Simultaneous improvement of processability and toughness of highly filled MH/LLDPE composites by using fluorine-containing flow modifiers

Cao, Bo; Zhou, Yubin; Wu, Yancheng; Cai, Jianan; Guan, Xiaoxiao; Liu, Shumei; Zhao, Jianqing; Zhang, Mingqiu

doi:10.1016/j.compositesa.2020.105900

Cited by 19 publications

(28 citation statements)

References 42 publications

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“…The polar maleic anhydride part can interact readily with the inorganic fillers through their functional groups, while the long hydrocarbon chains of the PE part can interact with the LDPE matrix through the formation of van der Waals interactions and physical entanglements. Thus, a permanent connection is succeeded between the inorganic flame retardant additives and the matrix 57,58 …”

Section: Resultsmentioning

confidence: 99%

“…Moreover, when metal hydroxides are combined with other flame retardants, these secondary flame retardants are often incompatible with the polymer matrix and are insufficient to improve the interfacial structure of metal hydroxides, leading to deterioration in composite properties. 46,56,57 As seen in section 3.1, in highly flame retardant loaded LDPE composites, the homogeneity of the additive dispersion in the LDPE matrix directly affected the thermal, mechanical and flame retardancy properties depending on the MH and MC ratio. Therefore, providing better compatibility of the flame retardant additives with the polymer matrix may be a favorable approach to improve these properties further.…”

Section: The Effect Of Compatibilizermentioning

confidence: 99%

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Improvement of flame retardancy and thermal stability of highly loaded low density polyethylene/magnesium hydroxide composites

Yücesoy,

Balçik Tamer,

Berber

2023

J of Applied Polymer Sci

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This study aims to enhance the flame retardant efficiency and thermal stability of low density polyethylene (LDPE) by using halogen‐free inorganic additives. To prepare the highly loaded flame retardant polymer composites, LDPE melt mixes with magnesium hydroxide and magnesium carbonate at different weight ratios using a twin‐screw extruder. The composites are characterized by thermogravimetric analysis, crystallinity degree, tensile strength, morphological analysis, limiting oxygen index and UL‐94 vertical burning test. An optimum MH/MC weight ratio of 60/40 provides satisfactory composite properties with increased maximum thermal degradation temperature from 472.3 to 483.5°C, the highest LOI value of 32.5% and a UL‐94 V‐0 rating without melt dripping. The homogeneity of this composite is improved by using a polymeric compatibilizer, MAH‐g‐PE and an enhancement in tensile strength, elongation at break and elastic modulus values of 33.68%, 33.02% and 23.55%, respectively, are obtained. In order to create synergism between the flame retardant additives, 1, 3 and 5 wt% zinc borate is added to the composite system. The incorporation of 5 wt% ZB causes a significant delay in the thermal decomposition of MH with an improvement of 51.8°C in maximum degradation temperature. This composite also exhibits a satisfactory flame retardant grade with a UL‐94 V‐0 rating.

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Section: Resultsmentioning

confidence: 99%

Section: The Effect Of Compatibilizermentioning

confidence: 99%

Improvement of flame retardancy and thermal stability of highly loaded low density polyethylene/magnesium hydroxide composites

Yücesoy,

Balçik Tamer,

Berber

2023

J of Applied Polymer Sci

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“…Because of its good processability, PE plays an important role in the field of polymer materials. [1,2] The varieties of PE include low-density polyethylene (LDPE), highdensity polyethylene (HDPE), linear low-density polyethylene (LLDPE), and other major series of products. Among various types of PE, LDPE possesses low crystallinity, and flexible texture, which is mainly used for the preparation of PE film.…”

Section: Introductionmentioning

confidence: 99%

A novel phytic acid based flame retardant to improve flame retardancy, hydrophobicity and mechanical properties of linear low‐density polyethylene

Feng

Wang

et al. 2023

Vinyl Additive Technology

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Exploiting high phosphorus content of phytic acid, it was grafted onto magnesium hydroxide (MH) by neutralization reaction to obtain MGPA, a flame retardant. A current study investigated the effect of MGPA on hydrophobicity, flame retardancy, and mechanical properties of MGPA-linear lowdensity polyethylene (LLDPE) composites. The LLDPE composite with 50 parts of MGPA has the better flame retardancy and thermal stability with a limiting oxygen index of 23.3%, which is higher than that of neat LLDPE (17%). In addition, MGPA could effectively promoted LLDPE to form a continuous and compact char residue during combustion, which reduce the peak of heat release rate and total smoke production value of LLDPE composite by 70% and 36%, respectively, and the char residue rate increase to 67.5%. Furthermore, the maximum of loss-rate showed by LLDPE composite with MGPA reduce to 1.25%/min while the value of LLDPE composite with MH is 1.8%/min. Meanwhile, the LLDPE composite with MGPA show remarkable elongation at break and hydrophobicity, which are 398% and 99 , respectively. In addition, this study presents a substantial flame retardancy and interfacial compatibility of MGPA for extending the applications of flame-retardant LLDPE composites.

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“…Now, physical blending and chemical modification are common routes to enhance the mechanical properties and the biocompatibility of polymer materials. − Cao et al proposed a strategy for improving the toughness of linear low-density polyethylene by filling magnesium hydroxide . The elongation at break of PLA increased from 4.24 to 8.79% by adding hydroxyapatite (HA) nanorods as reported by Zhang et al However, physical blending inevitably leads to inhomogeneity and incompatibility, resulting in a limited improvement effect.…”

Section: Introductionmentioning

confidence: 99%

A Novel Stereocomplex Poly(lactic acid) with Shish-Kebab Crystals and Bionic Surface Structures as Bioimplant Materials for Tissue Engineering Applications

Fan

et al. 2021

ACS Appl. Mater. Interfaces

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The development of green material possessing with great mechanical properties and biocompatibility has become a primary goal for high-performance biological material applications. Herein, the oriented shish-kebab crystals of stereocomplex poly(lactic acid) (SC-PLA) are first reported to be successfully fabricated through a feasible solid-state drawing (SSD) process to simultaneously enhance the mechanical performance and biocompatibility. The resultant biomaterial exhibits a tensile strength of 373 MPa and elongation about 9%, with elastic modulus about 8.1 GPa. Such an outstanding toughening effect is due to an amalgamation of enhanced crystallinity of epitaxial secondary growth lamellae and orientation degree of the fibrous backbone of the SC-PLA samples, both gradually increasing with the draw ratio of SSD increasing. Uniquely distinguished from the typical biomedical polymer with the smooth surface structure, the as-obtained SC-PLA samples possess a surface morphology of parallel microgrooves within ridge structures, attributing to the highly oriented fibrous backbone structure complemented with regularly arranged epitaxial lamellas. This unique trait well represents the human vascular endothelial microstructure that is desirable for cell adhesion-growth to extend its proliferation, differentiation, and activity on the surface of SC-PLA.

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Simultaneous improvement of processability and toughness of highly filled MH/LLDPE composites by using fluorine-containing flow modifiers

Cited by 19 publications

References 42 publications

Improvement of flame retardancy and thermal stability of highly loaded low density polyethylene/magnesium hydroxide composites

Improvement of flame retardancy and thermal stability of highly loaded low density polyethylene/magnesium hydroxide composites

A novel phytic acid based flame retardant to improve flame retardancy, hydrophobicity and mechanical properties of linear low‐density polyethylene

A Novel Stereocomplex Poly(lactic acid) with Shish-Kebab Crystals and Bionic Surface Structures as Bioimplant Materials for Tissue Engineering Applications

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