4.7 Article

Preparation of a novel oligomer type compatibilizer for polypropylene/polystyrene blend

期刊

REACTIVE & FUNCTIONAL POLYMERS
卷 169, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.reactfunctpolym.2021.105090

关键词

Polypropylene; Polystyrene; Compatibilizer; Polymer blend

资金

  1. Japan Society for the Promotion of Science [20K05587]
  2. 9th Long-range Research Initiative
  3. Japan Chemical Industry [19_D08-01]
  4. ADEKA Co.
  5. Grants-in-Aid for Scientific Research [20K05587] Funding Source: KAKEN

向作者/读者索取更多资源

A PS-g-TEMPO copolymer was formed during thermal-oxidative degradation of PS/HALS, with the optimal preparation condition identified at 150°C for 21 hours. The copolymer was then reacted with PP to produce a PS-g-PP grafted copolymer, resulting in significant improvement in mechanical properties and ductile fracture surface when used for reactive polymer blend of PP/PS/PS-g-TEMPO. The addition of HALS loading easily produced an excellent compatibilizer for mechanical improvement in PP/PS.
A polystyrene-g-2,2,6,6-tetramethylpiperidine 1-oxyl radical (PS-g-TEMPO) copolymer was formed during thermal-oxidative degradation of PS/hindered amine light stabilizer (HALS) under heat treatment by thermal equilibrium. The optimum preparation condition was identified at 150 degrees C for 21 h by assessment of the tem-perature and aging time dependences of the molecular weight and thermal properties. The optimized copolymer was reacted with polypropylene (PP). A PS-g-PP grafted copolymer-type compatibilizer was reactively prepared with the copolymer/PP at 200 degrees C melt mixing temperature. The tetrahydrofuran-soluble part of the PP/PS/PS-g-TEMPO blend was analyzed as the PS-g-PP copolymer. The PS-g-PP showed a broad melting peak in the range from 125 degrees C to 160 degrees C. The PP grafting ratio was approximately 4%, as calculated by pyrolysis gas chromatography mass spectrometry (Py-GC/MS) analysis. The reactive polymer blend of the PP/PS/ PS-g-TEMPO showed significant improvement in mechanical properties and ductile fracture surface as compared with PP/PS. The HALS loading easily produced an excellent compatibilizer for PP/PS mechanical improvement.

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