The Investigation of the Toughening Mechanism of PHBV/PBAT with a Novel Hyperbranched Ethylenediamine Triazine Polymer Based Modifier: The Formation of the Transition Layer and the Microcrosslinking Structure

Journal Article · Mon Oct 15 04:00:00 EDT 2018 · Journal of Polymers and the Environment

DOI:https://doi.org/10.1007/S10924-018-1286-4· OSTI ID:22787941

Jin, Yujuan; Wang, Ee; Weng, Yunxuan ^[1]; Men, Shuang ^[2]; Dong, Yuping ^[3]; Sima, Yangyang; Huang, Zhigang ^[1]

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1. Beijing Technology and Business University, School of Materials and Mechanical Engineering (China)
2. Shenyang Ligong University, School of Material Science and Engineering (China)
3. Beijing Institute of Technology, School of Material Science and Engineering (China)

A new type of designed hyperbranched ethylenediamine trazine polymer (HBETP) is successfully synthesized and characterized based upon NMR and GPC. The prepared HBETP is used to modify the poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV)/poly(butylene adipate-co-terephthalate) (PBAT) blends. The effect of HBETP on the microstructure, mechanical properties and thermal properties of the blends is studied. The results indicate that upon addition of 1.0 wt% of HBETP, the impact strength of the PHBV/PBAT blends is increased by 47.1%; ∆T{sub g} of the blends decreases from 53.2 to 49.9 °C. These results, together with the morphology analysis of the fractured surface of the blends, conclude the formation of the transition layer between PHBV and PBAT. Also, the XRD result shows that the addition of HBETP can limit the growth of the PHBV crystals and causes the decrease of both the crystallinity and the grain crystalline size. The DSC result demonstrates that the addition of HBETP mainly affects the crystallization of the HB-HV binary eutectic region within PHBV. The mechanism of PHBV/PBAT toughening is due to the formation of the strong physical hydrogen bonding and the chemical micro-crosslinking between HBETP and PHBV/PBAT, which is proposed based on XPS characterization.

• OSTI ID: 22787941
• Journal Information: Journal of Polymers and the Environment, Journal Name: Journal of Polymers and the Environment Journal Issue: 10 Vol. 26; ISSN 1566-2543
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CALORIMETRY
CROSS-LINKING
CRYSTALLIZATION
CRYSTALS
IMPACT STRENGTH
LAYERS
MICROSTRUCTURE
MORPHOLOGY
NUCLEAR MAGNETIC RESONANCE
POLYMERS
SURFACES
THERMODYNAMIC PROPERTIES
TRIAZINES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY