X‐ray studies of structural changes on swelling in the system poly(2,6‐dimethyl‐1,4‐phenylene)oxide/decalin

Abstract

The system PPO/decalin was invastigated by wide-angle X-ray diffraction method. The polymer was used in i t s powder form. The experimental conditions were chosen to obtain maximum swelling of samples. I t was observed that ordering changes were taking place in a relatively short period of time after swelliiig. The degree of ordering was calculated for the swollen and dried samples. The observed relationships allowed conclusion concerning the influence of the swelling agent and conditions on the morphological changes in the studied system. Kontgenographische Untersuchung der strukturelleii ;hderurigeii irn System I'o1y(2,6-dirnelhyl-.f,4-pherc yleti)oxid/Deculin wahrend des QuellungsprozessesDas System PPO/Decalin wurde niittels Riintgeirweitwinkelstreuung untersucht. Das Polymer wurde in Pulverhrm eingesetzt, und die experimentellen Bedingungen wurden so gewiihlt, dalj maximale Quellung auftrat. Die Anderungen der Ordnung erfolgen in relativ kurzer Zeit. Der Ordnungsgrad der gequollenen ur,d der getrockneten Proben wurde berechnet. Aus. den EJgebnissen konnen SchluBfolgerungen iiber den KinfluD des Quellrnittels und der Quellbedingungen auf morphologische Anderungen in dem untersuchten System gezogen werden. Penmzenozpa$usecicue uccnedoeanus U~J C~H~H U R cmpyicmypbc e cucmeJue nonu(2,6-auflernun-1 ,4-$enunen)oiccuddeicaaun eo @ p e a s npoqecca na6yxanus

X‐ray studies of crystallization of poly(2,6‐dimethyl‐1,4‐phenylene oxide) on swelling in certain systems

“…The unit cell dimensions obtained for this polymer [l, 21 indicate the complexity of the crystallization process. In these processes, particularly during swelling [3], it was also noticed that there is a good parallelism concerniug the processes and the resultiiig ordered structures. However, the volume of the unit cell obtained in the second case is around 0.1 nm3 less than the one in the first case.…”

“…To get such structures, we decided to investigate the PPO-decalin system in the swelling process a t various temperatures, higher than the one applied previously [3]. This could enable a precise estimation of the position of interference peaks.…”