Enhancing toughness of poly(lactic acid) by regulating the hydroxyl value and viscosity of hydroxyl terminated polybutadiene

Ma, Zhirui; Zhang, Caili; Tang, Duo; Yang, Yang; Yang, Fan; Zhao, Min; Han, Yu; Weng, Yunxuan

doi:10.1002/app.52970

Cited by 2 publications

(3 citation statements)

References 34 publications

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“…However, the presence of the liquid rubbers also increased the cold crystallization temperature ( T cc ) and broadened the corresponding peak, indicating lower crystallization rate of PLA. This behavior confirmed the effectiveness of the interfacial adhesion between the blend components, as also suggested in other studies reported in the literature 20,23–25 . The interaction /reaction between the functional groups in both components restricts the PLA chain mobility and consequently the chain packaging.…”

Section: Resultssupporting

confidence: 89%

“…This behavior confirmed the effectiveness of the interfacial adhesion between the blend components, as also suggested in other studies reported in the literature. 20,[23][24][25] The interaction /reaction between the functional groups in both components restricts the PLA chain mobility and consequently the chain packaging.…”

Section: Thermal Propertiesmentioning

confidence: 99%

“…The toughness of PLA was also improved by blending with 10% of liquid polybutadiene 19 and 5% of liquid hydroxyl‐terminated polybutadiene (HTPB) 20 . The mechanical properties in the last case depended on the viscosity and amount of the OH groups in the HTPB.…”

Section: Introductionmentioning

confidence: 99%

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Functionalized liquid polyisoprene as a promising toughening agent for poly(lactic acid): Combining stiffness and toughness

Cordeiro,

Schmitz,

Soares

2023

J of Applied Polymer Sci

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Liquid polyisoprene rubbers (LIR) containing anhydride and carboxylic groups along their chains were successfully employed as toughening agent for poly(lactic acid) (PLA) without great influence on the stiffness of the matrix. In fact, the addition of 5% of these functionalized LIR resulted in an improvement of toughness and impact resistance of more than 2000%, whereas the reduction of the yield stress stayed in the range of 12%. No significant variation of the Young modulus was observed for the modified PLA samples. The effect of the LIR on the rheological and thermal properties of PLA was also investigated. The glass transition temperature obtained from dynamic‐mechanical analysis of the PLA matrix was not affected by the addition of 10% of the liquid rubber. The scanning electron microscopy analysis revealed a significant decrease in the rubber domains for the blends containing LIR functionalized with anhydride groups. Finally, the modified PLA with anhydride‐functionalized LIR was able to produce transparent film with outstanding mechanical performance than neat PLA, making this material a good option for food packaging.

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Section: Resultssupporting

confidence: 89%

Section: Thermal Propertiesmentioning

confidence: 99%