NDLI: Viscoelastic Properties of Epoxidized Natural Rubber/Poly(lactic acid) PLA/ENR Blends Containing Glycidyl-POSS and Trisilanolisooctyl-POSS as Functional Additives

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Viscoelastic Properties of Epoxidized Natural Rubber/Poly(lactic acid) PLA/ENR Blends Containing Glycidyl-POSS and Trisilanolisooctyl-POSS as Functional Additives

Content Provider	MDPI
Author	Magdalena, Lipińska Toczek, Klaudia Stefaniak, Magdalena
Copyright Year	2021
Description	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 $T_{g}$ 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 $E_{b}$ 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 $K_{C}$ indicating stronger deterioration of the mechanical properties that resulted from more intense degradation processes occurring during disposal in soil.
Starting Page	2686
e-ISSN	19961944
DOI	10.3390/ma14102686
Journal	Materials
Issue Number	10
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2021-05-20
Access Restriction	Open
Subject Keyword	Materials Polymer Science Thermoplastic Vulcanizates Poly(lactic Acid)/epoxidized Natural Rubber Blends Polyhedral Oligomeric Silsesquioxanes Poss Viscoelastic Properties
Content Type	Text
Resource Type	Article

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