Copolymerization of 4-methyl-1-pentene with α,ω-alkenols

Abstract

Abstract. Copolymerization of 4-methyl-1-pentene (4M1P) with 9-decen-1-ol (9D1O) or 4-penten-1-ol (4P1O) was conducted by using metallocene catalysts. The activity could be improved under the higher polymerization temperature. The dyad distribution of poly(4M1P-co-4P1O) was presented. The results showed that 4P1O was uniformly distributed in the copolymer chain. The melting temperature (T m ) of the copolymer was lower than that of poly(4M1P), and was decreased with the increase of the incorporation of comonomer. T m of poly(4M1P-co-4P1O) was determined as 185°C, even the incorporation of 4P1O was high as 15.0 mol%. WAXD (wide-angle X-ray diffraction) results showed that the poly(4M1P) was observed as crystalline form II, and turned to form I when the incorporation of α,ω-alkenols were high. Some new peaks, which were never observed in the previous researches, appeared in the X-ray diffraction profiles for poly(4M1P-co-4P1O). It is inferred that the similar chain length of 4P1O and 4M1P may be the key factor.

Integrated Effect of Comonomer and Catalyst on Copolymerization of Ethylene with Allylcyclopentane or Allylcyclohexane by Using Metallocene Catalysts

“…Previously, we studied the comonomer effects for olefin copolymerization by using metallocene and half‐metallocene catalyst systems. We concluded that the structure of the comonomer strongly influenced the polymerization activity and the microstructure of the resulted polymer . In the copolymerization of ethylene with α,ω‐alkenols, the length of the alkenol monomer strongly impacts on the microstructure of the copolymer.…”

“…Alkenol with fewer methylene spacers trends to give the copolymer with more successive comonomer segments, at the same time, the structure of the copolymer obtained from the alkenol with the more methylene spacers is more random . Especially, we realized that the length and the structure of the comonomer give an important impact on the melting point and the stereoregularity of the polymer . Thus, we will explore more novel comonomers for copolymerization, intending to get new polymer with new chemical composition, and enrich the investigation of the comonomer effect.…”

“…We concluded that the structure of the comonomer strongly influenced the polymerization activity and the microstructure of the resulted polymer. [14,[24][25][26] In the copolymerization of ethylene with α,ω-alkenols, the length of the alkenol monomer strongly impacts on the microstructure of the copolymer. Alkenol with fewer methylene spacers trends to give the copolymer with more successive comonomer segments, at the same time, the structure of the copolymer obtained from the alkenol with the more methylene spacers is more random.…”

“…[14,24] Especially, we realized that the length and the structure of the comonomer give an important impact on the melting point and the stereoregularity of the polymer. [25,26] Thus, we will explore more novel comonomers for copolymerization, intending to get new polymer with new chemical composition, and enrich the investigation of the comonomer effect.…”

Polymerization of Allyltrimethylisilane and 4-Methyl-1-Pentene by Using Metallocene Catalysts

“…For example, in ECMO, which is used to treat severe COVID-19 patients, the hollow fibers of the oxygenator are made of PMP [12]. As a result, the (co)polymerization of 4-methyl-1-pentene (4M1P) has been extensively studied [13][14][15][16]. The isospecific polymerization of 4M1P can be carried out through the coordination polymerization of Cr-, V-, Ti-, and Zr-based catalysts, of which the titanium catalyst is the most commonly used [13].…”