摘要
采用100%可再生聚三亚甲基醚(PO3G)和聚乙二醇等与1,6-己基二异氰酸酯(HDI)反应合成了不同PO3G含量的聚氨酯(PU)水凝胶。利用傅里叶转变红外光谱(FT-IR)、差示扫描量热(DSC)、动态热机械分析(DMA)、流变仪、扫描电镜(SEM)和力学性能测试等手段研究了PO3G含量对PU水凝胶结构与性能的影响。结果表明:随着PO3G质量分数的降低,PU的玻璃化转变温度升高,PU软段的结晶能力提高,PU的吸水溶胀度增加,初级溶胀行为由Fickian扩散转向non-Fickian扩散,PU水凝胶的储能模量和损耗模量均降低。随着PO3G质量分数增加,PU及其水凝胶的拉伸强度均显著增加。
A new kind of polyurethane（PU）hydrogels have been prepared based on 100% renewablysourced poly（trimethylene ether）glycol（PO3 G）.The formed PU hydrogels could meet the requirement of sustainability and development of polyurethane materials,and also broaden the application of 100%renewably-sourced PO3 G.A series of PU hydrogels with different PO3 G mass fractions were synthesized by a two-step process.Firstly,the reaction of PO3 G and poly（ethylene glycol）（PEG）with 1,6-diisocyanatohexane（HDI）produced —NCO groups terminated prepolymer,which reacted with 1,4-butanediol further and provided the PU hydrogel.The effects of PO3 G content on the structure and properties of PU hydrogels were studied by Fourier Transform Infrared spectrometer（FT-IR）,Differential Scanning Calorimeter（DSC）,Dynamic Thermomechanical Analysis（DMA）,rheometer,Scanning Electron Microscope（SEM）and measurement of mechanical properties.The results showed that with the decrease of PO3 G mass fraction from 80%to 0,the glass transition temperature of PU increased from-55 ℃to-29 ℃,and the crystallinability of soft segments in the PU was enhanced.The swelling ratio of PU increased from 5%to 394%,and the primary swelling behavior of PU hydrogels transited from the Fickian to non-Fickian diffusion.Both the storage modulus and loss modulus of PU hydrogels decreased due to the fact that the water absorption ratio of PU increased when PO3 G mass fraction decreased.However,the tensile strength of PUs and PU hydrogels increased significantly with the increase of PO3 Gcontent in the PU.
作者
刁森森
阮朦梦
王贵友
DIAO Sen sen;RUAN Meng meng;WANG Gui you(Shanghai Key Laboratory ofAdvanced Polymeric Materials,School of Materials Science andEngineering,East China University of Science and Technology,Shanghai 200237,Chin)
出处
《功能高分子学报》
CAS
CSCD
北大核心
2018年第4期330-339,共10页
Journal of Functional Polymers
基金
杜邦中国集团有限公司资助项目
关键词
聚氨酯
聚乙二醇
聚三亚甲基醚二元醇
水凝胶
溶胀性能
polyurethane
polyethylene glycol
poly （trimethylene ether） glycol
hydrogels
swelling properties
