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公开(公告)号:US20110294960A1
公开(公告)日:2011-12-01
申请号:US13115796
申请日:2011-05-25
申请人: Marc A. Hillmyer , Grayce C. Theryo , Louis M. Pitet , Feng Jing
发明人: Marc A. Hillmyer , Grayce C. Theryo , Louis M. Pitet , Feng Jing
IPC分类号: C08F279/00
CPC分类号: C08G61/08 , C08G63/08 , C08G2261/3323 , C08G2261/3324 , C08G2261/74
摘要: A polylactide copolymer comprises a graft copolymer of a hydrophobic backbone polymer having a plurality of pendant hydroxyl groups and lactide. In one example, a polylactide includes a graft copolymer of a poly(1,5-cyclooctadiene-co5-norbornene-2-methanol) copolymer and lactide. A method of preparing a toughened polylactide comprises forming a hydrophobic backbone copolymer having a plurality of pendant hydroxyl groups and forming a polylactide graft copolymer by reacting the hydrophobic backbone copolymer having a plurality of pendant hydroxyl groups with lactide, wherein polymerized lactide stems from at least one of the plurality of pendant hydroxyl groups. In one example, a method comprises forming poly(1,5-cyclooctadiene-co-5-norbornene-2-menthanol) by reacting 1,5-cyclooctadiene and 5-norbornene-2-methanol in the presence of a 2nd generation Grubbs' catalyst and cis-1,4-diacetoxy-2-butene as a chain transfer agent and forming poly(1,5-cyclooctadiene-co-5-norbornene-2-methanol-graft-lactide) by reacting the poly(1,5-cyclooctadiene-co-5-norbornene-2-menthanol) as a macroinitiator with lactide in the presence of tin 2-ethylhexanoate and toluene or in the presence of 1,5,7-triazabicyclo[4.4.0]dec-5-ene and dichloromethane.
摘要翻译: 聚丙交酯共聚物包含具有多个侧基羟基的疏水骨架聚合物和丙交酯的接枝共聚物。 在一个实例中,聚交酯包括聚(1,5-环辛二烯-co5-降冰片烯-2-甲醇)共聚物和丙交酯的接枝共聚物。 制备增韧的聚丙交酯的方法包括通过使具有多个侧基羟基的疏水性主链共聚物与丙交酯反应形成具有多个侧羟基的疏水骨架共聚物并形成聚交酯接枝共聚物,其中聚合的丙交酯源自至少一个 的多个侧基羟基。 在一个实例中,一种方法包括在第二代格鲁布斯(Grubbs)的存在下,使1,5-环辛二烯和5-降冰片烯-2-甲醇反应形成聚(1,5-环辛二烯 - 共-5-降冰片烯-2-甲醇) 催化剂和顺式-1,4-二乙酰氧基-2-丁烯作为链转移剂,并通过使聚(1,5-环辛二烯 - 共-5-降冰片烯-2-甲醇 - 接枝丙交酯) - 环辛二烯 - 共-5-降冰片烯-2-薄荷醇)作为大分子引发剂,在2-乙基己酸锡和甲苯存在下,或在1,5,7-三氮杂双环[4.4.0]癸-5-烯 和二氯甲烷。