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采用热分析、扫描电镜、力学性能测试方法研究了木质素磺酸钙(HLS)与PVA的相互作用及HLS对PVA热性能、结晶性能和力学性能的影响.结果表明,HLS可均匀分布在PVA基体中,HLS与PVA的FloryHuggins相互作用参数为负值(≈-0.0002),意味着HLS与PVA间存在强相互作用,具有良好的相容性,在熔融状态下可混容;HLS可降低PVA的平衡熔点,提高PVA的热分解温度,拓宽PVA的热塑加工温度窗口;HLS可抑制PVA结晶,对PVA起增强作用,使HLS/PVA共混膜的拉伸强度和杨氏模量升高,断裂伸长率减小,35%HLS可使PVA的拉伸强度和杨氏模量分别提高91.9%和604.7%.
The effects of HLS on the thermal and mechanical properties of PVA were investigated by means of thermal analysis, scanning electron microscopy and mechanical testing. The results showed that HLS could be uniformly distributed in PVA In the matrix, the Flory Huggins interaction parameter between HLS and PVA is negative (≈-0.0002), which means there is a strong interaction between HLS and PVA, which has good compatibility and can be mixed in the molten state. HLS can reduce the PVA HLS can inhibit the crystallization of PVA and enhance the PVA, so that the tensile strength and Young’s modulus of HLS / PVA blend membrane increase , The elongation at break decreases, 35% HLS can increase the tensile strength and Young’s modulus of PVA by 91.9% and 604.7% respectively.