Novel Phosphazene-Based Flame Retardant Polyimine Vitrimers with Monomer-Recovery and High Performances

Xinfang Zhang; Yoav Eichen; Zhenwei Miao; Shuangkun Zhang; Qing Cai; Wei Liu; Jingbo Zhao; Zhanpeng Wu

doi:10.1016/j.cej.2022.135806

Novel Phosphazene-Based Flame Retardant Polyimine Vitrimers with Monomer-Recovery and High Performances

Xinfang Zhang, Yoav Eichen^*, Zhenwei Miao, Shuangkun Zhang, Qing Cai, Wei Liu, Jingbo Zhao^*, Zhanpeng Wu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Novel polyimine vitrimers were constructed from cyclophosphazene bearing three aldehyde groups, CP-3AP, terephthalaldehyde, TPA, and diaminodiphenyl methane, MDA. Owing to the incorporation of phosphazene skeleton and high content of aromatic ring structure, the new vitrimers exhibit superior flame retardancy with UL-94 V0 level and high limiting oxygen index, LOI, of ∼ 40%, high thermostability with T5% (5% weight loss) of ∼ 420 °C and ∼ 75% residues at 800 °C. Vitrimers owned high Tg of ca 146 °C, robust tensile strength of ∼ 56 MPa and excellent reprocessability with greater than 90% recycling efficiency of mechanical properties even when subjected to three recycling cycles based on imine dynamic covalent bond. Additionally, possible bond exchange mechanisms that are involved in the processability were systematically researched by model compounds using TOF-mass spectroscopy. CP-3AP could be recovered by acidolysis with high 81% efficiency. Such excellent comprehensive properties of phosphazene based polyimine vitrimers open new routes to a variety of high-performance vitrimers, especially in terms of thermal and flame retardancy properties.

Original language	English
Journal	Chemical Engineering Journal
DOIs	https://doi.org/10.1016/j.cej.2022.135806
State	Published - 15 Jul 2022
Externally published	Yes

Keywords

Phosphazenes
Polyimine vitrimers
Reprocessability
Flame retardancy
Thermostability
Monomer-recovery

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10.1016/j.cej.2022.135806

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@article{f9bab7ce72da475d8c2f28ea95c65c87,

title = "Novel Phosphazene-Based Flame Retardant Polyimine Vitrimers with Monomer-Recovery and High Performances",

abstract = "Novel polyimine vitrimers were constructed from cyclophosphazene bearing three aldehyde groups, CP-3AP, terephthalaldehyde, TPA, and diaminodiphenyl methane, MDA. Owing to the incorporation of phosphazene skeleton and high content of aromatic ring structure, the new vitrimers exhibit superior flame retardancy with UL-94 V0 level and high limiting oxygen index, LOI, of ∼ 40%, high thermostability with T5% (5% weight loss) of ∼ 420 °C and ∼ 75% residues at 800 °C. Vitrimers owned high Tg of ca 146 °C, robust tensile strength of ∼ 56 MPa and excellent reprocessability with greater than 90% recycling efficiency of mechanical properties even when subjected to three recycling cycles based on imine dynamic covalent bond. Additionally, possible bond exchange mechanisms that are involved in the processability were systematically researched by model compounds using TOF-mass spectroscopy. CP-3AP could be recovered by acidolysis with high 81% efficiency. Such excellent comprehensive properties of phosphazene based polyimine vitrimers open new routes to a variety of high-performance vitrimers, especially in terms of thermal and flame retardancy properties.",

keywords = "Phosphazenes, Polyimine vitrimers, Reprocessability, Flame retardancy, Thermostability, Monomer-recovery",

author = "Xinfang Zhang and Yoav Eichen and Zhenwei Miao and Shuangkun Zhang and Qing Cai and Wei Liu and Jingbo Zhao and Zhanpeng Wu",

year = "2022",

month = jul,

day = "15",

doi = "10.1016/j.cej.2022.135806",

language = "英语",

journal = "Chemical Engineering Journal",

issn = "1385-8947",

publisher = "Elsevier",

}

TY - JOUR

T1 - Novel Phosphazene-Based Flame Retardant Polyimine Vitrimers with Monomer-Recovery and High Performances

AU - Zhang, Xinfang

AU - Eichen, Yoav

AU - Miao, Zhenwei

AU - Zhang, Shuangkun

AU - Cai, Qing

AU - Liu, Wei

AU - Zhao, Jingbo

AU - Wu, Zhanpeng

PY - 2022/7/15

Y1 - 2022/7/15

N2 - Novel polyimine vitrimers were constructed from cyclophosphazene bearing three aldehyde groups, CP-3AP, terephthalaldehyde, TPA, and diaminodiphenyl methane, MDA. Owing to the incorporation of phosphazene skeleton and high content of aromatic ring structure, the new vitrimers exhibit superior flame retardancy with UL-94 V0 level and high limiting oxygen index, LOI, of ∼ 40%, high thermostability with T5% (5% weight loss) of ∼ 420 °C and ∼ 75% residues at 800 °C. Vitrimers owned high Tg of ca 146 °C, robust tensile strength of ∼ 56 MPa and excellent reprocessability with greater than 90% recycling efficiency of mechanical properties even when subjected to three recycling cycles based on imine dynamic covalent bond. Additionally, possible bond exchange mechanisms that are involved in the processability were systematically researched by model compounds using TOF-mass spectroscopy. CP-3AP could be recovered by acidolysis with high 81% efficiency. Such excellent comprehensive properties of phosphazene based polyimine vitrimers open new routes to a variety of high-performance vitrimers, especially in terms of thermal and flame retardancy properties.

AB - Novel polyimine vitrimers were constructed from cyclophosphazene bearing three aldehyde groups, CP-3AP, terephthalaldehyde, TPA, and diaminodiphenyl methane, MDA. Owing to the incorporation of phosphazene skeleton and high content of aromatic ring structure, the new vitrimers exhibit superior flame retardancy with UL-94 V0 level and high limiting oxygen index, LOI, of ∼ 40%, high thermostability with T5% (5% weight loss) of ∼ 420 °C and ∼ 75% residues at 800 °C. Vitrimers owned high Tg of ca 146 °C, robust tensile strength of ∼ 56 MPa and excellent reprocessability with greater than 90% recycling efficiency of mechanical properties even when subjected to three recycling cycles based on imine dynamic covalent bond. Additionally, possible bond exchange mechanisms that are involved in the processability were systematically researched by model compounds using TOF-mass spectroscopy. CP-3AP could be recovered by acidolysis with high 81% efficiency. Such excellent comprehensive properties of phosphazene based polyimine vitrimers open new routes to a variety of high-performance vitrimers, especially in terms of thermal and flame retardancy properties.

KW - Phosphazenes

KW - Polyimine vitrimers

KW - Reprocessability

KW - Flame retardancy

KW - Thermostability

KW - Monomer-recovery

U2 - 10.1016/j.cej.2022.135806

DO - 10.1016/j.cej.2022.135806

M3 - 文章

SN - 1385-8947

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Novel Phosphazene-Based Flame Retardant Polyimine Vitrimers with Monomer-Recovery and High Performances

Abstract

Keywords

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