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树脂包覆率对微胶囊包覆聚磷酸铵阻燃聚乳酸性能的影响
赵雅文,陆冲,程树军
0
(华东理工大学材料科学与工程学院, 上海 200237)
摘要:
通过原位聚合法,以密胺树脂(MF)为壁材,制备了微胶囊包覆聚磷酸铵(MCAPP),然后密炼将MCAPP与聚乳酸(PLA)熔融共混,得到微胶囊包覆聚磷酸铵阻燃聚乳酸,并研究了不同树脂包覆率的MCAPP对共混物形貌结构、加工性能、热性能、力学性能以及阻燃性能的影响。结果表明,在原位聚合过程中,当MF质量分数为17.2%时,MCAPP树脂包覆率可达13.2%,共混物中PLA结晶度提高,降解程度最低,同时阻燃效果最佳,极限氧指数可达39.4%,并且垂直燃烧等级达到UL94 V0级。
关键词:  聚乳酸  原位聚合  密胺树脂  微胶囊  聚磷酸铵  阻燃
DOI:10.14135/j.cnki.1006-3080.2017.02.007
投稿时间:2016-07-15
基金项目:
Effect of Resin Encapsulation Ratio on Properties of Microencapsulated Ammonium Polyphosphate and Polylactide Flame Retardant Blends
ZHAO Ya-wen,LU Chong,CHENG Shu-jun
(School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China)
Abstract:
Microencapsulated ammonium polyphosphate(MCAPP) was synthesized by in-situ polymerization with melamine-formaldehyde (MF) resin as wall material.The MCAPP and polylactide(PLA) flame retardant blends were prepared via internal mixing.The effect of different MCAPP encapsulation ratios on the morphology,processability,thermal properties,mechanical properties and flame retardancy of the blends were studied.When the mass fraction of MF resin addition is 17.2% in the in-situ polymerization,the blend's MCAPP encapsulation ratio reaches 13.2%.This blend has the best flame retardant effect,the lowest degree of degradation and an increased degree of crystallinity of PLA.LOI value of this blend is 39.4% and the UL-94 rating is raised to V0 level.
Key words:  polylactide  in-situ polymerization  melamine-formaldehyde resin  microencapsulation  ammonium polyphosphate  flame retardant

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