Effect of molecular weight on the structure and crystallinity of poly (3-hexylthiophene). (Record no. 52603)

MARC details
000 -LEADER
fixed length control field 02520nam a2200265Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field MX-MdCICY
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250625162412.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-18451
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 250602s9999 xx |||||s2 |||| ||und|d
245 10 - TITLE STATEMENT
Title Effect of molecular weight on the structure and crystallinity of poly (3-hexylthiophene).
490 0# - SERIES STATEMENT
Volume/sequential designation Macromolecules, 39(6), p.2162-2171, 2006
520 3# - SUMMARY, ETC.
Summary, etc. Recently, two different groups have reported independently that the mobility of field-effect transistors made from regioregular poly(3-hexylthiophene)(P3HT)increases strongly with molecular weight. Two different models were presented:? one proposing carrier trapping at grain boundaries and the second putting emphasis on the conformation and packing of the polymer chains in the thin layers for different molecular weights. Here, we present the results of detailed investigations of powders and thin films of deuterated P3HT fractions with different molecular weight. For powder samples, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and X-ray diffraction (XRD)were used to investigate the structure and crystallization behavior of the polymers. The GPC investigations show that all weight fractions possess a rather broad molecular weight distribution. DSC measurements reveal a strong decrease of the crystallization temperature and, most important, a significant decrease of the degree of crystallinity with decreasing molecular weight. To study the structure of thin layers in lateral and vertical directions, both transmission electron microscopy (TEM)and X-ray grazing incidence diffraction (GID)were utilized. These methods show that thin layers of the low molecular weight fraction consist of well-defined crystalline domains embedded in a disordered matrix. We propose that the transport properties of layers prepared from fractions of poly(3-hexylthiophene)with different molecular weight are largely determined by the crystallinity of the samples and not by the perfection of the packing of the chains in the individual crystallites.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element CRYSTALLINITY
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element POLY(3-HEXYLTHIOPHENE
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Zen, A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Saphiannikova, M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Neher, D.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Grenzer, J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Grigorian, S.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Pietsch, U.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Wegner, G.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/16qZirinOMzZv6UvTAathdlp0AW_A7LBh/view?usp=drivesdk">https://drive.google.com/file/d/16qZirinOMzZv6UvTAathdlp0AW_A7LBh/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme Clasificación local
Koha item type Documentos solicitados
Holdings
Lost status Source of classification or shelving scheme Damaged status Not for loan Collection Home library Current library Shelving location Date acquired Total checkouts Full call number Date last seen Price effective from Koha item type
  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-18451 25.06.2025 25.06.2025 Documentos solicitados