以对氨基苯硫酚与4,4′-二氯二苯砜为原料,合成出芳香二胺单体S,S′-双（对氨基苯基）对二苯砜,反应产率为70.26%。以此芳香二胺和三种不同芳香二酐为单体,通过低温聚合反应合成了高分子量的聚酰胺酸,热亚胺化的产物在极性强的溶剂中具有较好的溶解性。差示扫描量热（DSC）和热重分析（TG）等测试表明,三种聚合物均为无定型结构,其玻璃化转变温度（Tg）介于234℃~242℃,在氮气气氛中,5%,10%的热失重温度（Td）分别在469℃,500℃以上。力学性能测试表明,这些可溶性聚酰亚胺薄膜的拉伸强度,弹性模量分别能达到166.23 MPa,2.45 GPa。
An aromatic diamine monomer,S,S′-bis（p-aminophenyl）terediphenylsulfone（APPS） was synthesized by employing 4-mercaptoaniline and bis-（4-chlorophenyl）sulfone as starting materials.The structure of monomer was characterized by Fourier transform infrared spectrum（FT-IR）,1H nuclear magnetic resonance spectrum（1H-NMR） and elemental analysis.A series of new polyimides（PIs） having inherent viscosities of 1.46 dL/g～1.76 dL/g were synthesized from aromatic diamine APPS with various commercially available aromatic dianhydrides using a standard two-stage process with thermal imidization of poly（amic-acid）s（PAAs） films.The structure of polymers was respectively investigated by FT-IR and elemental analysis.All the new polyimides are soluble in strongly polar solvents.They have good thermal stability with the glass transition temperature of 234 ℃～242 ℃,the temperature of 5% and 10% weight loss in nitrogen are in the range of 469 ℃～502 ℃ and 501 ℃～510 ℃ respectively.All PIs are found to hold outstanding mechanical properties with the tensile strengths of 121.51 MPa～166.23 MPa and Young′s modulus of 1.91 GPa～2.45 GPa.
参考文献
| [1] | Shang ZP;Lu CL;Zhao JY;Yan JL;Ding MX;Gao LX .One-pot synthesis of polyetherimides from bis(chlorophthalimide) and dichlorodiphenylsulfone in diphenylsulfone[J].Journal of Applied Polymer Science,2006(5):4584-4588. |
| [2] | Zhiming Qiu;Suobo Zhang .Synthesis and properties of organosoluble polyimides based on 2,2'-diphenoxy-4,4',5,5'-biphenyltetracarboxylic dianhydride[J].Polymer: The International Journal for the Science and Technology of Polymers,2005(5):1693-1700. |
| [3] | Liaw DJ.;Hsu PN.;Chen WH.;Lin SL. .High glass transitions of new polyamides, polyimides, and poly(amide-imide)s containing a triphenylamine group: Synthesis and characterization[J].Macromolecules,2002(12):4669-4676. |
| [4] | Shahram Mehdipour-Ataei;Mehdi Hatami .Aromatic poly(sulfone sulfide amide imide)s as new types of soluble thermally stable polymers[J].Polymers for Advanced Technologies,2007(4):292-298. |
| [5] | Hsiao SH;Chang YH .New soluble aromatic polyamides containing ether linkages and laterally attached p-terphenyls[J].European Polymer Journal,2004(8):1749-1757. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%