Vol. 40 No Journal of Jiangxi Normal University Natural Science Jul. 2016

HTML
DOWNLOAD

Μέγεθος: px

Εμφάνιση ξεκινά από τη σελίδα:

Download "Vol. 40 No Journal of Jiangxi Normal University Natural Science Jul. 2016"

Αφροδίσια Ζερβός
6 χρόνια πριν
Προβολές:

1 40 4 Vol 40 No Journal of Jiangxi Normal University Natural Science Jul $ 4 4'- TDPA BAPB 2 PAA 4 TDPA /BAPB PI FT-IR WAXD DSC TGA PI FT-IR 4 WAXD DSC TDPA /BAPB PI T m 363 ~ 370 TGA / PI 3 DMSO NMP PAA PI MPa 2 5 GPa 4 4' TQ A DOI /j cnki issn '- TDPA IDPA PI PI TDPA BAPB PAA PI PI T m 363 ~ 1-3 PI 370 NMP PI 4-6 Aurum 7 1 Aurum Aurum 3 3' 4 4'- 1 1 BPDA BAPB '- TDPA BAPB Aurum m p 115 ~ 118 C N N- DMAc 11 BAPB Py PI NASA IDPA PI BAB KJLD13023 KF

2 h η inh TDPA-PAA PAA DMAc PI g dl ± PI 0 6 ~ 0 7 mm PAA DMAc AVA-TAR370 10% PAA 5 ml KBr h 400 ~ cm - 1 X- 120 WAXD Bruker-XRF X- Cu Kα 24 h PI-1 PAA 40 kv /30 ma 2θ 5 ~ 90 4 ml / 2 /1 DSC TA-Q h 10 K min ~ 400 N TGA TA-CDR-1 24 h PI-2 PAA 20 ~ min - 1 CMT h GB /T h 1 3 PI PI PAA N 2 PI ml g mol BAPB 25 ml DMAc g mol TDPA 30 min 20 7 ~ 8 h PAA PI 2 1 PAA PI TDPA PI PAA 2 ~ 3 h 22 TDPA BAPB PI PAA PAA 1 PAA PPAs η inh 6 h h h Polymer code PI-1 PI-2 PI-3 PI h h h h η inh / dl g PI-4 PAA PI Scheme 1 Scheme 1 PIs

3 PI PI FT-IR 1 PI cm cm - 1 C O cm - 1 C N 715 cm - 1 C O PAA PI-1 PI cm cm - 1 PI-2 PI-4 FT-IR 2 2 Characteristic absorption peak 2 PIs FT-IR 2 PIs FT-IR cm - 1 C O C N O H / N H PI PI PI PI PIs WAXD 2 4 PI DSC 31 DSC 3 4 PI TD- PA 134BAPB PI WAXD T m ~ DSC 4 DSC 1 PI-1 PI-2 PI-3 T g PI-4 T g 30 PI PI T-PI-4 T g 2 3 X- X- WAXD 2 PI WAXD PI X PI-1 % = 29 3% X PI-2 % = 30 2% X PI-3 % = 27 1% X PI-4 % = 25 2% / 3 PIs 1 DSC PI 5 3 PI T d PI-1 < PI-3 < PI-4 < PI-2 PAA /

4 PIs 2 DSC 5 PIs TGA 3 PIS Polymer code T m / T g / T d / T 5 / T 10 / R w /% PI PI PI PI T d Onset temperature of degradation T 5 Temperature at 5% weight loss T 10 Temperature at 10% weight loss R W Residual weight at 800 in N PI PAA PI TDPA /BAPB PAA PI MPa 7 0% 2 5 GPa PI 20 mg PI 2 ml 4 PI PI-2 DMSO NMP 6 T-PI-4 4 PIs Polymer code DMSO NMP DMF DMAc THF m-cresol v Phenol v tetrachloroethane = 1 1 H 2 SO 4 98% PI PI PI PI Symbols + + soluble at room temperature + soluble on heating - - insoluble DMAc PAA / PAA TDPA BAPB PI T g T m T d

