【摘要】：為改善GAP基含能熱塑性彈性體(ETPEs)粘合劑的力學(xué)性能,通過溶液共聚,以一縮二乙二醇(DEG)為擴鏈劑,合成得到聚疊氮縮水甘油醚/聚己內(nèi)酯(GAP/PCL)含能熱塑性彈性體。通過傅里葉變換紅外光譜(FTIR)對合成的ETPEs進行結(jié)構(gòu)表征,萬能材料拉伸機和動態(tài)熱機械分析(DMA)測試其力學(xué)性能。研究比較—NCO/—OH摩爾比(R值)、擴鏈劑用量、異氰酸酯種類和軟段中GAP/PCL質(zhì)量比對ETPE力學(xué)性能的影響。結(jié)果表明,制備的ETPEs具有典型的疊氮聚醚聚氨酯特征;確定當(dāng)R=1.15,DEG的羥基占總反應(yīng)羥基的40%時,ETPEs的力學(xué)性能較好,抗拉強度為13.50 MPa、斷裂伸長率為1 654%,升高軟段中PCL的含量時,試樣力學(xué)性能上升明顯;低溫力學(xué)性能中,軟段柔順性好的PCL的引入,會降低ETPEs的儲能模量,玻璃化轉(zhuǎn)變溫度Tg最低可至-30.4℃。
[Abstract]:In order to improve the mechanical properties of GAP based thermoplastic elastomer (ETPEs) adhesive, diethylene glycol (DEG) was used as chain extender by solution copolymerization. Poly (glycidyl azide) / polycaprolactone (GAP/PCL) thermoplastic elastomer was synthesized. The structure of the synthesized ETPEs was characterized by Fourier transform infrared spectroscopy (FTIR). The mechanical properties of the synthesized ETPEs were tested by tensile machine and dynamic thermo-mechanical analysis (DMA). The effects of molar ratio of NCO/-OH (R value), amount of chain extender, type of isocyanate and mass ratio of GAP/PCL in soft segment on the mechanical properties of ETPE were studied. The results show that the prepared ETPEs has typical azido-polyether polyurethane characteristics. It is determined that when the hydroxyl groups of RG1.15DEG account for 40 of the total reaction hydroxyl groups, the mechanical properties of ETPEs are better, the tensile strength is 13.50 MPa, and the elongation at break is 1 654. When the content of PCL in the soft segment is increased, the mechanical properties of the samples increase obviously. In the low temperature mechanical properties, the introduction of PCL with good flexibility in soft section will reduce the storage modulus of ETPEs, and the glass transition temperature (Tg) can be as low as -30.4 鈩，

本文編號：2355649