The Effect of Injection Speed on Morphology and Mechanical Properties of Polyoxymethylene/Poly(Lactic Acid) Blends

Mathurosemontri, Suchalinee; Auwongsuwan, Putinun; Nagai, Satoshi; Hamada, Hiroyuki

doi:10.1016/j.egypro.2014.07.131

Cited by 20 publications

(16 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interface existing between the POM and PLA phases may weaken the stress transfer during the tensile and impact fracture in spite of the partial miscibility of POM with PLA. The decrement in tensile and impact performance is still limited compared to other immiscible POM-based blending systems [29,35]. However, there are highly negative results in tensile and impact performance when the PLA loading is higher than 30 wt %, implicating that the stress transfer effect is deteriorated significantly with an increase of additional phase.…”

Section: Resultsmentioning

confidence: 99%

“…Huan et al [34] reported an investigation on the morphology, crystallization, rheology, and mechanical properties of PLA/POM blends so as to improve the heat resistance of PLA. Moreover, Mathurosemontri et al [35] studied the effect of injection speed on morphology and mechanical properties of POM/PLA blends and found that high injection speed could enhance phase distribution of PLA in the POM domain and thus improved the mechanical properties of the blends. However, these studies mainly focused on the fundamental issues of polymer physics in the POM/PLA blending system, and they are seldom involved in the application development.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of Polyoxymethylene/Polylactide Blends for a Potentially Biodegradable Material: Crystallization Kinetics, Lifespan Prediction, and Enzymatic Degradation Behavior

Wang

et al. 2019

Polymers

View full text Add to dashboard Cite

This paper reported the development of polyoxymethylene (POM)/polylactide (PLA) blends for a potentially biodegradable material. A series of POM/PLA blends at different weight ratios were prepared by melt extrusion with a twin-screw extruder, and their mechanical properties, crystallization behavior and kinetics, thermal degradation kinetics and stability, lifespan prediction and enzymatic degradation behavior were investigated extensively. POM and PLA were found to be partially miscible in the melt state at low temperature and become phase-separated at elevated temperatures, and their blends exhibited a typical lower critical solution temperature behavior. There were two distinct glass transition temperatures (Tg) observed for POM/PLA blends at any mass ratios when quenched from the homogeneous state, and both POM and PLA domains showed an apparent depression in their respective Tg’s in the blends. Owing to the partial miscibility between two domains, the tensile strength and impact toughness of POM/PLA blends gradually decreased with an increase of PLA content, but their flexural strength and modulus presented an increasing trend with PLA content. The studies on non-isothermal and isothermal crystallization behaviors of the blends indicated that the crystallization rates of the blends decreased continually with increasing the PLA content, confirming that the crystallization of POM domain was controlled by the molecular-confined mechanism. The introduction of PLA into POM not only led to a slight increase of thermal stability of POM domain at low PLA contents but also shortened the lifespan of the blends, favoring the natural degradation of the blends. The POM/PLA blends exhibited an improvement in partially biodegradable performance with an increase of PLA content and their mass loss reached up to 25.3 wt % at the end of 48-h enzymatic degradation when 50 wt % of PLA was incorporated.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Polyoxymethylene/Polylactide Blends for a Potentially Biodegradable Material: Crystallization Kinetics, Lifespan Prediction, and Enzymatic Degradation Behavior

Wang

et al. 2019

Polymers

View full text Add to dashboard Cite

show abstract

“…The tensile strength and elongation at break of pure PP are 37.79 MPa and 9%, respectively, while these values for SBS are 25.14 MPa and 687%, respectively. The tensile stress at 100% of SBS is 4.64 MPa but pure PP had no numerical value because the tensile rate is too fast for rigid PP . Tensile stress at 100% is inversely proportional to SBS content.…”

Section: Resultsmentioning

confidence: 99%

A novel combination of sandwich and co‐continuous structure based on polypropylene and styrene‐butadiene‐styrene block copolymer formed with wide range of polypropylene content

