Accelerated nonisothermal crystallization and improved material properties of biobased poly(butylene 2,5-furandicarboxylate)/talc composites

Shao, Qi; Long, Liwen; Zhao, Jianguo; Li, Yiguo; Wang, Zongbao

doi:10.1016/j.tca.2023.179618

Cited by 1 publication

(5 citation statements)

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“…Moreover, a comparison of the aforementioned time parameters for the three systems with NA clearly reveals that the nucleation efficiency first enlarges with rising NA loading from 0.5 to 1.0 wt % but then decreases with further adding NA to 2.0 wt %. This tendency is consistent with the dispersion features of talc platelets in the PBF matrix, highlighting only well-dispersed NA platelets that can afford effective nucleation sites for inducing PBF crystallization.…”

Section: Resultssupporting

confidence: 82%

“…The shortest t 1/2 of PBF filled with different kinds of MMT but the same content of 1.0 wt % declines ∼58% from ∼6.0 min of PBF to ∼2.5 min for PBF/MMT10A at 130 °C, while the corresponding decrement at the same T c for PBF/T1.0 exceeds 75% from 3.7 min of pure PBF to 0.9 min (Table ). It is therefore believed that among the three investigated fillers here, we selected layered talc that possesses the best nucleating efficiency for accelerating the isothermal crystallization of PBF, in agreement with the conclusion obtained from nonisothermal crystallization …”

Section: Resultssupporting

confidence: 79%

“…It is therefore believed that among the three investigated fillers here, we selected layered talc that possesses the best nucleating efficiency for accelerating the isothermal crystallization of PBF, in agreement with the conclusion obtained from nonisothermal crystallization. 48 Specific Evidence of Multiscale Crystalline Structures. To gain insights into the primary nucleation mechanism, the simultaneous in situ WAXD/SAXS technique is employed to follow the formation and evolution of multiscale crystalline structures.…”

Section: Expedited Isothermal Crystallizationmentioning

confidence: 99%

“…Two-dimensional inorganic fillers showing stably flat crystalline surfaces offer an idea medium for studying epitaxial crystallization of the polymers with high crystallization temperatures. − Layered talc is a well-known NA of several polymers, and the epitaxial relationships on its (001) basal plane of polyethylene (PE), polypropylene (PP), poly(ethylene terephthalate) (PET), and poly(lactic acid) (PLA) have been elucidated. In addition, the favorable local affinity in PBF/talc interface has been approved . Conclusively, there is a preferable periodicity leeway of about 7% between a PBF interchain =C–H···O=C bonding distance of 5.66 Å and talc lattice parameter a = 5.27 Å .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the favorable local affinity in PBF/talc interface has been approved. 48 Conclusively, there is a preferable periodicity leeway of about 7% between a PBF interchain =C−H•••O=C bonding distance of 5.66 Å and talc lattice parameter a = 5.27 Å. 49 We therefore predict that talc should be an efficient NA to expedite the crystallization of PBF via directional epitaxy intensifying the =C−H•••O=C bonding direction.…”

Section: ■ Introductionmentioning

confidence: 99%

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Directional Epitaxy Intensifying Intermolecular =C–H···O=C Hydrogen Bonding to Expedite Bulk Crystallization of Biobased Poly(butylene 2,5-furandicarboxylate)

Shao,

Long,

Zhao

et al. 2024

Macromolecules

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Intermolecular =C–H···O=C hydrogen bonding plays a vital role in stabilizing the high-energy crystal conformation of poly(butylene 2,5-furandicarboxylate) (PBF), which endows a strong structural element to control its crystallization. Here, by evaluating interfacial affinity and lattice matching, a layered nucleating agent (NA) is employed for triggering the directional epitaxy via intensifying =C–H···O=C interaction to promote bulk crystallization of PBF. The expedited isothermal crystallization kinetics are analyzed by the Avrami model and proven by a sharp decline of the crystallization halt-time. The crystals induced by the layered NA not only show the enlarged crystallite size along the direction perpendicular to the (010) plane but display the preferred (010) diffraction at the beginning coupled with the compact crystallographic b-axis. Moreover, two kinds of periodic structures are produced, and the first evolved one reflects the increased long period and crystalline layer thickness. Conclusively, the intensified =C–H···O=C bonding in the NA-induced crystals is well convinced by the greater red-shifts of stretching vibrations of both =C–H and C=O after crystallization in accordance with its shrunken b-axis. Finally, a precisely epitaxial relationship between the crystal lattices of PBF and NA is proposed as the primary nucleation mechanism. This work provides an excellent example of designing effective NA inducing the directional epitaxy via intensifying the unique =C–H···O=C interaction to enhance bulk crystallization of furan-aromatic polyesters with solid multiscale structure evidence to uncover the intrinsic molecular mechanism.

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Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 79%

Section: Expedited Isothermal Crystallizationmentioning

confidence: 99%