natural Rubber ◽  
Poly Lactic Acid ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Rubber Blends ◽  
Functional Additives ◽  
Cross Links

The glycidyl-POSS (Polyhedral Oligomeric Silsesquioxanes, Polysilsesquioxane, POSS) (Gly-POSS) and trisilanolisooctyl-POSS (HO-POSS) were applied as functional additives influencing on the viscoelastic properties of the dynamic vulcanized PLA/ENR (poly(lactic acid)/epoxidized natural rubber) blends. The plasticizing effect of HO-POSS on PLA/ENR melt, leading to the decrease of complex viscosity at 160 °C, was observed. After the incorporation of Gly-POSS into PLA/ENR blends the complex viscosity increased confirming that the epoxy groups of Gly-POSS were able to react with the functional groups of ENR and the groups present at the end of PLA chains. The incorporation of Gly-POSS into 40:60 PLA/ENR blend provided significant enhancement of the storage shear modulus G’ at 30 °C. Furthermore, the glass transition temperatures Tg of ENR phase for PLA/ENR/Gly-POSS blends were shifted to higher values of temperature as compared with blends modified by HO-POSS. Strong reduction of the elongation at break Eb for 40:60 PLA/ENR/Gly-POSS blend indicated that Gly-POSS particles acted as multifunctional cross-links reducing elasticity of the material. The modification of 40:60 PLA/ENR blend by HO-POSS molecules led to lower values of composting coefficient KC indicating stronger deterioration of the mechanical properties that resulted from more intense degradation processes occurring during disposal in soil.

Natural rubber blends with epoxidized natural rubber

1997 ◽  
Vol 36 (5) ◽  
pp. 579-594 ◽  
Author(s):  
Sang Yup Lee ◽  
Joon Hyung Kim ◽  
Byung Kyu Kim
Keyword(s):  
Natural Rubber ◽  
Epoxidized Natural Rubber ◽  
Rubber Blends
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