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采用扩链后共混再熟化的方法,制备了1组不同组成的硝化棉(NC)/含能热塑性弹性体(GAP-TPE)共混聚合物。采用红外光谱(FTIR)和X射线衍射(XRD)表征NC/GAP-TPE共混物的结构,扫描电镜(SEM)观察共混物的断面,动态热机械分析(DMA)测定共混物的玻璃化转变,运用拉伸实验研究不同配比NC/GAP-TPE共混物的力学性能。结果表明,NC和GAP-TPE分子间存在氢键相互作用。NC均匀分散在GAP-TPE基体中,不同配比的NC/GAP-TPE共混物均存在1个玻璃化温度,二者之间具有较好的相容性。当NC含量从5%到20%变化时,共混试样的拉伸强度从10.4 MPa增加至20.4 MPa,提高了49%。
A series of nitrocellulose (NC) / elastomeric thermoplastic elastomers (GAP-TPE) blends were prepared by chain extension and post-curing. The structures of NC / GAP-TPE blends were characterized by FTIR and XRD. The cross-sections of the blends were observed by scanning electron microscopy (SEM) and the glass of the blends was determined by dynamic thermo-mechanical analysis (DMA) Tensile test was used to study the mechanical properties of NC / GAP-TPE blends with different proportions. The results show that there is hydrogen-bonding interaction between NC and GAP-TPE molecules. NC dispersed uniformly in the matrix of GAP-TPE. NC / GAP-TPE blends at different ratios all had one glass transition temperature, which showed good compatibility between the two. When the NC content changes from 5% to 20%, the tensile strength of the blends increases from 10.4 MPa to 20.4 MPa, an increase of 49%.