Structure-property relations in an injection-moulded, rubber-toughened, semicrystalline polyoxymethylene

Pecorini, Thomas J.; Hertzberg, R. W.; Manson, J. A.

doi:10.1007/bf00587702

Cited by 18 publications

(12 citation statements)

References 23 publications

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“…The mechanical properties and the morphologies of ternary blends of polycarbonate with a mechacrylated butadiene-styrene impact modifier and various brittle polymers were investigated by Paul et al They found, very interestingly, that for a better toughness the modifier should be located in the brittle polymer in ternary blend [12]. There are several factors, such as composition, processing conditions, adhesion between filler and elastomer, which may affect the dispersion and microstructure [3][4][5][6][7][8][9][10]. Most work is qualitative on toughening mechanism while the quantitative relationship between morphology and property has not been established yet so far.…”

Section: Introductionmentioning

confidence: 99%

“…Adding inorganic filler can enhance the stiffness but result in a decrease of toughness. To overcome the drawback resulted by only adding elastomer or filler, a lot of work has been done on polymer/elastomer/filler ternary system, where both elastomer and filler were used to enhance the toughness and stiffness simultaneously [1][2][3][4][5][6][7][8][9][10][11]. To achieve the best combination of mechanical properties, the key is to control the dispersion and phase morphology of ternary composites.…”

Section: Introductionmentioning

confidence: 99%

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Study on the phase structures and toughening mechanism in PP/EPDM/SiO2 ternary composites

Yang

Zhang

Guo

et al. 2006

Polymer

188

135

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the phase structures and toughening mechanism in PP/EPDM/SiO2 ternary composites

Yang

Zhang

Guo

et al. 2006

Polymer

188

135

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“…Evidence of prior melting of the twin material was provided by small‐angle X‐ray and electron microscopy observations of the presence of lamellae after heating. Colson and coworkers13, 14 observed the behavior of individual fibers of POM upon heating, using an electron microscope, and they found that twin crystals melted at a lower temperature than crystals that were entirely of the main orientation. Mucha15, 16 reported the thermogravimetric decomposition of the POM homopolymer in the molten state in nitrogen and in an air atmosphere for comparison.…”

Section: Introductionmentioning

confidence: 99%

¹H‐NMR investigation of the thermooxidation degradation of poly(oxymethylene) copolymers

Pan¹,

Li²,

Cao³

2004

J of Applied Polymer Sci

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ABSTRACT:The thermooxidative degradation of poly-(oxymethylene) copolymer (CPOM-Y) powder was studied in air in 150°C. The effect of the sequence distribution of degraded poly(oxymethylene) (POM) samples on the thermal decomposition behavior was investigated with 1 H-NMR and gas chromatography/mass spectrometry. The results showed that the degradation process of CPOM-Y could be divided into three stages with a gradually increasing degradation rate. The change in the sequence molar fractions agreed with the fact that the ethylene oxide (EO) units had higher thermal stability, and the degradation of POM was due to the decomposition of formal units. At the beginning, CPOM-Y tended to split off formaldehyde, starting at the chain ends, some of which were not ended by EO units. In stage 2, the thermooxidation of POM occurred in the amorphous phase. In stage 3, no obvious rules for the changes in the sequence contents were obtained from NMR results, and this indicated further random chain scission and unzipping occurring heavily in the crystalline bulk. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: [577][578][579][580][581][582][583] 2004

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“…The addition was at least 20 wt%. However, the tensile strength of POM decreases significantly when an elastomer is used for toughening . PEO is a better toughening agent for POM than thermoplastic elastomer and rubber.…”

Section: Resultsmentioning

confidence: 99%

Crystallization behavior and toughening mechanism of poly(ethylene oxide) in polyoxymethylene/poly(ethylene oxide) crystalline/crystalline blends

Liu

Zhou

Chen

et al. 2014

Polymers for Advanced Techs

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In this study, the unique crystallization behavior of poly(ethylene oxide) (PEO) in polyoxymethylene (POM)/PEO crystalline/crystalline blends was examined in detail. This study was the first to report the typical fractionated crystallization of PEO in POM/PEO blends when PEO is fewer than 30 wt.%. The delayed crystallization temperature of PEO was confirmed at about 5°C to 14°C by using differential scanning calorimetry and perturbation–correlation moving‐window 2D correlation IR spectroscopy. Wide‐angle X‐ray diffraction indicates that no new crystal structures or co‐crystals were generated in POM/PEO. The statistical calculations of scanning electron microscopy photos show that the average diameter of PEO particles is 0.227 µm to 1.235 µm and that the number of small particles is as many as 109 magnitudes per cm3. Theory analysis establishes that the delayed crystallization of PEO is a heterogeneous nucleation process and not a homogeneous nucleation process. A significant toughening effect of PEO to POM was also observed. The impact strength of POM/PEO acquires a maximum of 10.5 kJ/m2 when PEO content is 5%. The impact strength of the blend increases by 78.0% compared with pure POM. To improve the toughening effect, the best particle size is established between 0.352 and 0.718 µm, with a PEO particle spacing of 0.351 µm to 0.323 µm. The number of corresponding particles was 0.887 × 109 per cm3 to 3.240 × 109 per cm3. A PEO toughening model for POM was proposed to provide a new and effective way to solve the problem of POM toughening. Copyright © 2014 John Wiley & Sons, Ltd.

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Structure-property relations in an injection-moulded, rubber-toughened, semicrystalline polyoxymethylene

Cited by 18 publications

References 23 publications

Study on the phase structures and toughening mechanism in PP/EPDM/SiO2 ternary composites

Study on the phase structures and toughening mechanism in PP/EPDM/SiO2 ternary composites

¹H‐NMR investigation of the thermooxidation degradation of poly(oxymethylene) copolymers

Crystallization behavior and toughening mechanism of poly(ethylene oxide) in polyoxymethylene/poly(ethylene oxide) crystalline/crystalline blends

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Structure-property relations in an injection-moulded, rubber-toughened, semicrystalline polyoxymethylene

Cited by 18 publications

References 23 publications

Study on the phase structures and toughening mechanism in PP/EPDM/SiO2 ternary composites

Study on the phase structures and toughening mechanism in PP/EPDM/SiO2 ternary composites

1H‐NMR investigation of the thermooxidation degradation of poly(oxymethylene) copolymers

Crystallization behavior and toughening mechanism of poly(ethylene oxide) in polyoxymethylene/poly(ethylene oxide) crystalline/crystalline blends

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¹H‐NMR investigation of the thermooxidation degradation of poly(oxymethylene) copolymers