摘要
为改善环氧乙烷-四氢呋喃共聚醚(PET)固体推进剂黏合剂的力学性能,采用超支化聚氨酯(HBPU)与以PET为基聚氨酯(PU)相形成半互穿网络,并测试了PET胶片的力学性能。结果表明,超支化聚氨酯可以明显提高PET胶片的力学性能,超支化聚氨酯改性胶片的延伸率最大达650.14%,是相同R值时空白PET胶片的2.09倍。当R值为1.5时,超支化聚氨酯改性胶片的拉伸强度有显著增加,可以达到1.64M Pa,是空白胶片的2.23倍。超支化聚氨酯对PET胶片起到了很好的增强增韧作用。
In order to improve the mechanical properties of the adhesives in PET-based solid propellant, the hyperbranched polyurethane was used as a phase to the formation of semi-IPN with PET-based polyurethane （PU）. The results showed that the addition of hyperbranched polyurethane can significantly improve the mechanical properties of PET film, with the maximum elongation of 650.14% which is 2.09 times of the blank PET film under the same case of R value. The tensile strength of the hyperbranched polyurethane modified PET films with the R value of 1.5 was improved significantly to the maximum of 1.64MPa which is 2.23 times of the blank PET film. The addition of hyperbranched polyurethane played a very good role in strengthening and toughening modification of PET films.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2009年第6期11-14,19,共5页
Chinese Journal of Explosives & Propellants
基金
火炸药行业青年基金项目(42001060202)
关键词
材料科学
固体推进剂
PET
胶片
超支化聚氨酯
力学性能
material science
solid propellant
PET
film
hyperbranched polyurethane
mechanical property
