A kind of high-functionality hydroxyl-terminated polybutadiene and its preparation method
A hydroxyl-terminated polybutadiene and high-functionality technology, which is applied in the field of high-functionality hydroxyl-terminated polybutadiene and its preparation, can solve problems such as insufficient functionality, reduce molecular weight distribution, reduce production costs, and reduce reaction the effect of time
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Embodiment 1
[0048] The preparation process of the high-functionality hydroxyl-terminated polybutadiene of the present embodiment is as follows:
[0049] (1) Preparation of lithium naphthalene initiator: use cyclohexane and tetrahydrofuran to cooperate as a solvent, naphthalene and lithium metal generate a lithium naphthalene initiator under the protection of an argon atmosphere under ice-water bath conditions, and the lithium naphthalene initiator is subjected to suction filtration to obtain clarification After the liquid, it reacts with isoprene to obtain short-chain active species.
[0050] The volume ratio of cyclohexane to tetrahydrofuran was 3:1. Under the protection of argon atmosphere, the 10g lithium rod was quickly peeled off the surface oxide film, and then the scissors were used to cut it into lithium scraps. Weigh the measured naphthalene in a ratio of 1, add it into the there-necked flask, add the tetrahydrofuran that is now steamed and used under the ice-water bath conditio...
Embodiment 2
[0057] The preparation process of the high-functionality hydroxyl-terminated polybutadiene of the present embodiment is as follows:
[0058] (1) Preparation of lithium naphthalene initiator: use cyclohexane and tetrahydrofuran to cooperate as a solvent, naphthalene and lithium metal generate a lithium naphthalene initiator under the protection of an argon atmosphere under ice-water bath conditions, and the lithium naphthalene initiator is subjected to suction filtration to obtain clarification After the liquid, it reacts with isoprene to obtain short-chain active species.
[0059] The volume ratio of cyclohexane to tetrahydrofuran was 3:1. Under the protection of argon atmosphere, the 10g lithium rod was quickly peeled off the surface oxide film, and then the scissors were used to cut it into lithium scraps. Weigh the measured naphthalene in a ratio of 1, add it into the there-necked flask, add the tetrahydrofuran that is now steamed and used under the ice-water bath conditio...
Embodiment 3
[0066] The preparation process of the high-functionality hydroxyl-terminated polybutadiene of the present embodiment is as follows:
[0067] (1) Preparation of lithium naphthalene initiator: use cyclohexane and tetrahydrofuran to cooperate as a solvent, naphthalene and lithium metal generate a lithium naphthalene initiator under the protection of an argon atmosphere under ice-water bath conditions, and the lithium naphthalene initiator is subjected to suction filtration to obtain clarification After the liquid, it reacts with isoprene to obtain short-chain active species.
[0068]The volume ratio of cyclohexane to tetrahydrofuran was 3:1. Under the protection of argon atmosphere, the 10g lithium rod was quickly peeled off the surface oxide film, and then the scissors were used to cut it into lithium scraps. Weigh the measured naphthalene in a ratio of 1, add it into the there-necked flask, add the tetrahydrofuran that is now steamed and used under the ice-water bath condition...
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Abstract
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