双丙酮丙烯酰胺在固体推进剂粘合体系中的应用  

Applications of Diacetone Acrylamide in Solid Propellant Binder

作　　者：叶彦春[1] 初立秋[2] 陈煜[2] 谭惠民[2] 

机构地区：[1]北京理工大学理学院,北京100081 [2]北京理工大学材料科学与工程学院,北京100081

出　　处：《精细化工》2008年第7期704-707,共4页Fine Chemicals

摘　　要：用互穿聚合物网络技术（IPN），将双丙酮丙烯酰胺（DAAM）用于PU粘合剂的改性，考察了固化参数、组分比、引发剂用量对PDAAM／PU互穿网络体系力学性能及微观形态的影响。结果表明，PDAAM质量分数为40％，固化参数为1．4，引发剂过氧化苯甲酰（BPO）的质量分数在0．8％～1％时，拉伸强度最高可达1．028MPa，比相同条件下制备的纯PU的拉伸强度（0．238MPa）提高了332％；断裂伸长率达到327．35％，比相同条件下制备的纯PU的断裂伸长率（49．02％）提高了568％。组成比、固化催化剂、引发剂用量对PDAAM／PUIPN的微观形态也有影响。PDAAM质量分数较大时，两相界面模糊，互穿较好。三苯基铋（TPB）作为固化催化剂或塑料相的引发剂浓度较低，两相反应速度相近时，相畴较小。Diacetone acrylamide（DAAM） was used to modify the polyurethane （PU） propellant binder. A series of interpenatrating polymer networks（IPNs） were synthesized by DAAM based PU. Effects of the curing parameter, the component ratio and the initiator quantity on the mechanical properties of PDAAM/PU IPN were studied. The results demonstrated that the mechanical properties of PU bindings were improved by the addition of DAAM. When w （PDAAM） = 40% , the curing parameter was 1.4 and the quantity of initiator benzoyl peroxide （BPO） was 0.8% - 1% , the tensile strength was as high as 1. 028 MPa. Compared with the tensile strength （0. 238 MPa） of pure PU synthesized under the same conditions,the tensile strength was improved by 332%. The elongation at break was 327.35% , while that of pure PU was only 49. 02%. The morphology of the IPN was also affected by the component ratio,the curing catalyst and the initiator quantity. The phase boundaries when w （PDAAM） = 50% were less demarcated than w （PDAAM） = 25%. The phase domain size was small when the relative reaction rates of two phases were close.

关 键 词：双丙酮丙烯酰胺 互串网络聚合物 聚氨酯 粘合剂 力学性能 微观形态 

分 类 号：TQ225.24[化学工程—有机化工]