Effect of lactic acid chain length on thermomechanical properties of <i>star</i>‐<scp>LA</scp>‐xylitol resins and jute reinforced biocomposites

Jahandideh, Arash; Esmaeili, Nima; Muthukumarappan, Kasiviswanathan

doi:10.1002/pi.5354

Cited by 17 publications

(13 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different methods have been reported for the production of branched polymers; however, a few studies have been dedicated to star‐shaped architecture . The star‐shaped lactic acid‐based resins (S‐LA) are synthesized by condensation of LA with the core molecule, followed by end‐functionalization of the branches with an end‐functionalizing (EF) agent .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of methacrylated star‐shaped poly(lactic acid) employing core molecules with different hydroxyl groups

Esmaeili

Jahandideh

Muthukumarappan

et al. 2017

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

A set of novel bio-based star-shaped thermoset resins was synthesized via ring-opening polymerization of lactide and employing different multi-hydroxyl core molecules, including ethylene glycol, glycerol, and erythritol. The branches were endfunctionalized with methacrylic anhydride. The effect of the core molecule on the melt viscosity, the curing behavior of the thermosets and also, the thermomechanical properties of the cured resins were investigated. Resins were characterized by Fourier-transform infrared spectroscopy, 13 C-NMR, and 1 H-NMR to confirm the chemical structure. Rheological analysis and differential scanning calorimetry analysis were performed to obtain the melt viscosity and the curing behavior of the studied star-shaped resins. Thermomechanical properties of the cured resins were also measured by dynamic mechanical analysis. The erythritol-based resin had superior thermomechanical properties compared to the other resins and also, lower melt viscosity compared to the glycerol-based resin. These are of desired characteristics for a resin, intended to be used as a matrix for the structural composites. Thermomechanical properties of the cured resins were also compared to a commercial unsaturated polyester resin and the experimental results indicated that erythritol-based resin with 82% bio-based content has superior thermomechanical properties, compared to the commercial polyester resin. Results of this study indicated that although core molecule with higher number of hydroxyl groups results in resins with better thermomechanical properties, number of hydroxyl groups is not the only governing factor for average molecular weight and melt viscosity of the uncured S-LA resins.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of methacrylated star‐shaped poly(lactic acid) employing core molecules with different hydroxyl groups

Esmaeili

Jahandideh

Muthukumarappan

et al. 2017

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The feed molar ratio of [LA] 0 /[OH] 0 was optimized as the degree of polymerization per arm (n) by the 1 H-NMR method becomes approximately 15, which is a minimum value to form sc-crystallites [36]. If the n value is much higher than 15, the subsequent crosslinking reaction with HDI becomes more difficult because of a lower hydroxy content.…”

Section: Characterization Of Hmsllaos Hmsdlaos and H3sclomentioning

confidence: 99%

“…Teng and Nie et al reported the controlled drug-release behavior of star-shaped PLLAs with a SB core [22]. Recently, network polymers derived from terminal functionalized star-shaped biodegradable polyesters have gathered considerable attention since the curing reaction of their at least three functional groups easily generates crosslinked structures and the crosslinking density can be controlled by changing the arm length [3,13,[29][30][31][32][33][34][35][36][37][38]. For example, Storey et al reported the networks prepared by the crosslinking reaction of hydroxy-terminated 3-armed random copolymers of D,L-LA and CL with L-lysine diisocyanate [30].…”

Section: Introductionmentioning

confidence: 99%

“…Chang et al reported the networks prepared by the crosslinking reaction of methacrylate-terminated pentaerythritol-based 4-armed star-shaped L-lactide oligomers [34]. Jahandideh et al reported the thermomechanical properties of cured products of methacrylate-functionalized star-shaped lactide oligomers with a XL core and their biocomposites with jute fibers [36]. Also, we reported pentaerythritol-based polymer networks (PEPN-4scLAO/2CLOs) prepared by reactions of methylenediphenyl 4,4 -diisocyanate (MDI), hydroxy-terminated two enantiomeric 4-armed star-shaped lactide oligomers bearing a pentaerythritol core (PE4LLAO and PE4DLAO) and a diethylene glycol-based hydroxy-terminated 2-armed ε-caprolactone oligomer (H2CLO) [37], and glycerol (GC)-based polymer networks (GCPN-3scLAO/2CLOs) by reactions of hexamethylene diisocyanate (HDI), hydroxy-terminated two enantiomeric 3-armed star-shaped lactide oligomers (GC3LLAO and GC3DLAO) bearing a GC core and H2CLO [38].…”

