Rheological and Thermal Properties of the PLA Modified by Electron Beam Irradiation in the Presence of Functional Monomer

Shin, Boo Young; Han, Do Hung; Narayan, Ramáni

doi:10.1007/s10924-010-0198-8

Cited by 48 publications

(31 citation statements)

References 34 publications

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“…Similarly, Quynh et al reported that the maximum radiation dose of 30 kGy in the presence of 3 wt% TAIC was successfully introduced as crosslinking structure to PLA. The PLA modified by electron beam irradiation at 20 kGy in the presence of 3 phr glycidyl methacrylate (GMA) showed improvement in melt strength, as shown by Shin et al …”

Section: Introductionmentioning

confidence: 66%

“…Similarly, Quynh et al [4] reported that the maximum radiation dose of 30 kGy in the presence of 3 wt% TAIC was successfully introduced as crosslinking structure to PLA. The PLA modified by electron beam irradiation at 20 kGy in the presence of 3 phr glycidyl methacrylate (GMA) showed improvement in melt strength, as shown by Shin et al [7] Chemical crosslinking via reactive extrusion in the presence of small amounts of initiator and crosslinking agent is another way to introduce crosslinked structures in PLA. Recently, Yang et al [8] reported that the crosslinking of PLA in the presence of a small amount of crosslinking agent TAIC and dicumyl peroxide (DCP) showed excellent heat stability.…”

Section: Introductionmentioning

confidence: 93%

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Rheological and thermal behavior of PLA modified by chemical crosslinking in the presence of ethoxylated bisphenol A dimethacrylates

Yamoum

Maia

Magaraphan

2016

Polymers for Advanced Techs

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Crosslinking structures can be partly introduced into PLA by melt mixing in a twin screw extruder with dicumyl peroxide (DCP) and ethoxylated bisphenol A dimethacrylates (Bis‐EMAs) as a crosslinking coagent. The study of DCP and Bis‐EMA contents on the melt rheology, thermal properties, dynamic mechanical properties and morphology of the reactive extruded pellets is presented. The results show that PLA with a DCP content higher than 3 phr exhibits increases in both the melt modulus and complex viscosity as compared with PLA. The introduction of DCP into PLA improved the thermal stability of the PLA. PLAs with various Bis‐EMA contents showed the optimum storage modulus and complex viscosity to occur at 5 phr Bis‐EMAs. Moreover, the glass transition, cold crystallization and melting temperature of PLAs decreased with increasing Bis‐EMA content. The crystallinity of the partly crosslinked PLAs was lower than that of PLA. Similar to the rheological results, the thermo‐mechanical properties showed that the storage modulus and loss modulus of the partly crosslinked PLAs increased with increasing Bis‐EMA contents up to 5 phr. In addition, these partly crosslinked PLAs showed rough surface or sea island‐like structure. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 93%

Rheological and thermal behavior of PLA modified by chemical crosslinking in the presence of ethoxylated bisphenol A dimethacrylates

Yamoum

Maia

Magaraphan

2016

Polymers for Advanced Techs

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“…Similar to all thermoplastic polymers, PLA exhibited Newtonian behavior at the low shear rates (<10 s -1 ) whereas it exhibited nonNewtonian behavior (shear thinning) at the high shear rates (>10 s -1 ) as shown in Figure 4. Many studies reported the rheological behavior of PLA and showed that PLA obeyed the power law (Equation (1)) over a certain range of shear rates and tem- [26] peratures in the same way where other polymers obeyed [21][22][23][24][25][26]:…”

Section: Properties Of Polylactic Acid 31 Rheological Propertiesmentioning

confidence: 99%

Properties and medical applications of polylactic acid: A review

Hamad¹,

Kaseem²,

Yang

et al. 2015

Express Polym. Lett.

602

306

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Abstract. Polylactic acid (PLA), one of the well-known biodegradable polyesters, has been studied extensively for tissue engineering and drug delivery systems, and it was also used widely in human medicine. A new method to synthesize PLA (ring-opening polymerization), which allowed the economical production of a high molecular weight PLA polymer, broadened its applications, and this processing would be a potential substitute for petroleum-based products. This review described the principles of the polymerization reactions of PLA and, then, outlined the various materials properties affecting the performance of PLA polymer, such as rheological, mechanical, thermal, and barrier properties as well as the processing technologies which were used to fabricate products based on PLA. In addition, the biodegradation processes of products which were shaped from PLA were discussed and reviewed. The potential applications of PLA in the medical fields, such as tissue engineering, wound management, drugs delivery, and orthopedic devices, were also highlighted.

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“…Moreover, Al-Itry et al [5] as well as Doi et al [6] argued that thermal reactions of PLA could be generated by random chain scission reactions of the ester groups. This degradation during processing could cause a decrease of the molecular weight, which results in processing difficulties related to the limited temperature window and makes PLA un-applicable into some processes where melt strength are important and dominant, such as foaming, blow molding and film blowing [7,8,10,37]. Meanwhile, to enlarge its processing window by limiting its thermal degradation, PLA need to be melt strengthened.…”

Section: Introductionmentioning

confidence: 99%

Reactive extrusion of PLA, PBAT with a multi-functional epoxide: Physico-chemical and rheological properties

Al-Itry

Lamnawar

Maazouz

2014

European Polymer Journal

193

127

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Rheological and Thermal Properties of the PLA Modified by Electron Beam Irradiation in the Presence of Functional Monomer

Cited by 48 publications

References 34 publications

Rheological and thermal behavior of PLA modified by chemical crosslinking in the presence of ethoxylated bisphenol A dimethacrylates

Rheological and thermal behavior of PLA modified by chemical crosslinking in the presence of ethoxylated bisphenol A dimethacrylates

Properties and medical applications of polylactic acid: A review

Reactive extrusion of PLA, PBAT with a multi-functional epoxide: Physico-chemical and rheological properties

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