采用聚对苯二甲酸乙二醇酯(PET)与本征阻燃材料聚醚酰亚胺(PEI)共混、熔融制备PET/PEI合金,基于Materials Studio 7.0软件构建PET/PEI分子模型,进行相结构模拟,研究PET/PEI合金的相容性,并探讨PEI含量对PET/PEI合金力学性能及阻燃性能...采用聚对苯二甲酸乙二醇酯(PET)与本征阻燃材料聚醚酰亚胺(PEI)共混、熔融制备PET/PEI合金,基于Materials Studio 7.0软件构建PET/PEI分子模型,进行相结构模拟,研究PET/PEI合金的相容性,并探讨PEI含量对PET/PEI合金力学性能及阻燃性能的影响。结果表明:在任意共混比下PET/PEI合金为互不相容体系,当PEI质量分数为10%时,PET-PEI分子间C—C原子对之间的径向分布函数值为4.09,大于PEI-PEI分子间C—C原子对之间的径向分布函数值,PET/PEI合金相容性相对较好;当PEI质量分数为10%时,PET/PEI合金拉伸强度最高,为47.2 MPa;PET/PEI合金的极限氧指数(LOI)随PEI含量的增加而增大,PEI质量分数为10%时合金的LOI为24.3%,PEI质量分数为15%时合金的LOI为27.0%;PET与PEI相容性不佳,但加入PEI仍能有效改善PET/PEI合金的力学性能和阻燃性能,PEI质量分数为10%时PET/PEI合金相容性较好,力学性能好,同时阻燃性能也得到提升。展开更多
通过复分解反应合成了三种2-羧乙基苯基次膦酸盐(CEPCA、CEPAL、CEPSN)阻燃剂,其化学结构被傅里叶红外光谱(FTIR)、核磁共振氢谱( 1 H NMR)与元素分析所表征。随后,它们被分别加入尼龙6中制备阻燃复合材料(FRPA6),利用热重分析(TG)、垂...通过复分解反应合成了三种2-羧乙基苯基次膦酸盐(CEPCA、CEPAL、CEPSN)阻燃剂,其化学结构被傅里叶红外光谱(FTIR)、核磁共振氢谱( 1 H NMR)与元素分析所表征。随后,它们被分别加入尼龙6中制备阻燃复合材料(FRPA6),利用热重分析(TG)、垂直燃烧测试、极限氧指数( LOI )测试和扫描电子显微镜(SEM)对FRPA6的热性能、阻燃性能与残炭形貌进行了分析。结果表明,三种次膦酸盐的热稳定性较2-羧乙基苯基次膦酸(CEPPA)都有较大提升,CEPCA的热分解温度( T -5%)上升最明显,由223.4 ℃上升到539.1 ℃。从阻燃性能看,CEPAL的阻燃性能最佳,在添加量为20%时,其 LOI 为32.1%并达到UL94 V-1等级。CEPAL阻燃性能更好的原因在于,其燃烧后生成了更加致密、完整的炭层,这种炭层能有效隔热隔氧从而中断燃烧行为。展开更多
The reaction of [Et4N]2WOS3 with three equiv.of CuI and dmpzm in MeCN afforded [WOS3Cu3I（dmpzm）2]·2（MeCN）0.5（1·2（MeCN）0.5） while that of [PPh4]2WS4 with four equiv.of CuI in DMF/MeCN followed by the ...The reaction of [Et4N]2WOS3 with three equiv.of CuI and dmpzm in MeCN afforded [WOS3Cu3I（dmpzm）2]·2（MeCN）0.5（1·2（MeCN）0.5） while that of [PPh4]2WS4 with four equiv.of CuI in DMF/MeCN followed by the addition of two equiv.of dmpzm in MeOH gave rise to [WS4Cu4I2（dmpzm）2]·DMF（2·DMF）.Both compounds were characterized by elemental analysis,IR,and single-crystal X-ray diffraction analysis.1·2（MeCN）0.5 crystallizes in triclinic,space group P1-with a = 11.4552（5）,b = 11.6735（3）,c = 16.2278（9） ,α = 99.537（9）,β = 101.986（2）,γ = 118.464（13）o,V = 1775.5（3）3,Z = 2,μ = 6.080 mm-1,Dc = 1.983 Mg/m3,T = 193（2） K,C24H35Cu3IN9OS3W,Mr = 1063.22,F（000） = 1018,S = 1.060,R = 0.0376 and wR = 0.0870.2·DMF belongs to the orthorhombic system,space group Pmn21 with a = 22.145（4）,b = 11.464（2）,c = 7.7370（15） ,V = 1964.2（6）3,Z = 2,μ = 6.865 mm-1,Dc = 2.189 Mg/m3,T = 193（2） K,C25H39Cu4I2N9OS4W,Mr = 1301.72,F（000） = 1226,R = 0.0632,wR = 0.1706 and S = 1.130.1·2（MeCN）0.5 consists of one CuI and two [Cu（dmpzm）]＋ fragments that are linked by [WOS3]2-species via six Cu-S bonds,forming a nido-like [WS3Cu3] core.2·DMF contains a saddle-shaped [WS4Cu4] core with two iodides coordinated at two Cu centers in a cis position and two dmpzm ligands being chelated at another two Cu centers in a cis position.展开更多
