Mechanical and flame‐retardant properties of biodegradable polylactide composites with hyperbranched silicon‐containing polymer

A hyperbranched polymer (HBP‐B2) containing siloxane chains was synthesized via bulk polymerization of diepoxide with a primary amine in the presence of monoepoxide. The weight‐average molecular weight of the prepared polymers was approximately 9200. Composites of polylactide (PLA) with aluminum tri...

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Bibliographic Details
Published in:Polymers for advanced technologies 2018-09, Vol.29 (9), p.2529-2536
Main Authors: Cheng, Kuo‐Chung, Wang, Chun‐Chieh, Ruan, Jia‐lung, Wu, Cheng‐Han, Li, Chong‐Wei
Format: Article
Language:English
Subjects:
Aluminum
Biodegradability
Bulk polymerization
Chemical synthesis
Direct melting
Elongation
flame retardant
hyperbranched polymer
Impact strength
Infrared cameras
polylactide
Polymer matrix composites
Polymers
siloxane
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Summary:A hyperbranched polymer (HBP‐B2) containing siloxane chains was synthesized via bulk polymerization of diepoxide with a primary amine in the presence of monoepoxide. The weight‐average molecular weight of the prepared polymers was approximately 9200. Composites of polylactide (PLA) with aluminum trihydroxide (ATH) and the HBP‐B2 were prepared via direct melt compounding using a brabender. The test results showed that the LOI could be raised to 34% for the PLA composite with 25 wt% ATH and 5% HBP‐B2. The surface thermal profile of the composite during UL94 V test was further captured by an infrared camera, which was helpful to understand the flame‐retardant properties of the different samples. A V‐0 rating could be achieved by adding ATH and HBP‐B2 to the PLA matrix. Incorporation of HBP‐B2 as a plasticizer could increase the impact strength of a PLA blend or composite. For example, an addition of 10 wt% of HBP and 20 wt% ATH increased the elongation at break from 5% for neat PLA to 155% for the PLA composite.
ISSN:1042-7147
1099-1581
DOI:10.1002/pat.4364