Simultaneously enhancing fire retardancy, acid and alkali resistance of polypropylene/aluminum trihydrate composite by microencapsulated red phosphorus

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Journal of Vinyl & Additive Technology Pub Date : 2024-09-25 DOI:10.1002/vnl.22165

Wuhui Li, Jiaqi Li, Haoqi Xing, Kang Wang, Yunqi Zhang, Jichun Liu

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引用次数: 0

Abstract

The two obvious drawbacks of aluminum trihydrate (ATH) as a flame retardant to polymers are its low efficiency and poor resistance to both acid and alkali. To overcome these faults, ATH-filled fire-retarded polypropylene (PP) was modified by microencapsulated red phosphorus (MRP) and the flammability, acid and alkali resistance of the obtained PP/ATH/MRP composite were investigated. Results reveal that addition of 63 wt% ATH cannot impart V-0 rating to PP in UL-94 test, but incorporating 50 wt% ATH/MRP composite flame retardant can endow PP with V-0 rating. ATH synergizes notably with MRP in enhancing fire retardancy of PP and the presence of suitable MRP can boost acid and alkali resistance of PP/ATH composite remarkably. The production of high-quality char layer upon combustion is the key reason for improvement of fire retardance. MRP-induced charring of PP is responsible for the heightened acid and alkali resistance of PP/ATH composite. This work offers a simple and cheap route to overcome the drawbacks of ATH and will expand the application field of flame-retarded polymers with ATH.

Highlights

MRP synergizes notably with ATH in flame-retarding PP.
Formation of high-quality char layer answers for improved fire retardance.
Presence of MRP enhances chemical resistance of PP/ATH composite considerably.
MRP-induced charring of PP is the root cause for enhanced chemical resistance.

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.