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- W2067089080 abstract "Within the wealth of hydrocarbon polymers, poly(p-phenylene alkylene)s (“alkarotics”) hold a special position since they have been a long forgotten class of hydrophobic polymers. This is somewhat surprising, since the cornerstones of this polymer family cover extremely broad materials properties and the few known representatives attract attention with very favorable characteristics. In the course of this article, four new representatives of this family are presented. Whereas poly(p-phenylene octylene) (PPPO; 90°C), poly(p-phenylene hexylene) (PPPH; 120°C) and poly(p-phenylene propylene) (PPPPr; 110–130°C) have surprisingly low melting temperatures, the highly crystalline poly(p-phenylene butylene) (PPPB), melting between 200 and 225°C, meets many of the requirements that are essential for a novel, hydrophobic, processable, engineering polymer. In connection with the efforts to tailor the melting temperature of these polymers, a simple, semi-empirical methodology to estimate melting temperatures of unknown representatives of homologous series of polymers was developed and verified. By means of this approach, the melting temperatures of PPPH and PPPB could be predicted with remarkable accuracy. In addition, it was shown that the method is not restricted to the present alkarotic polymers, but it seems to have a rather broad range of applications as shown by the successful description of the polymer series, including various liquid-crystalline hydrocarbon polymers and different polyamides." @default.
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- W2067089080 date "2000-05-01" @default.
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- W2067089080 title "Poly(p-phenylene alkylene)s – A forgotten class of polymers" @default.
- W2067089080 doi "https://doi.org/10.1002/(sici)1521-3927(20000501)21:8<405::aid-marc405>3.0.co;2-j" @default.
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