A one dimensional bimetallic compound ｛〔CuCd(pba)(H 2O) 3〕·2H 2O｝ n in which pba was propylenebis (oxamic acid), was prepared. Crystal structure of the title compound was determined. It belongs to orthorhombi...A one dimensional bimetallic compound ｛〔CuCd(pba)(H 2O) 3〕·2H 2O｝ n in which pba was propylenebis (oxamic acid), was prepared. Crystal structure of the title compound was determined. It belongs to orthorhombic system, molecular formula CuCdC 7H 16 N 2O 11 , M r =480.17, space group Pnma(#62), a=12.953(2), b=21 626(6), c=5.253(3), V=1471(2) 3 and D x =2.17g/cm 3 for Z =4. The structure was solved by direct methods with final R =0.052 and R w =0.063 for 1055 observed reflections with I>3σ(I ). Two nitrogen atoms and two oxygen atoms from the oxamide and a water molecule coordinated to the Cu II ion forming a square pyramidal geometry. Four oxygen atoms from the oxamide and two water molecules coordinated to the Cd II ion forming an elongated octahedral geometry.展开更多
以聚对苯二甲酸(PTA)、1,3-丙二醇(1,3-PDO)与1,4-环己烷二甲醇(CHDM)制备具有低结晶性能的聚对苯二甲酸1,3-丙二醇-co-1,4-环己烷二甲酯(PTTG)作为第三组分,采用熔融挤出法制备易于染色的低结晶度丙烯腈-丁二烯-苯乙烯塑料(ABS)/聚对...以聚对苯二甲酸(PTA)、1,3-丙二醇(1,3-PDO)与1,4-环己烷二甲醇(CHDM)制备具有低结晶性能的聚对苯二甲酸1,3-丙二醇-co-1,4-环己烷二甲酯(PTTG)作为第三组分,采用熔融挤出法制备易于染色的低结晶度丙烯腈-丁二烯-苯乙烯塑料(ABS)/聚对苯二甲酸1,3-丙二酯(PTT)/PTTG三元共混复合材料。通过差示扫描量热仪、热重分析、扫描电子显微镜和电子万能试验机考察了PTTG的质量分数对ABS/PTT/PTTG复合材料的热稳定性、断面形貌、相容性及力学性能的影响。研究结果表明,随着PTTG共聚酯含量增加,ABS/PTT/PTTG复合材料的熔融温度和结晶性能逐渐降低,结晶度由48.08%降低到24.42%,PTTG对ABS/PTT复合材料具有明显的增容作用,同时材料的热稳定性也逐渐提高。当PTTG的质量分数达到25%时,有较为明显的屈服现象,复合材料断面发生韧性断裂,呈现韧性断裂特征;拉伸强度和弯曲强度随着PTTG含量的增加逐渐降低,当PTTG的质量分数达到25%时,复合材料的缺口冲击强度达到4.4 k J/m~2,较ABS/PTT复合材料提高了29.41%。展开更多
文摘A one dimensional bimetallic compound ｛〔CuCd(pba)(H 2O) 3〕·2H 2O｝ n in which pba was propylenebis (oxamic acid), was prepared. Crystal structure of the title compound was determined. It belongs to orthorhombic system, molecular formula CuCdC 7H 16 N 2O 11 , M r =480.17, space group Pnma(#62), a=12.953(2), b=21 626(6), c=5.253(3), V=1471(2) 3 and D x =2.17g/cm 3 for Z =4. The structure was solved by direct methods with final R =0.052 and R w =0.063 for 1055 observed reflections with I>3σ(I ). Two nitrogen atoms and two oxygen atoms from the oxamide and a water molecule coordinated to the Cu II ion forming a square pyramidal geometry. Four oxygen atoms from the oxamide and two water molecules coordinated to the Cd II ion forming an elongated octahedral geometry.
文摘以聚对苯二甲酸(PTA)、1,3-丙二醇(1,3-PDO)与1,4-环己烷二甲醇(CHDM)制备具有低结晶性能的聚对苯二甲酸1,3-丙二醇-co-1,4-环己烷二甲酯(PTTG)作为第三组分,采用熔融挤出法制备易于染色的低结晶度丙烯腈-丁二烯-苯乙烯塑料(ABS)/聚对苯二甲酸1,3-丙二酯(PTT)/PTTG三元共混复合材料。通过差示扫描量热仪、热重分析、扫描电子显微镜和电子万能试验机考察了PTTG的质量分数对ABS/PTT/PTTG复合材料的热稳定性、断面形貌、相容性及力学性能的影响。研究结果表明,随着PTTG共聚酯含量增加,ABS/PTT/PTTG复合材料的熔融温度和结晶性能逐渐降低,结晶度由48.08%降低到24.42%,PTTG对ABS/PTT复合材料具有明显的增容作用,同时材料的热稳定性也逐渐提高。当PTTG的质量分数达到25%时,有较为明显的屈服现象,复合材料断面发生韧性断裂,呈现韧性断裂特征;拉伸强度和弯曲强度随着PTTG含量的增加逐渐降低,当PTTG的质量分数达到25%时,复合材料的缺口冲击强度达到4.4 k J/m~2,较ABS/PTT复合材料提高了29.41%。
