Toughening Poly(lactic acid) with Imidazolium-based Elastomeric Ionomers

Chen, Lu; Hu, Keqiang; Sun, Siting; Jiang, Hai; Dong, Hongjuan; Zhang, Kunyu; Pan, Li; Li, Yuesheng

doi:10.1007/s10118-018-2143-6

Cited by 26 publications

(32 citation statements)

References 45 publications

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“…However, to the best of our knowledge, there are rare reports on blends prepared from PLA/elastomeric ionomers, especially those using organic cation-functionalized elastomeric ionomers. Recently, we found that imidazolium-based elastomeric ionomers prepared from brominated poly(isobutylene- co -isoprene) (BIIR) with different length alkyl chains could efficiently improve the tensile flexibility of PLA . However, to our disappointment, these imidazolium-based elastomeric ionomers ( i -BIIRs) exhibited a very poor ability to enhance the impact toughness of PLA, which is the main challenge for PLA applications.…”

Section: Introductionmentioning

confidence: 98%

“…For the commercially available metal cation ionomers, the limited variable molecular diversity and functional multiplicity are major shortcomings for their widespread applications in polymer blending. We recently developed a series of interesting imidazolium-based polymerized ionic liquids (PILs) with attractive properties by using tunable organic cation structures. − The diverse designability of the organic imidazolium group endows the imidazolium-based PILs with a unique self-healing performance and balanced stiffness–toughness properties. − The excellent physical performance of these PILs also inspired us to introduce the organic imidazolium group into commercial polymers such as polyolefin and elastomers to develop novel ionomers as effective modifying agents for polymer blends. , …”

Section: Introductionmentioning

confidence: 99%

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Functionalized Elastomeric Ionomers Used as Effective Toughening Agents for Poly(lactic acid): Enhancement in Interfacial Adhesion and Mechanical Performance

Dong

Ding

Jiang

et al. 2019

ACS Sustainable Chem. Eng.

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A series of elastomeric ionomers functionalized with different imidazolium-based cations were synthesized by a facile and efficient quaternization reaction from commercial bromobutyl rubber (BIIR) and different functionalized imidazoles, including 1-ethylimidazole, N-(2-hydroxyethyl)imidazole, newly designed 1-(11′-hydroxyundecyl)imidazole, and N-[3-(1H-imidazol-1-yl)propyl]-hexanamide. These BIIR-based elastomeric ionomers (i-BIIRs) with a balanced mechanical performance, interfacial polar interactions, and a suitable processability were employed as novel modifying agents for poly(lactic acid) (PLA) to achieve highly toughened sustainable blends. The influence of the cationic structure of these ionomers and blend ratio on the compatibility and mechanical performance of the blends was thoroughly investigated. The introduction of polar hydroxyl groups with varied alkyl lengths or an amide group into the imidazolium cation of the i-BIIRs markedly improved the compatibility and impact toughness of the PLA/i-BIIR blends, relative to those of the pure BIIR and the i-BIIR ionomers without functional polar groups. These PLA/i-BIIR ionomer blends exhibited an excellent flexibility–stiffness balance, in which the highest elongation at break up to 300% was achieved with a small loss in stiffness. An impressively high impact strength of 17.1 kJ/m2 was achieved for the PLA and i-BIIR-11-OH (80/20) blends, and this impact strength is almost 6 times that of the neat PLA. The interfacial adhesion between the evenly dispersed small ionomer and PLA matrix was improved because the synergistic multiple intermolecular interaction is the native mechanism for enhancing the toughness and flexibility of the blends.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Functionalized Elastomeric Ionomers Used as Effective Toughening Agents for Poly(lactic acid): Enhancement in Interfacial Adhesion and Mechanical Performance

Dong

Ding

Jiang

et al. 2019

ACS Sustainable Chem. Eng.

