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Effect of magnesium malonate on the formation of the β crystalline form in isotactic polypropylene
Author(s) -
Dou Qiang,
Lu QuLiang
Publication year - 2008
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.20157
Subject(s) - tacticity , materials science , ultimate tensile strength , differential scanning calorimetry , composite material , polypropylene , izod impact strength test , malonate , flexural strength , nucleation , modulus , flexural modulus , magnesium , polymer , polymerization , metallurgy , organic chemistry , chemistry , physics , thermodynamics
Magnesium malonate (MgMt) is used to induce the β crystalline form in isotactic polypropylene (iPP) for the first time. It is shown by wide angle X‐ray diffraction, differential scanning calorimetry, and polarized light microscopy that the content of the β crystalline form increases markedly with the addition of MgMt and attains the maximum value at an MgMt content of 0.10wt%. The tensile strength and flexural modulus of the doped iPP sample decrease somewhat; the tensile strain at break increases slightly; and the Izod notched impact strength increases significantly with the addition of MgMt, as compared with the values for the blank iPP sample. The β‐nucleation mechanism of MgMt is analyzed by the dimensional lattice match criterion. J. VINYL ADDIT. TECHNOL., 2008. © 2008 Society of Plastics Engineers.