Multiscale organization of thermoplastic elastomers with varying content of hard segments

Baeza, Guilhem P.; Sharma, Ashwinikumar; Louhichi, Ameur; Imperiali, Luna; Appel, Wilco P. J.; Fitié, Carel F. C.; Lettinga, M. P.; Ruymbeke, Evelyne Van; Vlassopoulos, Dimitris

doi:10.1016/j.polymer.2016.11.010

Cited by 24 publications

(80 citation statements)

References 50 publications

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“…Quantitative details on the chain structure and additional information on the synthesis can be found in supporting information, Section A.1, A.2 and Fig. S1 and in our previous study …”

Section: Methodsmentioning

confidence: 99%

“…Mass fraction of T4T crystallites: X c (%) = (Δ H DSC /Δ H T4T* )100 where Δ H T4T* = 150 J g −1 from reference .…”

Section: Methodsmentioning

confidence: 99%

“…Beyond the faster kinetics of aggregation provided by the hydrogen bonds, these low Δ T values suggest a pre‐existing order in the melt state probably coming from persistent interactions at high temperatures. In fact, while no phase separation or particular order was detected with classic polarized light microscopy, small angle X‐ray scattering resolved in time and temperature revealed unambiguously the presence of HS persistent aggregates at T > T m …”

Section: Introductionmentioning

confidence: 91%

“…either by directive hydrogen bonding or by van der Waals interactions with possible π–π stacking. While the former is responsible for the fast growth along a preferential direction, and thus for the elongated (ribbon‐like) nature of the aggregates, the latter allows the crystallites to widen perpendicularly (the thickness being fixed by the HS dimension, ca 2.1 nm) . Also, by showing quite broad endothermic peaks, conventional DSC suggested that these hot‐pressed materials were made of a wide molecular weight distribution of hard domains similarly to other TPEs based on polybutylene terephthalate (PBT) or polyamide 6,6 .…”

Section: Introductionmentioning

confidence: 99%

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Fast scanning calorimetry clarifies the understanding of the complex melting and crystallization behavior of polyesteramide multi‐block copolymers

Sharma

Baeza

Imperiali

et al. 2018

Polymer International

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Fast scanning calorimetry has been applied in order to understand the phase transitions in thermoplastic elastomers (TPEs) based on well‐defined multi‐block copolymers made of ‘soft’ polytetrahydrofuran and ‘hard’ terephthalate ester diamides. The intrinsically complex chemical structure of TPEs leads to complex phase transitions. By changing their thermal history over a wide range of temperature (from −100 °C to 200 °C) and cooling rates (from 10 to 4000 °C s−1), we clarify the origins of the various phases present in these materials. In particular, we study the different possibilities for the hard segments to associate depending on their mobility during the quenching phase, forming either strong and stable structures or weaker and metastable ones. Besides, we demonstrate that a minimal cooling rate of 800 °C s−1 is necessary to keep these TPEs (made of short and monodisperse hard segments) amorphous leading to a subsequent cold crystallization when heating back, at around 30 °C. Finally, we validate our interpretations by varying the copolymer composition (from 10 wt% to 20 wt% hard segments), revealing the thermal invariance of poorly organized domains. Based on these data, we also discuss the importance of chain diffusion in the crystallization process. Applying fast scanning calorimetry allows us to link fundamental understanding to industrial application. © 2018 Society of Chemical Industry

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“…Quantitative details on the chain structure and additional information on the synthesis can be found in supporting information, Section A.1, A.2 and Fig. S1 and in our previous study …”

Section: Methodsmentioning

confidence: 99%

“…Mass fraction of T4T crystallites: X c (%) = (Δ H DSC /Δ H T4T* )100 where Δ H T4T* = 150 J g −1 from reference .…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fast scanning calorimetry clarifies the understanding of the complex melting and crystallization behavior of polyesteramide multi‐block copolymers

Sharma

Baeza

Imperiali

et al. 2018

Polymer International

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“…[1][2][3] The versatility of their properties, which can vary from solid-like (for example, gels) to liquid-like, gives them a central role in several technological advances, including self-healing 4 and reinforced materials [5][6][7] , sensors 8,9 , cosmetics 10 , and drug delivery. 11,12 Despite the large body of literature on the dynamics of transient networks from associating polymers, tailoring the molecular features of polymers in order to achieve optimal properties, e.g.…”

Section: Introductionmentioning

confidence: 99%

Dendronized Polymers with Ureidopyrimidinone Groups: An Efficient Strategy To Tailor Intermolecular Interactions, Rheology, and Fracture

et al. 2017

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Recent advances on the structure–properties relationship of multiblock copolymers

Baeza

2021

Journal of Polymer Science

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Multiblock copolymers represent a fascinating class of materials that sits at the very heart of industrial applications and fundamental polymer science. They are most often made of a linear succession of incompatible “soft” and “hard” segments that microphase separate at room temperature while they can be easily re‐homogenized upon heating. This thermoreversible character provides them with decisive advantages with respect to other rubber‐based materials such as vulcanized elastomers, making them indispensable for the development of a more sustainable polymer industry. Beyond practical opportunities, tailoring the multiblock copolymers morphology has a pivotal role to play in the fundamental understanding of the structure–properties relationship of polymer‐based systems. It notably serves to comprehend complex materials such as semicrystalline homopolymers and nanocomposites. Aside from the thorough work developed on well‐defined diblock copolymers for half a century, this article review aims to guide the reader into the more intricate world of multiblock copolymers by providing him/her quantitative tools to connect chemical nature, microstructure and mechanical properties.

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Multiscale organization of thermoplastic elastomers with varying content of hard segments

Cited by 24 publications

References 50 publications

Fast scanning calorimetry clarifies the understanding of the complex melting and crystallization behavior of polyesteramide multi‐block copolymers

Fast scanning calorimetry clarifies the understanding of the complex melting and crystallization behavior of polyesteramide multi‐block copolymers

Dendronized Polymers with Ureidopyrimidinone Groups: An Efficient Strategy To Tailor Intermolecular Interactions, Rheology, and Fracture

Recent advances on the structure–properties relationship of multiblock copolymers

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