Section: Introductionmentioning

confidence: 99%

“…Jahandideh et al reported the thermomechanical properties of cured products of methacrylate-functionalized star-shaped lactide oligomers with a XL core and their biocomposites with jute fibers [36]. Also, we reported pentaerythritol-based polymer networks (PEPN-4scLAO/2CLOs) prepared by reactions of methylenediphenyl 4,4′-diisocyanate (MDI), hydroxy-terminated two enantiomeric 4-armed star-shaped lactide oligomers bearing a pentaerythritol core (PE4LLAO and PE4DLAO) and a diethylene glycol-based hydroxy-terminated 2-armed ε-caprolactone oligomer (H2CLO) [37], and glycerol (GC)-based polymer networks (GCPN-3scLAO/2CLOs) by reactions of hexamethylene diisocyanate (HDI), hydroxy-terminated Recently, network polymers derived from terminal functionalized star-shaped biodegradable polyesters have gathered considerable attention since the curing reaction of their at least three functional groups easily generates crosslinked structures and the crosslinking density can be controlled by changing the arm length [3,13,[29][30][31][32][33][34][35][36][37][38]. For example, Storey et al reported the networks prepared by the crosslinking reaction of hydroxy-terminated 3-armed random copolymers of D,L-LA and CL with L-lysine diisocyanate [30].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stereocomplexation, Thermal and Mechanical Properties of Conetworks Composed of Star-Shaped l-Lactide, d-Lactide and ε-Caprolactone Oligomers Utilizing Sugar Alcohols as Core Molecules

et al. 2017

View full text Add to dashboard Cite

Abstract:It is important to develop tailor-made biodegradable/biocompatible polymer networks usable for biomaterials whose thermal and mechanical properties are easily controlled by changing the composition. We synthesized sugar-alcohol-based polymer networks (SPN-mscLAO/3CLO, m = 4, 5 or 6) by the crosslinking reactions of erythritol, xylitol or sorbitol-based m-armed star-shaped L-lactide and D-lactide oligomers (HmSLLAO and HmSDLAO), a glycerol-based 3-armed star-shaped ε-caprolactone oligomer (H3SCLO) and hexamethylene diisocyanate (HDI) at the weight ratios of HmSLLAO/HmSDLAO = 1/1 and (HmSLLAO + HmSDLAO)/H3CLO = 100/0, 75/25, 50/50, 25/75 or 0/100). The influence of the arm number on the crystallization behavior, thermal and mechanical properties of SPN-mscLAO/3CLOs were systematically investigated by comparing with those of sugar-alcohol-based homochiral polymer network (SPN-mLLAO, m = 4, 5 or 6) prepared by the reaction of HmSLLAO and HDI. Stereocomplex (sc) crystallites are dominantly formed for SPN-mscLAO/3CLOs 100/0-25/75, whereas SPN-mLLAOs were amorphous. The higher order of melting temperature of sc-crystals for SPN-mscLAO/3CLOs 100/0-25/75 was m = 5 > m = 6 > m = 4. The sc-crystallinities of SPN-4scLAO/3CLOs 100/0-50/50 were significantly lower than those of SPN-mscLAO/3CLOs 100/0-50/50 (m = 5 and 6). The larger order of the sc-spherulite size at crystallization temperature of 110 • C was m = 5 > m = 6 > m = 4 for SPN-mscLAO/3CLO 100/0. The size and number of sc-spherulites decreased with increasing crystallization temperature over the range of 110-140 • C and with increasing CLO fraction. Among all the networks, SPN-5scLAO/3CLOs 75/25 and 50/50 exhibited the highest and second highest tensile toughnesses (21.4 and 20.3 MJ·m −3 ), respectively.

show abstract

Making vinyl ester resin greener: Succinic acid–glycerol‐derived reactive diluent as an alternative to styrene

Jahandideh

Moini

Bajgholi

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

A bio‐based reactive diluent (BRD) was synthesized from succinic acid and glycerol, and successfully copolymerized with epoxy acrylate (EA). Chemical structure of BRD was studied by nuclear magnetic resonance and Fourier transform infrared. The performance of vinyl ester resin compositions has been examined through differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis, as well as tensile and flexural tests. Results demonstrated good compatibility between EA and the BRD. Compared to styrene, the BRD contribution of 50 wt% enhanced the elastic modulus (~40%). Samples copolymerized with BRD or styrene, have shown a similar thermal stability. Mechanical properties of cured blends, containing up to 25 wt% of BRD, found to be superior than styrene‐diluted compartments. Viscosities of EA–BRD blends were in range of 3.25–0.43 Pa/s at 30°C. Inexpensive bio‐based source, good thermomechanical and rheological properties, and great compatibility with EA are of advantages of these BRD‐containing formulations.

show abstract

Effect of lactic acid chain length on thermomechanical properties of star‐LA‐xylitol resins and jute reinforced biocomposites

Cited by 17 publications

References 32 publications

Synthesis and characterization of methacrylated star‐shaped poly(lactic acid) employing core molecules with different hydroxyl groups

Synthesis and characterization of methacrylated star‐shaped poly(lactic acid) employing core molecules with different hydroxyl groups

Stereocomplexation, Thermal and Mechanical Properties of Conetworks Composed of Star-Shaped l-Lactide, d-Lactide and ε-Caprolactone Oligomers Utilizing Sugar Alcohols as Core Molecules

Making vinyl ester resin greener: Succinic acid–glycerol‐derived reactive diluent as an alternative to styrene

Contact Info

Product

Resources

About