Influence of accelerated weathering on the physical and structural properties of poly(lactic-acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blends

Antunes, A Paula M; Luyt, Adriaan S.; Popelka, Anton; Mahmoud, Abdelrahman; Aljarod, Omar; Hassan, Mohammad K.; Kasák, Peter

doi:10.3144/expresspolymlett.2021.58

Cited by 8 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, PHB rubber copolymers (PHB‐ rub ) were reported to act as a combination of nucleating and plasticizing agents to accelerate the crystallization of PLA in PLA/PHB‐ rub blends 23 . It was also frequently reported that PHAs in PLA/PHAs blends served as nucleating agents to promote the crystallization of PLA, such as PHB, 24 PHBV, 25 and P34HB 26 . Besides, the PHB phase also served as a spherulite growth‐accelerating agent to accelerate the crystallization of PLA 27 .…”

Section: Introductionmentioning

confidence: 99%

Toward heat resistant polylactide blend fibers via incorporation of low poly[(R)‐3‐hydroxybutyrate‐co‐4‐hydroxybutyrate] content

Shi

Huang

Li³

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

Blending high content of polyhydroxyalkanoates (PHAs ≥ 30 wt.%) with polylactide (PLA) provides an effective strategy to significantly improve heat resistance of PLA fibers. However, it has proven challenging to maintain good spinnability of the PLA/PHAs blends with the high content of PHAs. In this study, a series of poly(L‐lactide) (PLLA)/poly[(R)‐3‐hydroxybutyrate‐co‐4‐hydroxybutyrate] (P34HB) blend fibers with low P34HB content (≤ 8 wt.%) is successfully fabricated with excellent spinnability. The incorporation of P34HB contributes to a substantially improved heat resistance of the PLLA/P34HB blend fibers, as evidenced by a notable reduction in boiling water shrinkage from ca. 80% to 9%. This exceptionally improved heat resistance is closely related to substantial increase in crystallinity of PLLA in the blend fibers. Specifically, the addition of low P34HB content remarkably enhances chain mobility of PLLA chains, as such reduces crystallization half‐times (t1/2) and accelerates crystallization of PLLA. In fact, the amorphous P34HB phase favors crystal growth of PLLA phase rather than heterogeneous nucleation inferred previously. These results provide a facile and effective method to produce PLLA/P34HB blend fibers with enhanced heat resistance and sound spinnability.

show abstract

Section: Introductionmentioning

confidence: 99%

Toward heat resistant polylactide blend fibers via incorporation of low poly[(R)‐3‐hydroxybutyrate‐co‐4‐hydroxybutyrate] content

Shi

Huang

Li³

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Figure 3 shows spectra of PHBV, CNT-rec, and pristine CNT. In the PHBV spectra, the characteristic bands of this neat polymer are verified, which are present in other works in the literature [33,60,61]. FT-IR was used to characterize structural changes in the CNT-rec from the biodegradation process compared to the pristine CNT.…”

Section: Ft-ir Spectroscopymentioning

confidence: 57%

Evaluation of the use of carbon nanotubes recovered from a biodegradation process in the production of new biodegradable polymer nanocomposites

Silva¹,

Girotto²,

Montanheiro³

et al. 2023

Express Polym. Lett.

View full text Add to dashboard Cite

The search for environmentally friendly materials has motivated a lot of investigations in academia and industry. In this regard, biodegradable polymers have stood out as an alternative material mainly to replace synthetic polymers and in the production of materials from renewable resources [1, 2]. However, with the advancement in the production and use of biodegradable polymers, new questions have arisen in the literature. The effective biodegradation of these materials when disposed of in a conducive environment. The possibility of recycling increases their useful life

show abstract

“…To further tailor and improve the crystallinity of PLLA, it is necessary to obtain an in‐depth understanding on the true mechanism of nucleation and growth of PLLA in the PLLA/PHAs blends. It has been frequently reported that the PHAs phases in the PLLA/PHAs blends served as nucleating agents to accelerate the overall crystallization of PLLA, such as PHB, 30,31 P34HB, 32 and PHBV 33–35 . Besides, the PHAs phases including PHB and P34HB were found to act as spherulite growth‐accelerating or plasticizing agents, enhancing the crystallization of PLLA 29,36 .…”

Section: Introductionmentioning

confidence: 99%

“…It has been frequently reported that the PHAs phases in the PLLA/PHAs blends served as nucleating agents to accelerate the overall crystallization of PLLA, such as PHB, 30,31 P34HB, 32 and PHBV. [33][34][35] Besides, the PHAs phases including PHB and P34HB were found to act as spherulite growth-accelerating or plasticizing agents, enhancing the crystallization of PLLA. 29,36 Considering inferior self-nucleation and chain diffusion of PLLA in homogeneous state, 11 an effective strategies should be directed to accelerate the nucleation and growth of PLLA synergistically.…”

mentioning

confidence: 99%

Polylactide/poly[(R)‐3‐hydroxybutyrate] (PHB) blend fibers with superior heat‐resistance: Effect ofPHBon crystallization

Huang

Shi

Wang³

et al. 2023

Polymers for Advanced Techs

View full text Add to dashboard Cite

Blending low content of poly[(R)‐3‐hydroxybutyrate‐co‐4‐hydroxybutyrate] (P34HB ≤8 wt %) with poly(L‐lactide) (PLLA) has proven effective in enhancing heat resistance of PLLA fibers. Unfortunately, the enhancement is relatively limited with boiling water shrinkage of PLLA/P34HB blend fibers reduced to 9.9% at most. In this study, a series of PLLA/poly[(R)‐3‐hydroxybutyrate] (PHB) blend fibers with low PHB content (≤8 wt %) was prepared with sound spinnability. Surprisingly, the PLLA/PHB blend fibers showed much lower boiling water shrinkage than the PLLA/P34HB blend fibers with the same blend ratio. In particular, the boiling water shrinkage was dropped from ca. 80% for neat PLLA fibers to 9.9% for the PLA/P34HB blend fibers and further to 3.8% for the PLA/PHB blend fibers with 8 wt % P34HB or PHB added. Such an exceptionally improved heat resistance of the PLLA/PHB blend fibers could be closely related to an increase in crystallinity (Xc,PLLA) of the PLLA phase. Specifically, the mobility of the PLLA segments was promoted in the presence of PHB, along with notably improved orientation of the PLLA phase in the PLLA/PHB blend fibers. More importantly, investigation on crystallization behaviors revealed that the PHB phase served as an effective nucleating agent to accelerate the overall crystallization of PLLA. By contrast, the P34HB phase only acted as spherulite growth‐accelerating and/or nucleation‐assisting agents. These findings help provide a facile and effective strategy to improve heat resistance of PLLA fibers more significantly.

show abstract

Influence of accelerated weathering on the physical and structural properties of poly(lactic-acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blends

Cited by 8 publications

References 0 publications

Toward heat resistant polylactide blend fibers via incorporation of low poly[(R)‐3‐hydroxybutyrate‐co‐4‐hydroxybutyrate] content

Toward heat resistant polylactide blend fibers via incorporation of low poly[(R)‐3‐hydroxybutyrate‐co‐4‐hydroxybutyrate] content

Evaluation of the use of carbon nanotubes recovered from a biodegradation process in the production of new biodegradable polymer nanocomposites

Polylactide/poly[(R)‐3‐hydroxybutyrate] (PHB) blend fibers with superior heat‐resistance: Effect ofPHBon crystallization

Contact Info

Product

Resources

About