Blends of polycarbonate and polyacetal

Chang, Feng‐Chih; Yang, Mi-Yun; Wu, Jiann-Shing

doi:10.1016/0032-3861(91)90419-j

Cited by 28 publications

(17 citation statements)

References 9 publications

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“…The above properties were strongly dependent on the composition ratio, processing conditions, and resulting morphology [15]. Chang et al [12] studied the immiscible blends of polycarbonate (PC) and POM. Incorporation PC into POM significantly increased the modulus and yield strength of the latter.…”

Section: Introductionmentioning

confidence: 99%

Effects of compatibilizer and testing speed on the mechanical and morphology behaviors of co-continuous amorphous copolyester-polyoxymethylene blends

2005

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Co-continuousamorphous copolyester (PETG)/ polyoxymethylene (POM) (50/50 wt%/wt%) blends were prepared using a twin screw extruder followed compression molding. Two types of thermoplastic polyurethane (TPU) (i.e., polyester-based and polyether-based) were used to compatibilize the blends system. The thermal properties were characterized by using differential scanning calorimetry (DSC). The mechanical properties of the co-continuous PETG/POM blends were studies through flexural and single-edge notch tensile test (SEN-T). The SEN-T test was performed at three different testing speeds; 1, 100, and 500 mm/min. Scanning electron microscope (SEM) was used to access the fracture surface morphology. The flexural strength of the PETG/POM blends was decreased in the presence of TPU. This was attributed to the elastomeric nature of the TPU. The compatibilizing effects of TPU on the PETG/POM blends were proven by moderate improvement in the fracture toughness and confirmed by the SEM observation. The SEN-T fractured surface of the compatibilized blends showed gross matrix shear yielding as compared to the uncompatibilized system. The K c values of the PETG/ POM blends decreased as the testing speed increased. The optimum toughening effect was observed in PETG/ POM blends compatibilized with polyether-based TPU at testing speed of 100 mm/min. The polyether-based TPU is a more efficient compatibilizer, because the amount required is one-half that of the polyester-based counterpart to achieve the same K c value. This was attributed to the elastomeric nature of the polyether-based TPU. The softer nature of polyether-based TPU could provide better toughening effect than the polyester-based TPU, which is relatively harder in nature. POLYM. ENG. SCI., 45: 710 -719, 2005.

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Section: Introductionmentioning

confidence: 99%

Effects of compatibilizer and testing speed on the mechanical and morphology behaviors of co-continuous amorphous copolyester-polyoxymethylene blends

2005

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“…41 The synergism was observed in other immiscible blends. [32][33][34] Inclusion of PVAc to phenoxy remarkably decreased the elongations both at yield and at break. In particular, the elongation at break of the 80/20 phenoxy/PVAc blend is profoundly decreased.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

“…In the phase separation induced by polymerization, the morphology can be determined by the competitive processes of phase separation, i.e., phase coarsening and polymerization. Yamanaka and Inoue [32][33][34][35][36] proposed that the phase separation in thermoplastic-modified epoxy resins occur via spinodal decomposition.…”

Section: Scanning Electronic Microscopymentioning

confidence: 99%

Poly(hydroxyether of bisphenol A)/poly(vinyl acetate) blends:In situ polymerization preparation, morphology, and properties

Zheng

Guo

Chan

1999

J. Polym. Sci. A Polym. Chem.

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“…However, like many unmodified polymer matrices, POM is extremely brittle in notched impact. Therefore, many studies have reported the toughening of POM by blending POM with an amorphous polymer 7–14. For example, Cherdon et al7 disclosed improving the impact strength of the POM by blending with various copolymers.…”

Section: Introductionmentioning

confidence: 99%

Blends of poly(propylene) and polyacetal compatibilized by ethylene vinyl alcohol copolymers

Huang

Cheng

et al. 2003

J of Applied Polymer Sci

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Polymer blends of poly(propylene) (PP) and polyacetal (polyoxymethylene, POM) with ethylene vinyl alcohol (EVOH) copolymers were investigated by differential scanning calorimetry (DSC), rheological, tensile, and impact measurements, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The PP-POM-EVOH blends were extruded with a co-rotating twin-screw extruder. The ethylene group in the EVOH is partially miscible with PP, whereas the hydroxyl group in the EVOH can form hydrogen bonding with POM. The EVOH tends to reside along the interface, acting as a surfactant to reduce the interfacial tension and to increase the interfacial adhesion between the blends. Results from SEM and mechanical tests indicate that a small quantity of the EVOH copolymer or a smaller vinyl alcohol content in the EVOH copolymer results in a better compatibilized blend in terms of finer phase domains and better mechanical properties.

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Blends of polycarbonate and polyacetal

Cited by 28 publications

References 9 publications

Effects of compatibilizer and testing speed on the mechanical and morphology behaviors of co-continuous amorphous copolyester-polyoxymethylene blends

Effects of compatibilizer and testing speed on the mechanical and morphology behaviors of co-continuous amorphous copolyester-polyoxymethylene blends

Poly(hydroxyether of bisphenol A)/poly(vinyl acetate) blends:In situ polymerization preparation, morphology, and properties

Blends of poly(propylene) and polyacetal compatibilized by ethylene vinyl alcohol copolymers

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