Filler-Reinforced Elastomers Based on Functional Polyolefin Prepolymers

Ren, Ning; Matta, Megan E.; Martínez, Henry; Walton, Kim; Munro, Jeffrey C.; Schneiderman, Deborah K.

doi:10.1021/acs.iecr.6b00426

Cited by 11 publications

(6 citation statements)

References 63 publications

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“…In an attempt to further improve the properties of the PMVL elastomers and to reduce the total cost of the elastomer, we prepared composites containing the FS Aerosil R 812 . We recently demonstrated that this FS could be homogeneously dispersed in cross-linked hydrogenated polyolefins and also impart dramatic improvements in the mechanical properties . Although we also attempted to produce filler-reinforced materials using the tandem cross-linking strategy, we observed that the TBD catalyst used for the copolymerization reaction was intolerant of the FS.…”

Section: Resultsmentioning

confidence: 99%

“…53 We recently demonstrated that this FS could be homogeneously dispersed in cross-linked hydrogenated polyolefins and also impart dramatic improvements in the mechanical properties. 54 Although we also attempted to produce filler-reinforced materials using the tandem cross-linking strategy, we observed that the TBD catalyst used for the copolymerization reaction was intolerant of the FS. However, we found that FS-reinforced elastomers could easily be prepared using a sequential radical melt-blending route.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Renewable, Degradable, and Chemically Recyclable Cross-Linked Elastomers

Brutman

Hoe

Schneiderman

et al. 2016

Ind. Eng. Chem. Res.

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Most commercial elastomers, typified by vulcanized natural rubber, are cross-linked polymers and as such cannot easily be reprocessed or recycled. While some are derived from renewable resources, the majority are produced from petroleum feedstocks and do not easily degrade. In this study, renewable elastomers based on β-methyl-δ-valerolactone were produced using two different methodologies: (1) tandem copolymerization/cross-linking with a bis(six-membered cyclic carbonate); (2) cross-linking of a linear poly(β-methyl-δvalerolactone) homopolymer with a free-radical generator. The mechanical properties of these materials were investigated; tensile strengths of up to 12 MPa and elongations of up to 2000% were observed. Inclusion of a filler (fumed silica) was used to enhance the performance of the elastomers without significant loss of elasticity, with some composites exhibiting tensile strengths nearly double that of the neat elastomer. Aqueous degradation studies indicated that the materials were capable of degradation in acidic and basic conditions at 60 °C. Moreover, these cross-linked elastomers can also be chemically recycled, yielding monomer in high purity and yield (>91% and 93%, respectively).

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Renewable, Degradable, and Chemically Recyclable Cross-Linked Elastomers

Brutman

Hoe

Schneiderman

et al. 2016

Ind. Eng. Chem. Res.

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“…In this study, we examined the mechanical properties of CS/PVA/borax composite hydrogels using different fillers, namely, SiO 2 nanospheres, clay platelets, and CNFs. The effect of spherical fillers on the elastic modulus of rubbers has been discussed using the Guth–Smallwood–Einstein equation [ 33 , 34 , 35 ].

…”

Section: Resultsmentioning

confidence: 99%

Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers

Takeno

Shikano

Kikuchi

2022

Gels

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We investigated the mechanical properties of corn starch (CS)/poly(vinyl alcohol) (PVA)/borax hydrogels reinforced by clay platelets, silica (SiO2) nanospheres, or cellulose nanofibers (CNFs). The effects of these reinforcing agents on the tensile properties of the hydrogels were quite different; the fracture stress of SiO2/CS/PVA/borax composite hydrogels increased with SiO2 concentration, whereas that of clay/CS/PVA/borax composite hydrogels was high at a low clay concentration but low at high clay concentrations; for CNF/CS/PVA/borax composite hydrogels, although the elastic modulus was highly enhanced by adding CNF, the fracture stress was very low because of the stress relaxation during the elongation. This result came from differences in the dispersibility of each filler and the reinforcing ability. These composite hydrogels were constructed by multi-crosslinking, such as hydrogen bonding between CS and PVA, CS and PVA crystals, complexation between borate and PVA (partly CS), and the crosslinking between each filler and polymer. The self-healing ability of SiO2 and clay composite hydrogels was examined. As a result, the SiO2/CS/PVA/borax composite hydrogels possessed an excellent self-healing ability, whereas the clay/CS/PVA/borax composite hydrogels had a poor self-healing ability.

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“…: Filler particles may agglomerate, and need to be broken up to achieve good dispersion. Silica particles are harder to disperse than carbon black particles, due to the stronger interaction between silica particles (hydrogen bonds) than between carbon black particles (van der Waals) [ 5 , 6 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Cyclic Compression Testing of Three Elastomer Types—A Thermoplastic Vulcanizate Elastomer, a Liquid Silicone Rubber and Two Ethylene-Propylene-Diene Rubbers

Persson

Andreassen

2022

Polymers

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Thermoplastic elastomer vulcanizate (TPV) and liquid silicone rubber (LSR) are replacement candidates for ethylene-propylene-diene rubbers (EPDM), as they offer the possibility for two-component injection moulding. In this study, these material types were compared side by side in cyclic compression tests. The materials were also characterized to provide details on the formulations. Compared to the rubbers, the TPV had higher compression set (after a given cycle) and hysteresis loss, and a stronger Mullins effect. This is due to the thermoplastic matrix in the TPV. The LSR had lower compression set (after a given cycle) than the EPDM, but stronger Mullins effect and higher relative hysteresis loss. These differences between the LSR and the EPDM are likely due to differences in polymer network structure and type of filler. Methods for quantifying the Mullins effect are proposed, and correlations between a Mullins index and parameters such as compression set are discussed. The EPDMs showed a distinct trend in compression set, relative hysteresis loss and relaxed stress fraction vs. strain amplitude; these entities were almost independent of strain amplitude in the range 15–35%, while they increased in this range for the TPV and the LSR. The difference between the compression set values of the LSR and the EPDM decreased with increasing strain amplitude and increasing strain recovery time.

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Filler-Reinforced Elastomers Based on Functional Polyolefin Prepolymers

Cited by 11 publications

References 63 publications

Renewable, Degradable, and Chemically Recyclable Cross-Linked Elastomers

Renewable, Degradable, and Chemically Recyclable Cross-Linked Elastomers

Mechanical Performance of Corn Starch/Poly(Vinyl Alcohol) Composite Hydrogels Reinforced by Inorganic Nanoparticles and Cellulose Nanofibers

Cyclic Compression Testing of Three Elastomer Types—A Thermoplastic Vulcanizate Elastomer, a Liquid Silicone Rubber and Two Ethylene-Propylene-Diene Rubbers

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