Relationship between structure and dynamic mechanical properties of thermoplastic polyurethane elastomer containing bi‐soft segment

AbstractA series of long glass fiber (LGF)-reinforced epoxy resin (ER), thermoplastic polyurethane (TPU) elastomers, and poly(methyl methacrylate) (PMMA) composites were prepared by using self-designed impregnation device. Dynamic mechanical properties of the LGF/ER/TPU/PMMA composites have been investigated by using dynamic mechanical thermal analysis (DMA). The results indicated that the content of PMMA and TPU and scanning frequency had important influence on dynamic mechanical properties and glass transition of the LGF/ER/TPU/PMMA composites. In addition, the Arrhenius relationship has been used to calculate the activation energy of α-transition of the LGF/ER/TPU/PMMA composites. The thermal properties of the LGF/ER/TPU/PMMA composites were studied by thermogravimetric analysis (TGA). Morphology and mechanical properties of the composites are investigated by scanning electron microscopy (SEM), a universal testing machine, and a ZBC-4 Impact Pendulum.

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Fabrication and Properties of a Bio-Based Biodegradable Thermoplastic Polyurethane Elastomer

Polymers ◽

10.3390/polym11071121 ◽

2019 ◽

Vol 11 (7) ◽

pp. 1121

Author(s):

Zhaoshan Wang ◽

Jieqiong Yan ◽

Tongyao Wang ◽

Yingying Zai ◽

Liyan Qiu ◽

...

Keyword(s):

Soft Segment ◽

Thermoplastic Polyurethane ◽

Average Molecular Weight ◽

Sebacic Acid ◽

Polyurethane Elastomer ◽

Two Phase ◽

Elongation At Break ◽

Atomic Force ◽

Melt Polycondensation ◽

Thermoplastic Polyurethane Elastomer

Using the melt polycondensation of five bio-based aliphatic monomers (succinic acid, sebacic acid, fumaric acid, 1,3-propanediol, and 1,4-butanediol), we first synthesized the more flexible and biodegradable polyester diols (BPD) with an average molecular weight of 3825. Then, the BPD was polymerized with excessive 4,4′-diphenylmethane diisocyanate (MDI). Finally, the molecular chain extender of 1,4-butanediol (BDO) was used to fabricate the biodegradable thermoplastic polyurethane elastomer (BTPU), comprising the soft segment of BPD and the hard segment polymerized by MDI and BDO. Atomic force microscope (AFM) images showed the two-phase structure of the BTPU. The tensile strength of the BTPU containing 60% BPD was about 30 MPa and elongation at break of the BTPU was over 800%. Notably, the BTPU had superior biodegradability in lipase solution and the biodegradation weight loss ratio of the BTPU containing 80% BPD reached 36.7% within 14 days in the lipase solution.

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Effects of poly(styrene-co-maleic anhydride) on the performance of LGF/TPU/ABS composites

Science and Engineering of Composite Materials ◽

10.1515/secm-2014-0343 ◽

2016 ◽

Vol 23 (5) ◽

pp. 475-480 ◽

Cited By ~ 1

Author(s):

Wulei Zhou ◽

Jian Xiao ◽

Fang Liu ◽

Shuhao Qin

Keyword(s):

Mechanical Properties ◽

Maleic Anhydride ◽

Glass Fiber ◽

Thermoplastic Polyurethane ◽

Testing Machine ◽

Acrylonitrile Butadiene Styrene ◽

Dynamic Mechanical Properties ◽

Dynamic Mechanical ◽

Glass Fiber Reinforced ◽

Long Glass Fiber

AbstractA series of long glass fiber-reinforced thermoplastic polyurethane (TPU) elastomers and acrylonitrile-butadiene-styrene (ABS) copolymer (LGF/TPU/ABS) composites were prepared using self-designed impregnation device. Poly(styrene-co-maleic anhydride) was employed to increase the compatibility between glass fiber and matrix resin and thus obtain the excellent properties of composites. The dynamic mechanical properties of the composites have been investigated using dynamic mechanical thermal analysis. The results indicated that the storage modulus of the composites gradually increases and then decreases with increasing compatibilizer content. In addition, the low temperature peak of the composites shifts to higher temperature with increasing compatibilizer content. The thermal properties of the composites were studied by thermogravimetric analyzer. In addition, the morphology and mechanical properties of the composites are investigated by scanning electron microscopy, a universal testing machine, and a ZBC-4 Impact Pendulum.

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