5 4 419 PI TDPA /BAPB T m 365 J PI '- J PI MPa % 25 GPa T g Chin Ping Yang Sheng Huei Hsiao Ching Der Chen Preparation andproperties of polyamide-imides derived from 1 T d / 3-bis 4-aminophenoxy benzene trimellitic anhydride PI and various aromatic diamines J Journal of Polymer Research PI 13 Rattaa V Ayambemb A Younga R et al Thermal stability crystallization kinetics and morphology of a new semic- PAA PI TDPA /BAPB PI rystalline polyimide based on 1 3-bis 4-aminophenoxy benzene and 3 3' 4 4'-biphenyltetracarboxylic dianhydride J Polymer FPC J J Ghosh M K Mittal K L Polyimides fundamental and applications M New York Marcel Decker Ding Mengxian Polyimides chemistry relationship between structure and properties and materials M Beijing Science Press J Trends Polym Sci Gong Shiming Liu Ming Xia Senlin Synthesis of novel soluble polyimides containing triphenylamine groups for liquid crystal vertical alignment layers J J Polym Res Yu-Sheng Hsieh Chii-Rong Yang Guang-Yeu Hwang Preparation oforganic soluble polyimides and their applications in KrF E xcimer laser LIGA process J Macromol Chem Phys Ohta M Yoshikawa M Polyimides process for the preparation thereof and polyimide resin compositions P US Kuroki T Sakata Y Okumura T et al Crystallinepolyimide for melt molding with satisfactory thermal stability P US M '- 16 Zhang Jiaoqiang Gao Hongxu Ji Tiezheng et al Synthesis and thermal behaviors of 1 3-bis 4-aminophenoxy benzene TPER and polyimide based on TPER and pyromellitic dianhydride J J Therm Anal Calorim / 17 TDPA J J Huang S J Hoyt A E The synthesis of soluble polyimides 18 Progar D J Clair T L S T Pratt J R Thermoplastic adhesices based on 4 4'-isophthaloyl-diphthalic anhydride IDPA J NASA Technical Memorandum Pratt J R Blackwell D A Clair T L S T 4 4'-Isophthaloyidiphthalic anhydride polyimides J Polymer Engineering & Science Donald J Terry L St Clair Richard Pratt J Thermoplastic adhesives based on 4 4'-isophthaloyl diphthalic anhydride IDPA J NASA TM '- P CN X J

6 The Review of Nitrogen and Phosphorus Pollution in Poyang Lake Water CHEN Bo 1 2 WANG Peng 1 2* ZHANG Hua Key Laboratory of Poyang Lake Wetland and Watershed Research Ministry of Education Jiangxi Normal University Nanchang Jiangxi China 2 College of Geography and Environment Jiangxi Normal University Nanchang Jiangxi China Abstract The pollution status and development trend of nutrient in Poyang Lake water are reviewed The results show that the concentration of total nitrogen TN in Poyang Lake increased rapidly in 1990s while the increasing trend slowed down after the year 2000 The concentration of total phosphorus TP has no obvious trend The seasonal variations of TN and TP content follow the trend the dry season > the normal season > the wet season The pollution is relatively heavy in the eastern and southern parts of the lake and relatively light in the western and northern part River input is a major source of nitrogen and phosphorus loading to the lake the maximal percentage is Ganjiang while the Xiuhe is the minimal However it should be noted that there are some limitations in the field sampling frequency the data sharing mechanism and the migration and transformation mechanisms of nitrogen and phosphorus Key words Poyang Lake nitrogen phosphorus pollution source migration and transformation 419 The Synthesis and Characterization of Novel Thermoplastic Polyimide Based on Diketone Anhydride HU Shuncheng CHEN Zhiqiang HONG Huiming WANG Liyun SONG Caisheng SONG Cheng * College of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang Jiangxi China Abstract A novel diketone anhydride polyimide PI was synthesized from 4 4'-terephthaloyldiphthalic anhydride TDPA and 1 3-bis 4-aminophenoxy benzene BAPB by two-step polycondensation Polyamic acids PAAs of high molecular weight were obtained and PIs were synthesized from PAAs by four different imide methods The structures and physical properties of PIs were characterized by FTIR DSC TGA WAXD an universal testing machin for stress-strain behaviour Each method can make PAA transform into PI in DSC and WAXD the TDPA / BAPB PIs appeared partly crystallized and melted at 363 ~ 370 In TGA the PI by imidization from acetic anhydride and pyridine showed the best thermostability its solubility were better than other three PIs that was soluble in polar organic solvents as dimehtylsulfoxide DMSO N-methyl-2-pyrrolidone NMP m-cresol et al The PAA could be processed into good quality film the PI film possessed excellent mechanical property a high tensile strength MPa and modulus 2 5 GPa Key words 4 4'-terephthaloyldiphthalic anhydride 1 3-bis 4-aminophenoxy benzene polyimide imidization properties

Σχετικά έγγραφα

Vol. 39 No Journal of Jiangxi Normal University Natural Science Mar TDPA. A DOI /j. cnki. issn

Vol. 39 No Journal of Jiangxi Normal University Natural Science Mar TDPA. A DOI /j. cnki. issn 39 2 Vol 39 No 2 2015 3 Journal of Jiangxi Normal University Natural Science Mar 2015 1000-5862 2015 02-0154-05 TDPA * 330022 4 4 - TDPA MPD PA 2 PI FT-IR WAXD DSC TGA FT-IR 2 PAA DSC TGA PI PI T g 280