《Table 1 Molecular characteristics and properties of the butene-1 homopolymer and random copolymers》

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《Effect of Linear and Ring-like Co-units on the Temperature Dependence of Nucleation and Growth in Ⅱ-Ⅰ Phase Transition of Butene-1 Copolymers》

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a BE4.3 and MCP2.15 do not crystallize during cooling at-10°C/min，but they exhibit cold crystallization during the subsequent heating process.For BE4.3and MCP2.15，the crystallization temperatures given in Table 1 correspond to the peak temperature of co

The materials studied in present work include a polybutane-1（PB-1）homopolymer and two series of butene-1 random copolymers，which are butene-1/ethylene（BE）and butene-1/1，5-hexadiene random copolymers.The homopolymer and two butene-1/1，5-hexadiene random copolymers with0.65 mol%and 2.15 mol%methylene-1，3-cyclopentane（MCP）co-units，were synthesized using dimethylpyridylamidohafnium catalyst，which has been described before[22，24].The two butene-1/ethylene random copolymers with 1.5 mol%and 4.3 mol%ethylene co-units were provided by Lyondell Basell Industries，which have grade names of PB8640 and PB8220，respectively.For all polymers studied，detailed molecular characteristics and physical properties are summarized in Table 1.