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“…6−12 Blending PLA with ductile polymers to obtain highly toughened PLA-based materials is a very facile method with the advantages of cost-effectiveness and easy large-scale production. 13−15 P 3,4 HB is a new commercially available member of the PHA family synthesized by microorganisms from renewable resources. Compared to other commercial PHAs, the P 3,4 HB polymer has a lower degree of crystallinity and lower melting temperature but better flexibility owing to the introduction of 4-hydroxybutyrate (4HB) comonomer unit in the main chain.…”

Section: Introductionmentioning

confidence: 99%

Toughening Biosourced Poly(lactic acid) and Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) Blends by a Renewable Poly(epichlorohydrin-co-ethylene oxide) Elastomer

Dong

Jiang

et al. 2019

ACS Omega

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A series of sustainable polymer blends from renewable poly(lactic acid) (PLA), poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3,4HB), and poly(epichlorohydrin-co-ethylene oxide) (ECO) elastomer were fabricated via a melt blending method to gain balanced physical performance. The interplay of the composition, mutual miscibility, and viscosity ratio of the pristine PLA, P3,4HB, and ECO elastomer resulted in diverse phase structures of the ternary blends. An excellent flexibility at an elongation of 270% was achieved for the PLA/P3,4HB/ECO (70/20/10) blend with a core–shell structure. The PLA/P3,4HB/ECO (70/10/20) blend with a phase-separated structure exhibited a high impact strength of 54 KJ/m2, which is 25 times over that of the neat PLA. The relationship between the phase structure and physical performance of the blend was analyzed based on the compositions, surface tension, and physical characteristics of the neat components. Combining the compatibilization of the P3,4HB phase and ECO elastomer toughening played a crucial role in enhancing the mechanical properties of the blends.

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“…The 2 wt% compatibilizers induced more phase interfaces, promoted the mobility of polymer molecular chains, decreased the activation energy of polymer crystallization and improved crystallization of PLA 13 . The 4 wt% compatibilizers promoted the mobility of polymer molecular chains, and decreased heterogeneous nucleating agent of polymer crystallization and crystallization of PLA 3 …”

Section: Resultsmentioning

confidence: 99%

Effect of ionic liquid segments of copolymer on compatibilization process and dielectric behavior of polylactide/polyvinylidene fluoride blends

Wang

Cui

et al. 2020

J of Applied Polymer Sci

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Biodegradable polylactide (PLA) and polyvinylidene fluoride (PVDF) blends containing the copolymer of PEGMA and 1-vinyl-3-ethylimidazolium bromide (PMI) were prepared, and the effects of ionic liquid segments of PMI on the compatibility of PLA and PVDF were investigated by dielectric relaxation spectroscopy (DRS). PMI can obviously improve the compatibility of PLA and PVDF, compared with the copolymer of PEGMA and vinyl imidazole (PMV). DRS showed that the compatibility of PLA and PVDF was related to the relaxation behavior of the blends, which was identified with Maxwell-Wagner-Sillars (MWS) interfacial polarization. The ε' of PLA/PVDF/PMI blends was much higher than that of PLA/PVDF/PMV blends in the same temperature, resulting from the stimulation of MWS interfacial polarization by the ion mobility of PMI.

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Toughening Poly(lactic acid) with Imidazolium-based Elastomeric Ionomers

Cited by 26 publications

References 45 publications

Functionalized Elastomeric Ionomers Used as Effective Toughening Agents for Poly(lactic acid): Enhancement in Interfacial Adhesion and Mechanical Performance

Functionalized Elastomeric Ionomers Used as Effective Toughening Agents for Poly(lactic acid): Enhancement in Interfacial Adhesion and Mechanical Performance

Toughening Biosourced Poly(lactic acid) and Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) Blends by a Renewable Poly(epichlorohydrin-co-ethylene oxide) Elastomer

Effect of ionic liquid segments of copolymer on compatibilization process and dielectric behavior of polylactide/polyvinylidene fluoride blends

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