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添加型阻燃剂对聚氨酯硬泡阻燃性能的影响 被引量:36
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作者 秦桑路 杨振国 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2007年第4期167-169,173,共4页
研究了添加型阻燃剂磷酸三氯乙酯(TCEP)对聚氨酯硬泡阻燃性能的影响和机理。结果表明,随着密度和阻燃剂含量的增加,氧指数(LOI)在上升到一定幅度后趋缓;阻燃剂的添加会影响材料的泡体结构;TCEP先于聚氨酯泡沫降解,使材料在燃烧初期反而... 研究了添加型阻燃剂磷酸三氯乙酯(TCEP)对聚氨酯硬泡阻燃性能的影响和机理。结果表明,随着密度和阻燃剂含量的增加,氧指数(LOI)在上升到一定幅度后趋缓;阻燃剂的添加会影响材料的泡体结构;TCEP先于聚氨酯泡沫降解,使材料在燃烧初期反而不稳定,但是在后期随着材料泡体的破坏,燃烧产生焦炭层,延缓了燃烧。 展开更多
关键词 聚氨酯硬泡塑料 阻燃机理 TCEP 燃烧行为
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环戊烷发泡剂及其聚氨酯硬泡性能研究 被引量:1
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作者 邱颜臣 潘玉风 +2 位作者 周红 张红 周国祥 《化工新型材料》 CAS CSCD 2000年第7期14-16,共3页
本文论述了氯氟烃 (CFC 11)替代品环戊烷 (Cyclopentane)的性质及其应用于全无氟绿色冰箱中聚氨酯硬泡性能的研究结果。解决环戊烷发泡剂易燃、易爆和在聚醚多元醇中溶解度差的问题 ,是开发环戊烷发泡剂应用领域的重要因素。文中列出了... 本文论述了氯氟烃 (CFC 11)替代品环戊烷 (Cyclopentane)的性质及其应用于全无氟绿色冰箱中聚氨酯硬泡性能的研究结果。解决环戊烷发泡剂易燃、易爆和在聚醚多元醇中溶解度差的问题 ,是开发环戊烷发泡剂应用领域的重要因素。文中列出了环戊烷聚氨酯硬泡塑料性能参数 :芯密度 32 6kg/m3;压缩强度 12 5kPa ;导热系数在 2 4℃下为 16 3mW·(m·K) - 1;尺寸稳定性在70℃、2 4h条件下为 0 7%。 展开更多
关键词 环戊烷 聚氨酯硬泡塑料 组合料
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Effect of dosage of expandable graphite,dimethyl methylphosphonate,triethanolamine,and isocyanate on fluidity,mechanical,and flame retardant properties of polyurethane materials in coal reinforcement 被引量:5
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作者 Hu Xiangming Wang Deming Cheng Weimin 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第2期345-352,共8页
In this study,orthogonal experiments were conducted to investigate the influence of expandable graphite(EG),dimethyl methylphosphonate(DMMP),triethanolamine(TEA),and isocyanate content on the compressive and bonding s... In this study,orthogonal experiments were conducted to investigate the influence of expandable graphite(EG),dimethyl methylphosphonate(DMMP),triethanolamine(TEA),and isocyanate content on the compressive and bonding strengths,oxygen index,and fluidity of rigid polyurethane foam(RPUF).The results revealed that EG significantly increased the oxygen index of RPUF,enlarged the diameter of foam cells,and decreased the cell-closed content in foam;thus,leading to a pressure drop in RPUF.However,excessive EG was capable of reducing the fluidity of polyurethane slurry.TEA exhibited significant influence on the compressive strength of RPUF,which dropped initially,and then increased.DMMP had a remarkable effect on the flame retardant property and compressive strength of RPUF.Compressive strength of RPUF initially displayed an increase followed by a decrease with increasing dosage of DMMP,and achieved the maximum value at DMMP dosage of 4%.DMMP could effectively reduce the diameter of RPUF cells leading to an increase in the percentage of close area in foam.DMMP displayed the flame-retardation effects mainly in the gas phase leading to a significant enhancement in the oxygen index of RPUF.Moreover,the compressive strength and bonding strength of RPUF decrease significantly with the increase of isocyanate content due to the increased blowing efficiency by the CO_2.The oxygen index and flowing length of foam increased with the increase in isocyanate dosage. 展开更多
关键词 Rigid polyurethane foam Expandable graphite Compressive strength Flame retardant Scanning electron microscopy(SEM) Microstructure
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