Preparation and Characteristic of PC/PLA/TPU Blends by Reactive Extrusion

Zhou, Yueyun; Luo, Lifa; Liu, Wenyong; Zeng, Guangsheng; Chen, Yi

doi:10.1155/2015/393582

Cited by 21 publications

(15 citation statements)

References 23 publications

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“…Polylactide is more and more commonly used in the production of composites reinforced with lignocellulosic fillers of natural origin [34][35][36][37] as well as in the production of blends with different polymers characterized by a significantly higher recommended processing temperature [38][39][40] or in contrast those more susceptible to thermal degradation [41,42]. The most commonly used technology for manufacturing biopolymers and their composites at an industrial scale is co-rotating twin-screw extrusion, due to its high throughput and mixing efficiency [43,44].…”

Section: Introductionmentioning

confidence: 99%

Correlation between Processing Parameters and Degradation of Different Polylactide Grades during Twin-Screw Extrusion

et al. 2020

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This article presents the effect of twin-screw extrusion processing parameters, including temperature and rotational speed of screws, on the structure and properties of four grades of polylactide (PLA). To evaluate the critical processing parameters for PLA and the possibilities for oxidative and thermomechanical degradation, Fourier-transform infrared spectroscopy (FT-IR), oscillatory rheological analysis, and differential scanning calorimetry (DSC) measurements were used. The influence of degradation induced by processing temperature and high shearing conditions on the quality of the biodegradable polyesters with different melt flow indexes (MFIs)was investigated by color analysis within the CIELab scale. The presented results indicate that considering the high-temperature processing of PLA, the high mass flow index and low viscosity of the polymer reduce its time of residence in the plastifying unit and therefore limit discoloration and reduction of molecular weight due to the degradation process during melt mixing, whereas the initial molecular weight of the polymer is not an essential factor.

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Section: Introductionmentioning

confidence: 99%

Correlation between Processing Parameters and Degradation of Different Polylactide Grades during Twin-Screw Extrusion

et al. 2020

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“…However, there are several other types of polyesters, which have already been used for blending with PC. Some of them, like polytrimethylene terephthalate PTT [14][15][16] or polylactic acid PLA [17][18][19] can be considered as more sustainable, as they are partly or fully biobased materials. The use of a PLA resin as the investigated blend component was the initial intention during the planning of the present study.…”

Section: Introductionmentioning

confidence: 99%

Development of Thermal Resistant FDM Printed Blends. The Preparation of GPET/PC Blends and Evaluation of Material Performance

Andrzejewski

Marciniak-Podsadna

2020

Materials

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The paper discusses the preparation of polymer blends based on the polyethylene terephthalate copolymer/polycarbonate (GPET/PC). Materials have been prepared in order to assess their applicability in the fused deposition modeling (FDM) 3D printing process. The tested key feature was the thermomechanical resistance, measured by head deflection temperature (HDT) and Vicat softening temperature (VST), the mechanical tests and dynamic mechanical thermal analysis (DMTA) were also performed. A clear relationship between the increasing content of PC in the blend properties was observed. DMTA analysis revealed significant changes in the glass transition temperature, which indicates the miscibility of this type of polymer system. The mechanical tests indicate a clear trend of stiffness and strength improvement along with the increasing share of PC phase in the structure. The increase in impact strength is also clear, however, compared to the results for a pure PC, the results obtained for GPET/PC blends are significantly lower. As part of the research, reference samples based on polyethylene terephthalate homopolymer (PET) and composite samples with addition of 10% talc were also prepared. The structure analysis for PET/PC(50/50) samples did not show miscibility. However, due to the formation of the PET crystalline phase, the thermomechanical resistance of these materials was visibly higher. Scanning electron microscopy (SEM) analysis confirmed a high degree of compatibility of the GPET/PC blend structure as indicated by the lack of visible signs of phase separation. This phenomenon is not observed for PET/PC blends, which confirms the different thermomechanical interactions of both tested polymer systems.

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“…Figure 5 illustrates the ATR‐FTIR spectra of TPU‐Gx containing different amounts of PCDL and GMS. In the infrared spectra of TPU‐Gx, the absorption peaks at 3342 cm −1 [ ν (NH)], 1731–1703 cm −1 [ ν (CO)], and 1230 cm −1 [ σ (NH), ν(CN)] are attributed to the typical absorption peaks of polyurethane 36 . The NCO absorption peak disappears at 2270 cm −1 , which indicates that the isocyanate group (NCO) of IPDI has completely reacted with OH.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, TPU can also be an available flexibilizer in improving the performance of polymer blends by carefully considering the molecular structure of all components. In previous research, TPU has been used as a compatibilizer for PC/PLA blends and PA6/PLA blends 36,37 …”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel polycarbonate‐based thermoplastic polyurethane elastomers compatibilizers with octadecyl side chains and their application in PC/PP blends

Liu

2021

Polymers for Advanced Techs

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With the aim to improve the compatibility of polycarbonate (PC)/polypropylene (PP) blends, a novel aromatic polycarbonate diol (PCDL) was synthesized by the transesterification reaction, then a series of polycarbonate‐based thermoplastic polyurethane elastomers compatibilizers (TPU‐Gx) with octadecyl side chains were successfully prepared by introducing different content of PCDL and glyceryl monostearate (2,3‐Dihydroxypropyl octadecenoate; GMS). The structures of synthesized products were confirmed by Fourier transform infrared spectroscopy and Nuclear magnetic resonance hydrogen spectroscopy. Thermogravimetry results showed that all TPU‐Gx had good thermal stability. The effects of TPU‐Gx on the compatibilization of PC/PP blends were investigated in the aspect of morphology, mechanical, thermal, and rheological properties. The results showed that all TPU‐Gx could enhance the interfacial adhesion between PC/PP and improve the mechanical properties of PC/PP blends. Among them, the addition of TPU‐G1.5 containing 6.0 wt% PCDL and 1.5 wt% GMS made PC/PP/TPU‐G1.5 blends show the highest impact strength, which increased by 54.1% when compared with that of pure PC/PP blends.

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Preparation and Characteristic of PC/PLA/TPU Blends by Reactive Extrusion

Cited by 21 publications

References 23 publications

Correlation between Processing Parameters and Degradation of Different Polylactide Grades during Twin-Screw Extrusion

Correlation between Processing Parameters and Degradation of Different Polylactide Grades during Twin-Screw Extrusion

Development of Thermal Resistant FDM Printed Blends. The Preparation of GPET/PC Blends and Evaluation of Material Performance

Synthesis of novel polycarbonate‐based thermoplastic polyurethane elastomers compatibilizers with octadecyl side chains and their application in PC/PP blends

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