Wang

Zhang

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

The styrene-butadiene-styrene block copolymer (SBS)/polypropylene (PP) blends with a unique sandwich layered cocontinuous structure were prepared by melt compounding. Differing from single conventional co-continuous and sandwich structure, this structure was formed, where pure PP and co-continuous SBS/PP phase acting as the face sheets and core. Even though the volume content was 20 or 10 vol %, PP always amazingly formed a continuous phase in SBS/PP blends, whereas the morphology of SBS phase relatively changed from dispersed particles to continuous network as its content increased to 50 vol %. For immiscible SBS/PP blends, due to the huge difference of complex viscosity and surface tension between SBS and PP, a pure PP layer existed on the surface of blends which can be ascribed to the PP enrichment. Herein, the structure of blends with more than 50 vol % SBS was presented as sandwich layered co-continuous structure by combining the pure PP layer and co-continuous structure. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46580.

show abstract

“…Polyoxymethylene (POM) is a semicrystalline thermoplastic with excellent chemical resistance, mechanical properties, and mold ability . It has been widely applied in the fields of vehicles, electronics applications, and precision machinery …”

Section: Introductionmentioning

confidence: 99%

“…[29][30][31] It has been widely applied in the fields of vehicles, electronics applications, and precision machinery. 32 Recently, several literatures reported some interesting influences of POM on PLA due to the presence of intermolecular interactions, including its amazing microstructure, thermal, and mechanical properties. [33][34][35] Qiu et al 33 researched the miscibility and interaction of PLA with POM using time-resolved FTIR spectroscopy between 40 and 190 8C.…”

Section: Introductionmentioning

confidence: 99%

Improvement of microstructures and properties of poly(lactic acid)/poly(ε‐caprolactone) blends compatibilized with polyoxymethylene

Song

Huang

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Incompatibility of poly(lactic acid)/poly(ɛ‐caprolactone) (PLA/PCL) (80:20) and (70:30) blends were modified by incorporation of a small amount of polyoxymethylene (POM) (≤3 phr). Impact of POM on microstructures and tensile property of the blends were investigated. It is found that the introduction of POM into the PLA/PCL blends significantly improves their tensile property. With increasing POM loading from zero to 3 phr, elongation at break increases from 93.2% for the PLA/PCL (70:30) sample to 334.8% for the PLA/PCL/POM (70:30:3) sample. A size reduction in PCL domains and reinforcement in interfacial adhesion with increasing POM loading are confirmed by SEM observations. The compatibilization effect of POM on PLA/PCL blends can be attributed to hydrogen bonding between methylene groups of POM and carbonyl groups of PLA and PCL. In addition, nonisothermal and isothermal crystallization behaviors of PLA/PCL/POM (70:30:x) samples were investigated by using differential scanning calorimetry and wide angle X‐ray diffraction measurements. The results indicate that the crystallization dynamic of PLA matrix increases with POM loadings. It can be attributed to the fact that POM crystals have a nucleating effect on PLA. While crystallization temperature is 100 °C, crystallization half‐time can reduce from 9.4 to 2.0 min with increasing POM loading from zero to 3 phr. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46536.

show abstract

The Effect of Injection Speed on Morphology and Mechanical Properties of Polyoxymethylene/Poly(Lactic Acid) Blends

Cited by 20 publications

References 6 publications

Development of Polyoxymethylene/Polylactide Blends for a Potentially Biodegradable Material: Crystallization Kinetics, Lifespan Prediction, and Enzymatic Degradation Behavior

Development of Polyoxymethylene/Polylactide Blends for a Potentially Biodegradable Material: Crystallization Kinetics, Lifespan Prediction, and Enzymatic Degradation Behavior

A novel combination of sandwich and co‐continuous structure based on polypropylene and styrene‐butadiene‐styrene block copolymer formed with wide range of polypropylene content

Improvement of microstructures and properties of poly(lactic acid)/poly(ε‐caprolactone) blends compatibilized with polyoxymethylene

Contact Info

Product

Resources

About