TY  - JOUR
A1  - Heinze, D.
A1  - Mang, Thomas
A1  - Popescu, C.
A1  - Weichold, O.
T1  - Effect of side chain length and degree of polymerization on the decomposition and crystallization behaviour of chlorinated poly(vinyl ester) oligomers
JF  - Thermochimica Acta
N2  - Four members of a homologous series of chlorinated poly(vinyl ester) oligomers CCl₃–(CH₂CH (OCO(CH₂)ₘCH₃))ₙ–Cl with degrees of polymerization of 10 and 20 were prepared by telomerisation using carbon tetrachloride. The number of side chain carbon atoms ranges from 2 (poly(vinyl acetate) to 18 (poly(vinyl stearate)). The effect of the n-alkyl side chain length and of the degree of polymerization on the thermal stability and crystallization behaviour of the synthesized compounds was investigated.

All oligomers degrade in two major steps by first losing HCl and side chains with subsequent breakdown of the backbone. The members with short side chains, up to poly(vinyl octanoate), are amorphous and show internal plasticization, whereas those with high number of side chain carbon atoms are semi-crystalline due to side-chain crystallization. A better packing for poly(vinyl stearate) is also noticeable. The glass transition and melting temperatures as well as the onset temperature of decomposition are influenced to a larger extent by the side chain length than by the degree of polymerization. Thermal stability is improved if both the size and number of side chains increase, but only a long side chain causes a significant increase of the resistance to degradation. This results in a stabilization of PVAc so that oligomers from poly(vinyl octanoate) on are stable under atmospheric conditions. Thus, the way to design stable, chlorinated PVEs oligomers is to use a long n-alkyl side chain.
Y1  - 2016
U6  - https://doi.org/10.1016/j.tca.2016.05.015
SN  - 0040-6031 (electronic)
VL  - 637
SP  - 143
EP  - 153
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hager, Jonathan
A1  - Hentschke, Reinhard
A1  - Hojdis, Nils
A1  - Karimi-Varzaneh, Hossein Ali
T1  - Computer Simulation of Particle–Particle Interaction in a Model Polymer Nanocomposite
JF  - Macromolecules
Y1  - 2015
U6  - https://doi.org/10.1021/acs.macromol.5b01864
SN  - 1520-5835
VL  - 48
IS  - 24
SP  - 9039
EP  - 9049
ER  - 
TY  - CHAP
A1  - Sauerborn, Markus
A1  - Liebenstund, Lena
A1  - Raue, Markus
A1  - Mang, Thomas
A1  - Herrmann, Ulf
A1  - Dueing, Andreas
T1  - Analytic method for material aging and quality analyzing to forecast long time stability of plastic micro heliostat components
T2  - AIP Conference Proceedings
Y1  - 2017
U6  - https://doi.org/10.1063/1.4984388
VL  - 1850
IS  - 1
SP  - 030045-1
EP  - 030045-8
ER  - 
TY  - JOUR
A1  - Mayer, Jan
A1  - Hentschke, Reinhard
A1  - Hager, Jonathan
A1  - Hojdis, Nils
A1  - Karimi-Varnaneh, Hossein Ali
T1  - A Nano-Mechanical Instability as Primary Contribution to Rolling Resistance
JF  - Scientific Reports
Y1  - 2017
SN  - 2045-2322
VL  - 7
IS  - Article number 11275
PB  - Springer
CY  - Berlin
ER  -