摘要
以乳酸为原料、辛酸亚锡为催化剂,采用直接熔融缩聚法合成聚乳酸(PLA),将其用IPDI扩链,制得聚合物IPDI/PLA,再用PEG-800改性,制备出IPDI/PLEG-800。用凝胶色谱、傅里叶变换红外光谱、接触角、X射线衍射、热失重、流变学分析等手段对聚合物的结构和性能进行了表征。结果表明:与IPDI/PLA相比,IPDI/PLEG-800分子量大幅度提高,且接触角变小,亲水性能提高;IPDI/PLEG-800具有较高黏弹性;PEG-800的加入使得IPDI/PLA的结晶度提高韧,性增强。
Taking lactic acid as raw material, Sn（Oct）2 as catalyst, homopolymer polylactic acid （PLA） was directly synthesized via melt polycondensation. Then PLA was reacted with IPDI to prepare IPDI/ PLA. Later IPDI/PLA was reacted with PEG-800 to produce IPDI/PLEG-800. The above polymers were characterized by GPC, FTIR, TG, DMA and contact angle testing. The results show that compared with IPDI/PLA, the molecular weight of IPDI/PLEG-800 increases greatly, the contact angle becomes smaller, and the hydrophilicity is improved; the viscous elasticity of IPDI/PLEG-800 is high; the addition of PEG-800 increases the crystalline and improves the toughness of IPDI/PLA.
出处
《塑料科技》
CAS
北大核心
2010年第10期45-49,共5页
Plastics Science and Technology
基金
陕西省科技攻关项目(2008K07-32)
陕西省咸阳市科技计划资助项目(XK07011-2)
陕西科技大学研究生创新基金资助项目
