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摘要：通过差示扫描量热法（DSC）、力学性能测试、偏光测试及融指测试等，考察构建POE/EAA-Ca/PA6复合成核剂，探索其对POM力学性能与结晶行为影响。研究结果表明：EAA接枝前后改性POM，因POE与POM极性相差较大，蜡与钙混合改性POM断裂伸长率提升，但拉伸强度下降；POM/POE=85/15混合改性POM冲击强度显著下降，拉伸强度改善不明显，可见明显分层现象，相容性不好；固定PA6/EAA-Ca不变，POE/PA6=7/3以1%的成核剂改性POM，力学性能无显著变化，融指提升；不同含量PA6（0.15-0.9%）制得粉末成核剂，PA6为0.3%时，冲击强度提升13%，断裂伸长率提升22%，拉伸强度提升4%，结晶温度提升1.17，过冷度降低0.22，其力学与结晶性能皆改善。综上PA6添加量0.3%制得粉末成核剂增韧改性POM效果最佳。20182
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毕业论文关键词： 聚甲醛； 成核剂； 力学性能；结晶性能
The Research of Modification on POM with EAA-Ca/POE/PA6 Composite
Abstract： By calorimetry (DSC), mechanical testing, polarizing and financial means test and other tests, POE/EAA-Ca/PA6 composite nucleating agent, to explore its effects about mechanical properties and crystallization behavior of POM. The results show that EAA graft modify POM front and back, because POM and POE have different polar wax mixed with calcium-modified POM elongation increase, but the tensile strength decreased; POM / POE = 85/15 composite change POM to significant decrease of impact strength, little improvement on tensile strength and significant delamination due to poor compatibility; 1% POE/PA6 = 7/3 nucleating agent fixed with PA6/EAA-Ca to modify POM shows no significant change about mechanical properties but enhance the melt; The powder of the nucleating agent with different content of PA6 (0.15-0.9%) modify POM shows that when PA6 is added with 0.3%, improve the impact strength of 13%, elongation at break of 22% and tensile strength increase of 4%. Crystallization temperature 1.17℃ and undercooling 0.22.Its mechanics and crystallization properties are improved. To summary, the powder of a nucleating agent with PA6 0.3% modified POM has best results.
Key Words: POM；nucleating agent；Mechanical properties；crystallization properties
目 录
1 前言 1
1.1 复合改性聚甲醛分析 2
1.2 改性聚甲醛POM成核剂国内外研究现状 3
1.3 研究目的和意义 5
2 实验方法与表征 6
2.1 实验原料 6
2.2 实验设备 6
2.3 制备工艺流程 7
2.4 力学性能与结晶行为 7
2.4.1 力学性能测试 7
2.4.2 示差量热扫描 8
2.4.3 偏光显微镜 8
3 实验部分 9
3.1 POE接枝前后对POM增韧改性 9
3.1.1 EAA-Ca改性POM 9
3.1.2 EAA-Ca、POE改性POM 9
3.1.3 接枝POE增韧改性POM 9
3.2 EAA/CA/POE混合改性POM 10
3.3 不同含量PA6改性POM 10
3.4 复合成核剂改性POM 10
3.4.1 尼龙成核剂制备与对比 10
3.4.2 POE/PA6/EAA-Ca改性POM 10
4 实验结果与讨论 11
4.1 POE接枝前后对POM影响 11
4.1.1 EAA-Ca改性POM表征 11