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

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.