Studies of the microstructure of ethylene/1-hexene copolymers prepared over heterogeneous Ziegler-Natta catalysts

• Autorzy: Czaja K. , Białek M.

Warianty tytułu

PL

Badania mikrostruktury kopolimerów etylen/1-heksen otrzymywanych na heterogenicznych katalizatorach Zieglera-Natty

• Konferencja: VII International Seminar on Organometallic Complexes as Catalyst of Vinyl Compounds Polymerization (Turawa k/Opola; 1999)
• Języki publikacji: EN

Abstrakty

EN

Three MgCl2(THF)2-supported, AlEt2Cl-activated VOCl3, VCl4 and TiCl4 Ziegler–Natta catalysts were used to copolymerize ethylene with 1-hexene in the presence of hydrogen to prepare low-M well-soluble copolymers that could be analyzed by 13C-NMR. The spectra (Fig. 1) showed resonance signals due to ethylene and 1-hexene units in positions unaffected by catalyst type and with intensities related to the degree of comonomer incorporation into the copolymer. The triad sequence distribution and comonomer reactivity ratios (r) were calculated by the Randall method [11] and Bernoulli statistics based on the known copolymer composition. The latter appeared to be the more valid in predicting the comonomer triad distribution in the copolymer. All copolymers were found to be random (rErH = 1) (Tables 4, 5). Compared with titanium, vanadium catalysts provided the higher monomer reactivity of ethylene toward alpha-olefin.

Słowa kluczowe

EN

ethylene/1-hexene copolymers; microstructure; reactivity coefficients

PL

kopolimery etylen/1-heksen; katalizatory tytanowe i wanadowe na nośniku magnezowym; mikrostruktura; współczynnik reaktywności

• Wydawca: Sieć Badawcza Łukasiewicz – Instytut Chemii Przemysłowej
• Czasopismo: Polimery
• Rocznik: 2000
• Tom: T. 45, nr 5
• Strony: 353--357

Twórcy

autor

Czaja K.

autor

Białek M.

• University of Opole, Institute of Chemistry, Oleska 48, 45-052 Opole, Poland