摘要
以月桂基磺化琥珀酸单酯二钠为发泡剂,采用物理发泡的方法配制水性聚氨酯(WPU)发泡浆料,经干法工艺制备WPU膜,研究了发泡剂含量对WPU膜形态结构和性能的影响。结果表明:当发泡剂含量从0增加到8%,WPU膜的泡孔密度、表面孔孔径、平均孔径、透气量和透湿率等均随着发泡剂含量的增大而增大,而断裂强度和断裂伸长率恰好相反;当发泡剂含量为8%时,膜的透气量和透湿率分别为43.25 L/(m^2·s)和4766.08 g/(m^2·24h),断裂强度和断裂伸长率分别为1.24 MPa和407.60%。随着发泡剂含量进一步增加,膜的断面出现闭孔结构,透气量和透湿率减小,而断裂强度和断裂伸长率显著增加。
The waterborne polyurethane （WPU） slurry using disodium monolauryl sulfosuccinate as the foaming agent was prepared through physical-mechanical foaming. And the WPU membranes were made by dry process. The effects of foaming agent concentration on the structure and performance of WPU membranes were investigated. The results showed that the foam density,surface pore size, mean pore size, air permeability and water vapor permeability of the obtained WPU membrane increased with an increase from 0 to 8% in foaming agent concentration, and the tensile strength and elongation at break decreased. When foaming agent concentration was 8% , the air permeability and water vapor permeability of WPU membrane obtained was 43.25 L/（ m2 s） and 4766.08 g/（ m2 24h） respectively,and the tensile strength and elongation at break was 1.24 MPa and 407. 60% respectively. Further, the WPU membrane with the increase of foaming agent concentration exhihibited closed-cell structure. The air permeability and water vapor permeability of the obtained WPU membrane decreased with the increase of foaming agent concentration, and the tensile strength and elongation at break increased with the increase of foaming agent concentration.
出处
《塑料》
CSCD
北大核心
2017年第3期51-54,68,共5页
Plastics
基金
国家科技支撑计划(2014BAE09B00)
天津市应用基础与前沿技术研究计划(15JCZDJC38500)
关键词
水性聚氨酯
发泡剂含量
泡孔结构
透气量
透湿率
断裂强度
waterborne polyurethane （ WPU ）
foaming agent concentration
bubble structure
air permeability
water vapor permeability
tensile strength
