利用聚硼硅氧烷(PBDMS)中的动态化学键—Si—O—B调控尼龙11(PA11)的冲击和抗压性能,通过熔融共混方式在PA11中添加PBDMS制备了PBDMS/PA11复合材料,研究了PBDMS含量对复合材料冲击性能、压缩性能及形貌结构的影响,并阐述了PBDMS影响PA11性能的机理。结果表明:复合材料的悬臂梁缺口冲击强度随着PBDMS含量的增加而提高,PBDMS质量分数为12%时,悬臂梁缺口冲击强度达到最大值9.9kJ/m2,比纯PA11增加25%;复合材料的压缩永久变形率则随着PBDMS含量的增加而降低,PBDMS质量分数为15%时,压缩永久变形率最低为6%,比纯PA11降低50%。
The dynamic chemical bond-Si-O-B in polyborosiloxane (PBDMS) was used to regulate the impact and compression properties of nylon 11 (PA11).PBDMS/PA11 composites were prepared by adding PBDMS to PA11 with melt blending method.The effects of PBDMS content on the impact,compression properties and morphology structure of the samples were investigated,and the mechanism of PBDMS affecting the performance of PA11 was expounded.The results indicated that the cantilever beam notched impact strength of the composites increased with the increase of PBDMS content,and it reached the maximum value of 9.9kJ/m2 when the PBDMS mass fraction was 12%,which was 25% higher than that of pure PA11.The compression permanent deformation rate of the composites decreased with the increase of PBDMS content,and it achieved the lowest value of 6% when the PBDMS mass fraction was 15%,which was 50% lower than that of pure PA11.
[1] Jin J,Rafiq R,Gill Y Q,et al.Preparation and characterization of high performance of graphene/nylon nanocomposites[J].Eur Polym J,2013,49:2617-2626.
[2] Rasselet D,Caro-Bretelle A S,Taguet A,et al.Reactive compatibilization of PLA/PA11 blends and their application in additive manufacturing[J].Materials,2019,12:485.
[3] Deng L,Xu C,Ding S,et al.Processing a supertoughened polylactide ternary blend with high heat deflection temperature by melt blending with a high screw rotation speed[J].Ind Eng Chem Res,2019,58:10618-10628.
[4] Babu R P,O'connor K,Seeram R.Current progress on bio-based polymers and their future trends[J].Prog Biomater,2013,2:1-16.
[5] Gandini A.Polymers from renewable resources:a challenge for the future of macromolecular materials[J].Macromolecules,2008,41:9491-9504.
[6] 宋新月,魏悦,沈杰,等.超高分子量聚乙烯模塑板材的抗冲击机制[J].高等学校化学学报,2023,44(4):188-197.
[7] Li X,Zhang D,Xiang K,et al.Synthesis of polyborosiloxane and its reversible physical crosslinks[J].RSC Advances,2014,4:32894-32901.
[8] Zhao H,Zhao J,Li H,et al.Preparation and characterization of polyborosiloxanes and their blends with phenolic resin as shapeable ceramic precursors[J].Cinese J Polym Sci,2014,32:187-196.
[9] Ran G,Liu X,Guo J,et al.Improving the flame retardancy and water resistance of polylactic acid by introducing polyborosiloxane microencapsulated ammonium polyphosphate[J].Compos B Eng,2019,173:106772.
[10] Chen Q,Li S,Wang X,et al.Enhanced cycle loading stability of shock transmission units via adjusting boron content of polyborosiloxanes[J].Mater Today Commun,2023,36:106638.
[11] 范伟,李峰,武超,等.PBDMS改性双组分硅胶的动态力学及抗冲击性能研究[J].化工新型材料,2020,48(5):125-129.
[12] 王文广.塑料改性实用技术[M].北京:中国轻工业出版社,2000:23.
[13] Di Lorenzo M L,Longo A,Androsch R.Polyamide 11/poly (butylene succinate) bio-based polymer blends[J].Materials,2019,12:2833.
[14] Mathias L J,Powell D G,Autran J P,et al.Nitrogen-15 NMR characterization of multiple crystal forms and phase transitions in polyundecanamide (Nylon 11)[J].Macromolecules,1990,23:963-967.
[15] Powell D G,Sikes A M,Mathias L J.Natural abundance 15N CP/MAS nmr of solid polyamides:a technique sensitive to composition and conformation in the solid state[J].Polymer,1991,32:2523-2533.
[16] Mathias L J,Powell D G,Sikes A M.Natural abundance 15NCP/MAS nmr of nylons.A sensitive technique for evaluating crystalline composition and conformation in solid polyamides[J].Polym Polym Compos,1988,29:192-193.
基金资助
陕西省自然科学基础研究计划青年项目(2022JQ-432)
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