Polyurethane thermoplastic elastomer modified by amino POSS and preparation method of thermoplastic elastomer
A thermoplastic elastomer and polyurethane technology, applied in the field of amino-POSS modified polyurethane thermoplastic elastomer and its preparation, can solve the problems of poor compatibility between POSS and polyurethane, unfavorable long-life use of materials, low dielectric constant, etc. The effect of improving surface hydrophobicity, improving elongation at break, increasing tensile strength and elongation at break
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Embodiment 1
[0036] First weigh each component by the following parts by weight:
[0037] Amino POSS: 1 part;
[0038] Isophorone diisocyanate: 50 parts;
[0039] Polytetrahydrofuran: 30 parts;
[0040] Dibutyltin dilaurate: 0.1 part;
[0041] Acetone: 100 parts;
[0042] Then in high purity N 2 Under protection, dissolve the water-removing polytetrahydrofuran PTMG in dry acetone, stir well, add the catalyst dibutyltin dilaurate and heat to a slight boil.
[0043] Then slowly add isophorone diisocyanate IPDI, reflux reaction for 3 hours, add amino POSS, continue to react for 1 hour and then stop heating;
[0044] The resulting emulsion was left to stand at room temperature until there were no obvious bubbles, then slowly poured into a polytetrafluoroethylene mold, and left to stand at room temperature for 1 day to obtain the amino POSS-modified polyurethane thermoplastic elastomer material.
Embodiment 2
[0046] First weigh each component by the following parts by weight:
[0047] Amino POSS: 4 parts;
[0048] Isophorone diisocyanate: 50 parts;
[0049] Polytetrahydrofuran: 30 parts;
[0050] Dibutyltin dilaurate: 0.1 part;
[0051] Acetone: 105 parts;
[0052] Then in high purity N 2 Under protection, dissolve the water-removing polytetrahydrofuran PTMG in dry acetone, stir well, add the catalyst dibutyltin dilaurate and heat to a slight boil;
[0053] Then slowly add isophorone diisocyanate IPDI, reflux reaction for 4 hours, add amino POSS, continue to react for 1 hour, then stop heating;
[0054] The resulting emulsion was left to stand at room temperature until there were no obvious bubbles, then slowly poured into a polytetrafluoroethylene mold, and left to stand at room temperature for 1 day to obtain the amino POSS-modified polyurethane thermoplastic elastomer material.
Embodiment 3
[0056] First weigh each component by the following parts by weight:
[0057] Amino POSS: 7 parts;
[0058] Isophorone diisocyanate: 50 parts;
[0059] Polytetrahydrofuran: 40 parts;
[0060] Dibutyltin dilaurate: 0.1 part;
[0061] Acetone: 110 parts;
[0062] Then in high purity N 2 Under protection, dissolve the water-removing polytetrahydrofuran PTMG in dry acetone, stir well, add the catalyst dibutyltin dilaurate and heat to a slight boil;
[0063] Then slowly add isophorone diisocyanate IPDI, reflux reaction for 5 hours, add amino POSS, continue to react for 1 hour and stop heating;
[0064] The resulting emulsion was left to stand at room temperature until there were no obvious bubbles, then slowly poured into a polytetrafluoroethylene mold, and left to stand at room temperature for 1 day to obtain the amino POSS-modified polyurethane thermoplastic elastomer material.
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