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2.145 Aktuelle Fachpublikationen zum Thema temperature

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Synthesis via ATRP, kinetics study and characterization (molecular‐morphological) of 3‐Arm star diblock copolymers of the (PS‐b‐P2VP)3 type

18.10.2014 | George Polymeropoulos, Dimitrios Moschovas, Anastasia Kati, Apostolos Karanastasis, Styliani Pelekanou, Panagiotis C ..., Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT The synthesis of five homopolymers (PS)3 and the corresponding diblock copolymer 3‐arm stars of the (PS‐b‐P2VP)3 type is reported through atom transfer radical polymerization. Such star homo‐ and copolymers are prepared without any addition of solvent (bulk polymerization). The ...

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RAFT polymerization kinetics and polymer characterization of P3HT rod–coil block copolymers

18.10.2014 | Melissa R. Kern, Stephen G. Boyes, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Here an in‐depth analysis of reversible addition–fragmentation chain transfer (RAFT) polymerization kinetics is reported in order to provide better definition of poly(3‐hexylthiophene) (P3HT) rod–coil block copolymers thru a more thorough understanding of the RAFT polymerization of ...

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Thieno[3,2‐b]thiophene‐substituted benzodithiophene in donor–acceptor type semiconducting copolymers: A feasible approach to improve performances of organic photovoltaic cells

18.10.2014 | Ji‐Hoon Kim, Hee Su Kim, Jong Baek Park, In‐Nam Kang, Do‐Hoon Hwang, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Thieno[3,2‐b]thiophene‐substituted benzo[1,2‐b:4,5‐b′]dithiophene donor units (TTBDT) serve as novel promising building blocks for donor–acceptor (D‐A) copolymers in organic photovoltaic cells. In this study, a new D‐A type copolymer (PTTBDT‐TPD) consisting of TTBDT and ...

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Synthesis of Pyridine Chitosan and its Protonic Conductivity

18.10.2014 | Yingxin Deng, Brett A. Helms, Marco Rolandi, Journal of Polymer Science Part A: Polymer Chemistry, 2014

The synthesis of a positively charged and water soluble chitosan derivative from chitosan is presented.

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Polycondensation of H3PO4 with glycerol: From branched structures to hydrolytically reversible gels

13.10.2014 | Julia Pretula, Krzysztof Kaluzynski, Ryszard Szymanski, Stanislaw Penczek, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Direct polycondensation of glycerol (GL) and phosphoric acid (PA) has been studied for the first time. Reactions were performed at 100 °C–120 °C, and in spite of the formally A3 + B3 process soluble poly(glycerol phosphates) could be obtained up to the high conversions. This behavior ...

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Synthesis and stability of BODIPY‐based fluorescent polymer brushes at different pHs

11.10.2014 | Dilek Cimen, Talya Tugana Kursun, Tuncer Caykara, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT We report a simple strategy for the grafting of poly(methacrylic acid) [poly(MAA)] brushes from silicon substrate by surface‐initiated RAFT polymerization and the subsequent coupling of BODIPY to these brushes to render them fluorescent. The poly(MAA) brushes were first generated by ...

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Amphiphilic dendritic copolymers of tert‐butyl‐glycidylether and glycidol as a nanocontainer for an anticancer ruthenium complex

08.10.2014 | Marcin Libera, Petr Formanek, Leonard Schellkopf, Barbara Trzebicka, Andrzej Dworak, Manfred Stamm, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Dendritic copolymers comprising a hydrophobic core and hydrophilic shell with nearly equal numbers of hydroxyl groups in the shell and different densities in the core were prepared by a multi‐step process based on anionic ring‐opening polymerization. The diversity in the core density ...

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Ionic liquids as reactive additives for the preparation and modification of epoxy networks

07.10.2014 | Thi Khan Ly Nguyen, Sébastien Livi, Sébastien Pruvost, Bluma G. Soares, Jannick Duchet‐Rumeau, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT In this study, epoxy‐networked polymeric materials containing tributyl (ethyl) phosphonium diethyl phosphate (CYPHOS®IL169) and trihexyl (tetradecyl) phosphonium bis 2,4,4‐(trimethyl pentyl)‐phosphinate (CYPHOS®IL104) were developed from a mixture of epoxy prepolymer (DGEBA) and ...

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Pyrrolo[3,4‐c]pyrrole‐1,3‐dione‐based large band gap polymers containing benzodithiophene derivatives for highly efficient simple structured polymer solar cells

07.10.2014 | Vellaiappillai Tamilavan, Kyung Hwan Roh, Rajalingam Agneeswari, Dal Yong Lee, Shinuk Cho, Youngeup Jin, Sung Heum P ..., Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Pyrrolo[3,4‐c]pyrrole‐1,3(2H,5H)‐dione (DPPD)‐based large band gap polymers, P(BDT‐TDPPDT) and P(BDTT‐TDPPDT), are prepared by copolymerizing electron‐rich 4,8‐bis(2‐ethylhexyloxy)benzo[1,2‐b:4,5‐b′]dithiophene (BDT) or ...

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Free radical photopolymerization initiated by UV and LED: Towards UV stabilized, tack free coatings

07.10.2014 | Feyza Karasu, Céline Croutxé‐Barghorn, Xavier Allonas, Leendert G.J. Ven, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT UV stabilizers (UV absorbers and Hindered Amine Light Stabilizers‐HALS) are added to UV‐curable formulations to provide long‐term durability. The influence of HALS and the filtering effect of UV absorbers are investigated under UV and LED irradiation by using different photoinitiating ...

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