BAMPM基高可溶高透光聚酰亚胺的制备及表征
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摘要
将3,3',5,5'-四甲基-4,4'-二胺基苯基-4''-甲基甲苯(BAMPM)与均苯四甲酸二酐(PMDA)、联苯四甲酸二酐(BPDA)、联苯醚二酐(ODPA)、六氟二酐(6FDA)通过一步高温缩聚法制备了四种新型聚酰亚胺(PI)。所得聚酰亚胺在普通有机溶剂中具有优异的溶解性。聚酰亚胺的玻璃化转变温度(Tg)超过332℃,10%热失重温度为530～537℃。溶液浇铸法制备的聚酰亚胺薄膜具有高光学透明性,UV截止波长为312～366 nm,80%透过率波长为382～436 nm。该薄膜的拉伸强度为60.5～84.7 MPa,弹性模量为1.7～2.4 GPa,断裂伸长率为5.9%～10.2%。
A series of novel polyimides(PIs) were synthesized from 3,3',5,5'-tetramethyl-4,4'-diaminophenyl-4''-methyltoluene(BAMPM) with pyromellitic dianhydride(PMDA), biphenyl tetracarboxylic dianhydride(BPDA), oxydiphthalic anhydride(ODPA), hexafluoro dianhydride(6 FDA) via conventional one-step high temperature polycondensation. The obtained PIs showed excellent solubility in common organic solvent. The glass transition temperature(Tg) of the polymers were beyond 332℃ and 10% weight loss temperatures were within the range of 530～537℃. The thin films of PIs obtained by solution casting showed high optical transparency with the UV cutoff wavelength from 312 nm to 366 nm and the 80% transparency wavelength between 382～436 nm. The films showed the mechanical properties with tensile strength of 60.5～84.7 MPa, Young's modulus of 1.7～2.4 GPa, elongation at break of 5.9%～10.2%.
A series of novel polyimides(PIs) were synthesized from 3,3',5,5'-tetramethyl-4,4'-diaminophenyl-4''-methyltoluene(BAMPM) with pyromellitic dianhydride(PMDA), biphenyl tetracarboxylic dianhydride(BPDA), oxydiphthalic anhydride(ODPA), hexafluoro dianhydride(6 FDA) via conventional one-step high temperature polycondensation. The obtained PIs showed excellent solubility in common organic solvent. The glass transition temperature(Tg) of the polymers were beyond 332℃ and 10% weight loss temperatures were within the range of 530～537℃. The thin films of PIs obtained by solution casting showed high optical transparency with the UV cutoff wavelength from 312 nm to 366 nm and the 80% transparency wavelength between 382～436 nm. The films showed the mechanical properties with tensile strength of 60.5～84.7 MPa, Young's modulus of 1.7～2.4 GPa, elongation at break of 5.9%～10.2%.
引文
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[10]Mehdipour-Ataei S,Sarrafi Y,Hatami M.Novel thermally stable polyimides based on flexible diamine:Synthesis,characterization,and properties[J].European Polymer Journal,2004,40(9):2 009-2 015.
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[15]Li T Y,Huang H H,Wang L,et al.High performance polyimides with good solubility and optical transparency formed by the introduction of alkyl and naphthalene groups into diamine monomers[J].RSC Advances,2017,7(65):40 996-41 003.
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[17]Liaw D J,Huang C C,Chen W H,et al.Color lightness and highly organosoluble fluorinated polyamides,polyimides and poly(amide-imide)s based on noncoplanar 2,2'-dimethyl-4,4'-biphenylene units[J].Polymer,2006,47(7):2 337-2 348.
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[21]Liu C,Pei X,Huang X,et al.Novel non-coplanar and tertbutyl-substituted polyimides:Solubility,optical,thermal and dielectric properties[J].Chinese Journal of Chemistry,2015,33(2):277-284.
[22]Huang X,Mei M,Liu C,et al.Synthesis and characterization of novel highly soluble and optical transparent polyimides containing tert-butyl and morpholinyl moieties[J].Journal of Polymer Research,2015,22(9):169-177.
[23]Huang X,Pei X,Wang L,et al.Design and synthesis of organosoluble and transparent polyimides containing bulky substituents and noncoplanar structures[J].Journal of Applied Polymer Science,2016,133(14):3 266-3 275.