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The role of m ‐phenylenebismaleimide (BMI) in reactive processing of poly(propylene)/magnesium hydroxide composites, 3. Analysis of interphase structure development
Author(s) -
Liauw Christopher Mark,
Khunová Viera,
Lees Graham Charles,
Rothon Roger Norman
Publication year - 2000
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20000601)279:1<34::aid-mame34>3.0.co;2-f
Subject(s) - materials science , crystallinity , composite material , magnesium , composite number , toughness , hydroxide , amide , lubricant , chemical engineering , organic chemistry , chemistry , engineering , metallurgy
In the first and second parts of this series, the effect of m ‐phenylenebismaleimide (BMI), processing temperature and a lubricant (a fatty acid ester/amide blend) on the mechanical and rheological properties of poly(propylene) (PP)/magnesium hydroxide composites was investigated. The third part focuses on interactions between BMI and the magnesium hydroxide and between the BMI and PP matrix. It has been shown that interaction between BMI and the filler is via an amide carboxylate together with possible polymerisation at the filler surface. Interaction of BMI with the PP matrix is via addition of PP macro‐radicals, produced via thermo‐mechanical degradation, to the maleimide alkenes of BMI. Greater crosslink density in the interphase region than in the bulk matrix is considered to result in a reduction of crystallinity within this region. This is manifested as a significant improvement in composite toughness relative to the equivalent unmodified composite.