Block copolymer composition, production method therefor, and film
a copolymer and film technology, applied in the field of block copolymer composition, can solve the problems of film breakage, impaired mechanical properties, etc., and achieve the effects of preventing the formation of holes, high modulus of elasticity, and low tension
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example 1
(1) Production of Block Copolymer Composition
[0159]A pressure-resistant reactor was charged with 23.3 kg of cyclohexane, 1.6 mmol of N,N,N′,N′-tetramethylethylenediamine (hereinafter referred to as “TMEDA”), and 0.91 kg of styrene. 104.4 mmol of n-butyllithium (1.6 M solution) was added to the mixture while stirring the mixture at 40° C. After the addition, the mixture was heated to 50° C. to effect a polymerization reaction for 1 hour. The polymerization conversion ratio of styrene was 100 wt %.
[0160]5.20 kg of isoprene was continuously added to the reactor over 1 hour while maintaining the temperature of the mixture at 50 to 60° C. After the addition, a polymerization reaction was effected for a further 1 hour. The polymerization conversion ratio of isoprene was 100%.
[0161]0.91 kg of styrene was continuously added to the reactor over 1 hour while maintaining the temperature of the mixture at 50 to 60° C. After the addition, a polymerization reaction was effected for a further 1 ho...
examples 2 and 3
[0179]A block copolymer composition was produced in the same manner as in Example 1, except that the amounts of styrene, n-butyllithium, TMEDA, isoprene, and methanol were changed as shown in Table 1, and pellets and a film were prepared using the block copolymer composition.
[0180]The properties of the block copolymer composition, the pellets, and the film were measured in the same manner as in Example 1. The results are shown in Table 2.
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