Reinforcement of the thermal stability and mechanical properties of low-density polyethylene/high-density polyethylene foam using a modified calcium sulfate whisker

Xu, Jie; Zhong, Jinfu; Fu, Dongliang; Li, Guangfu; Liu, Xiangdong

doi:10.1039/d3nj01152f

New J. Chem.

2023

DOI: 10.1039/d3nj01152f

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Reinforcement of the thermal stability and mechanical properties of low-density polyethylene/high-density polyethylene foam using a modified calcium sulfate whisker

Jie Xu,

Jinfu Zhong,

Dongliang Fu

et al.

Abstract: Radiation cross-linked low-density polyethylene (LDPE)/high-density polyethylene (HDPE) foams containing 30wt% high-density polyethylene (HDPE) were further modified with different weight ratios (0, 4, 8, 12, and 16wt%) of modified calcium sulfate...

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2024

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Cited by 2 publications

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Heterogeneous nucleation of calcium sulfate whisker in polyamide 6 and its efficient reinforcement on tribology performance

Sun,

Ye,

Cai

2024

Polymer Composites

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For traditional materials, a polymer composite with high performance and large‐scale production is still the goal pursued by researchers. In our work, polyamide 6/calcium sulfate whiskers (PA6/SCW) composites were fabricated via melt‐compouding method. The calcium sulfate whisker based on gypsum mineral was used as reinforcement. After grafting silane coupling agent on the whisker surface, the whiskers showed a significant reinforcing effect in polyamide. The mechanics and tribology performance of the samples had been significantly inhanced. Based on the nucleation mechanism of lattice matching, calcium sulfate whiskers have obvious heterogeneous nucleation effect in PA6 matrix, while the crystallization period was slightly prolonged. This was caused by the network structure formed by the whiskers in the matrix, which impeded the free movement of polymer chain segments. In combination with the orientation degree of the molecular chains measured by the interdigital electrode, the reinforcing effect of the oriented PA6 specimens was derived from the orientation arrangement of the whiskers and the efficient load transfer.Highlights Mechanical and tribological properties of composite were significantly improved. The composite could achieved large‐scale production due to simple preparation. The whiskers had obvious heterogeneous nucleation effect in matrix. The reinforcing effect was derived from efficient load transfer from whiskers.

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Heterogeneous nucleation of calcium sulfate whisker in polyamide 6 and its efficient reinforcement on tribology performance

Sun,

Ye,

Cai

2024

Polymer Composites

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Preparation of phthalonitrile resin/calcium sulfate whisker composites with enhanced wear and heat resistance

Li,

Zhao,

Jia

et al. 2024

High Performance Polymers

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Composites based on high-performance resin matrix have excellent high temperature resistance, chemical stability, and excellent processability, and exhibit a wide range of applications in many fields. At present, there are no reports on the application of calcium sulfate whiskers (CSW) in phthalonitrile resins. In this study, KH560 was used to modify CSW, through FT-IR, TGA, XRD and XPS methods, KH560 was successfully grafted onto CSW, and the modified CSW was filled with phthalonitrile resin containing fluorine elements. SEM shows that the modified CSW is uniformly dispersed in the resin. The storage modulus of composites increased from 2.6 GPa to 3.8 GPa. Under air and nitrogen atmospheres, the T5% of the composites increased by about 10°C. When the addition amount of CSW is 10%, the friction coefficient of the material is reduced from 0.68 to 0.58, the depth of wear marks decreased from 49.1 μm to 27.9 μm, the wear rate of AFPN-10 (the addition amount of CSW is 10%) decreases from 3.59 × 10−4 mm3/(N·m) to 2.70 × 10−4 mm3/(N·m), the wear resistance performance was significantly improved. With the increase of CSW in composites, the hardness, reduced modulus and elastic recovery rate are also gradually increasing, the highest reduced modulus and hardness are 2434 MPa and 597 MPa respectively. The addition of CSW can improve the mechanical properties and thermal properties of the phthalonitrile resin, as well as enhance its anti-friction ability. Phthalonitrile resin-based composites have potential application values in the fields of aerospace, electronic instruments and lightweight components.

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Reinforcement of the thermal stability and mechanical properties of low-density polyethylene/high-density polyethylene foam using a modified calcium sulfate whisker

Abstract: Radiation cross-linked low-density polyethylene (LDPE)/high-density polyethylene (HDPE) foams containing 30wt% high-density polyethylene (HDPE) were further modified with different weight ratios (0, 4, 8, 12, and 16wt%) of modified calcium sulfate...

Cited by 2 publications

References 48 publications

Heterogeneous nucleation of calcium sulfate whisker in polyamide 6 and its efficient reinforcement on tribology performance

Heterogeneous nucleation of calcium sulfate whisker in polyamide 6 and its efficient reinforcement on tribology performance

Preparation of phthalonitrile resin/calcium sulfate whisker composites with enhanced wear and heat resistance

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