Izvorni znanstveni članak
Synthesis of ethylene-propylene-diene-graft-polystyrene copolymers of various structures
Anita PTIČEK
orcid.org/0000-0001-6243-4638
; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, Zagreb
Zlata HRNJAK- MURGIĆ
orcid.org/0000-0003-4729-5603
; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, Zagreb
Jasenka JELENČIĆ
; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, Zagreb
Mirela LESKOVAC
; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, Zagreb
Marica MLINAC MIŠAK
Sažetak
To study the relationship of different structures on properties, ethylene-propylene-diene-graft-polystyrene (EPDM-g-PS) copolymers, with different graft density were synthesized. For this purpose three different types of EPDM copolymers which differ by concentration of double bonds and propylene were used. The synthesis was carried out at 90 °C in toluene solution using dibenzoyl-peroxide as initiator. Variation of polymerization time was applied to obtain different structures of graft copolymers. Graft copolymers were extracted from mixture of polymers obtained by polymerization. The chain structure of the synthesized graft copolymers was followed by glass transition temperature (Tg), by molecular masses, ( ) and by surface energy. The results of glass transition temperature, of molecular masses and free surface energy show that with extended polymerization time and with various types of main chains of graft copolymers affect the concentration of side branches, which determines the structure and composition of graft copolymer.
Ključne riječi
graft copolymer; EPDM; EPDM-g-PS; PS; structure-properties; synthesis condition
Hrčak ID:
10081
URI
Datum izdavanja:
12.3.2007.
Posjeta: 2.436 *