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• W2769289520 abstract "Abstract In this study, we address heat-seal properties of poly (lactic acid) (PLA), blended with Poly (butylene adipate-co-terephthalate) (PBAT). The objective is to correlate blends crystalline structure and morphology to corresponding heat-seal of blends films. The SEM micrographs show a two-phase elongated morphology where stretched ellipsoids developed through elongational flow during the cast film process. To distinguish the effect of crystallization, we also prepared amorphous and crystalline PBAT films and then compared them to blends with PLA. Heat-sealed areas were created by putting film surfaces in intimate contact for 1 s at the pressure of 0.5 N/mm 2 or Pa and in the temperature range of 70 to 140 °C. Thermal analysis shows that the crystalline structure of PBAT has a significant effect on shifting its heat-seal initiation temperature (T si ) up to 20 °C. Regarding the blends, incorporation of PBAT as a dispersed phase lowers T si of blend samples. Here, gradual decrease in PBAT crystallinity caused by the hindering effect of PLA rigid molecules correlates with the shift in heat-seal initiation temperature. As mentioned above, elongated disperse morphology with higher aspect ratio of the dispersed phase compared to spherical dispersed domain, is formed through film cast process. This enhances the adhesion process by providing higher contact area. The blends also show higher toughness and better puncture resistance, which is an asset for flexible packaging applications and would enhance the mechanical performance of the seal layer." @default.
• W2769289520 created "2017-12-04" @default.
• W2769289520 creator A5018898944 @default.
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• W2769289520 date "2017-11-17" @default.
• W2769289520 modified "2023-10-13" @default.
• W2769289520 title "Tailoring Heat-Seal Properties of Biodegradable Polymers through Melt Blending" @default.
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• W2769289520 doi "https://doi.org/10.3139/217.3484" @default.
• W2769289520 hasPublicationYear "2017" @default.
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