LIonomers-New Generation of Ionomer: Understanding of Their Interaction and Structuration as a Function of the Tunability of Cation and Anion

Hou, Liutong; Livi, Sébastien; Gérard, Jean‐François; Duchet‐Rumeau, Jannick

doi:10.3390/polym15020370

Cited by 3 publications

(15 citation statements)

References 45 publications

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“…The other cations are more sterically hindered which leads to decrease the interactions with carboxylate groups. Meanwhile, all these changes indicate that the generated ionic interactions can stand the temperature up to 180 C. The rheological behavior of LIonomers tends toward more gel-like behavior compared to the neat polymer due to (i) the ionic interactions generated between PhILs and polymer chains acting as crosslinkings restraining segmental motions 29,43 ; (ii) the gel-like structure induced by introducing PhILs 21,44 ; (iii) the presence of ionic domains within LIonomers (Figure 5). 1,10,[40][41][42]45 On the other hand, the increase of MA content in the matrix causes a decrease of the viscosity (L-P + DEP-10 > LB1-P + DEP-10).…”

Section: Effect Of Phils On Rheological Properties: Interaction Strengthmentioning

confidence: 99%

“…Considering the expected morphologies of LIonomers, these granular "bean-spots" features could be attributed to a phase-separation and the association of ILs. 29 Nevertheless, the state of the ionic liquid in the final LIonomers results from the equilibrium of its interactions between the carboxylates of the grafted-PP matrix and IL pairs. The size of the IL-rich phase is dependent on the host matrix.…”

Section: Microstructure Characterization: Location Of Philsmentioning

confidence: 99%

“…On the other side, the increased T α 0 , associated with RAF large amplitude motions, of the LIonomers compared to the one of the neat PP polymer confirms the location of the PhILs close to crystalline lamellae. 29 In fact, the alkyl chains of the phosphonium cation may promote the miscibility with PPgMA. This effect is particularly pronounced for the LIonomer processed with 10 wt % P + DEP that displays the strongest COO À /phosphate ionic interactions.…”

Section: Microstructure Characterization: Location Of Philsmentioning

confidence: 99%

“…The obtained physical behaviors of LIonomers could be tailored from the management of interactions intensity within ILs/thermoplastic polymer blends from various ionic pairs of ionic liquids. 29 In this paper, new ionic crosslink has been obtained due to the basicity and nucleophilicity of the counter anions as well as the original electrostatic interactions of ILs cation/anion pair. Imidazolium ILs acting together achieve an outstanding equilibrium between stiffness and stretchiness of the resulting LIonomers.…”

Section: Introductionmentioning

confidence: 99%

“…31 Four phosphonium based cations combined with different anions, chloride vs. acetate vs. phosphinate vs. phosphate anions have been considered (Table 1). In addition to the parameters controlling the location and rearrangement of PhILs in the bulk of the polymer matrix or defining the nanostructuration and their consequence of LIonomers considered in the literature, 29 the objectives of this paper are (i) analyze the strength of ionic interactions between polymer polar groups and PhILs in relation with steric hindrance due to the conformation of PhILs; (ii) assess how these PhILs affect the viscoelastic and thermal-mechanical behaviors as well as the crystallization processes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of phosphonium‐based ionic liquids on the structuration and physical properties of LIonomers

Hou,

Gérard,

Livi

et al. 2023

J of Applied Polymer Sci

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In this study, LIonomers families based on phosphonium ILs have been successfully developed. These LIonomers are designed from the combination of various phosphonium‐based ionic liquids (PhILs) with different counter anions including tetradecyl (trihexyl) phosphonium bis (2,4,4‐trimethylpentyl) phosphinate (P+TMP), tributyl (ethyl) phosphonium diethyl phosphate (P+DEP), trihexyl (tetradecyl) phosphonium chloride (P+Cl) and trihexyl (tetradecyl) phosphonium acetate (P+Ac). Here, the interactions between maleic anhydride groups (MA) of the maleic anhydride‐grafted polypropylene (PPgMA) and PhILs within LIonomers have been investigated by NMR, whose intensity depends on the chemical nature of cation/anion pairs. Then, viscosity in the molten state was considered as a probe of the interaction intensity between polar groups of grafted polypropylenes and the phosphonium cation. The proper one can be tuned from the nature (P+TMP vs. P+Ac vs. P+Cl), from the steric hindrance, that is, relevant to the conformation of PhILs (P+DEP vs. P+TMP / P+Ac / P+Cl), and by MA content, as well as the extent of generated ionic chains from polar groups of matrices as “head” and associated anion/cation pairs. The effect of these generated ionic interactions on crystallization process and mechanical properties had been also investigated by DSC in non‐isothermal conditions, and tensile tests. Depending of the steric hindrance of the phosphonium ILs playing a key role on the interactions with PPgMA chains, an increase of the ductility versus a plasticizing effect can be obtained as function of the targeted applications.

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