文摘采用聚对苯二甲酸乙二醇酯(PET)与本征阻燃材料聚醚酰亚胺(PEI)共混、熔融制备PET/PEI合金,基于Materials Studio 7.0软件构建PET/PEI分子模型,进行相结构模拟,研究PET/PEI合金的相容性,并探讨PEI含量对PET/PEI合金力学性能及阻燃性能的影响。结果表明:在任意共混比下PET/PEI合金为互不相容体系,当PEI质量分数为10%时,PET-PEI分子间C—C原子对之间的径向分布函数值为4.09,大于PEI-PEI分子间C—C原子对之间的径向分布函数值,PET/PEI合金相容性相对较好;当PEI质量分数为10%时,PET/PEI合金拉伸强度最高,为47.2 MPa;PET/PEI合金的极限氧指数(LOI)随PEI含量的增加而增大,PEI质量分数为10%时合金的LOI为24.3%,PEI质量分数为15%时合金的LOI为27.0%;PET与PEI相容性不佳,但加入PEI仍能有效改善PET/PEI合金的力学性能和阻燃性能,PEI质量分数为10%时PET/PEI合金相容性较好,力学性能好,同时阻燃性能也得到提升。
文摘通过复分解反应合成了三种2-羧乙基苯基次膦酸盐(CEPCA、CEPAL、CEPSN)阻燃剂,其化学结构被傅里叶红外光谱(FTIR)、核磁共振氢谱( 1 H NMR)与元素分析所表征。随后,它们被分别加入尼龙6中制备阻燃复合材料(FRPA6),利用热重分析(TG)、垂直燃烧测试、极限氧指数( LOI )测试和扫描电子显微镜(SEM)对FRPA6的热性能、阻燃性能与残炭形貌进行了分析。结果表明,三种次膦酸盐的热稳定性较2-羧乙基苯基次膦酸(CEPPA)都有较大提升,CEPCA的热分解温度( T -5%)上升最明显,由223.4 ℃上升到539.1 ℃。从阻燃性能看,CEPAL的阻燃性能最佳,在添加量为20%时,其 LOI 为32.1%并达到UL94 V-1等级。CEPAL阻燃性能更好的原因在于,其燃烧后生成了更加致密、完整的炭层,这种炭层能有效隔热隔氧从而中断燃烧行为。
基金Supported by the National Natural Science Foundation of China (No. 20525101,20801038) "Soochow Scholar" Program of Suzhou University
文摘The reaction of [Et4N]2WOS3 with three equiv.of CuI and dmpzm in MeCN afforded [WOS3Cu3I（dmpzm）2]·2（MeCN）0.5（1·2（MeCN）0.5） while that of [PPh4]2WS4 with four equiv.of CuI in DMF/MeCN followed by the addition of two equiv.of dmpzm in MeOH gave rise to [WS4Cu4I2（dmpzm）2]·DMF（2·DMF）.Both compounds were characterized by elemental analysis,IR,and single-crystal X-ray diffraction analysis.1·2（MeCN）0.5 crystallizes in triclinic,space group P1-with a = 11.4552（5）,b = 11.6735（3）,c = 16.2278（9） ,α = 99.537（9）,β = 101.986（2）,γ = 118.464（13）o,V = 1775.5（3）3,Z = 2,μ = 6.080 mm-1,Dc = 1.983 Mg/m3,T = 193（2） K,C24H35Cu3IN9OS3W,Mr = 1063.22,F（000） = 1018,S = 1.060,R = 0.0376 and wR = 0.0870.2·DMF belongs to the orthorhombic system,space group Pmn21 with a = 22.145（4）,b = 11.464（2）,c = 7.7370（15） ,V = 1964.2（6）3,Z = 2,μ = 6.865 mm-1,Dc = 2.189 Mg/m3,T = 193（2） K,C25H39Cu4I2N9OS4W,Mr = 1301.72,F（000） = 1226,R = 0.0632,wR = 0.1706 and S = 1.130.1·2（MeCN）0.5 consists of one CuI and two [Cu（dmpzm）]＋ fragments that are linked by [WOS3]2-species via six Cu-S bonds,forming a nido-like [WS3Cu3] core.2·DMF contains a saddle-shaped [WS4Cu4] core with two iodides coordinated at two Cu centers in a cis position and two dmpzm ligands being chelated at another two Cu centers in a cis position.
