7.1 General Conclusions Investigations of the crystallization and melting behavior of linear polyethylene and of a series of ethylene/styrene random copolymers with styrene content ranging from 0.35 mol% to 11.7 mol% were discussed in chapters 3, 4 and 5 using the techniques of DSC and temperature modulated calorimetry. The focus of these studies was placed on the correlations between the tempo...

The crystallization kinetics of Zr58.5Nb2.8Cu15.6Ni12.8Al10.3 were studied in an electrostatic levitation ~ESL! apparatus. The measured critical cooling rate is 1.75 K/s. Zr58.5Nb2.8Cu15.6Ni12.8Al10.3 is the first bulk-metallic-glass-forming liquid that does not contain beryllium to be vitrified by purely radiative cooling in the ESL. Furthermore, the sluggish crystallization kinetics enable th...

The present study explores the temperature and time dependence of heterogeneous (HET) crystal nucleation in a lithium disilicate glass using the stochastic approach. In particular, a single lithium disilicate sample was repeatedly (284 runs) undercooled to 1173K in a PtRh-crucible and the crystallization onset time during an isothermal hold was detected in each run. The statistical distribution...

Experiments show high-speed spinning of many synthetic bers is accompanied by the partial crys-tallization of the initially amorphous melt. This crystallization is induced by some combination of the extensional ow, molecular orientation and extension, and temperature dependence. The crystallization of the material couples back to aaect the ber rheology, through a process of stress-hardening. Re...

The influence of conventional and accumulative HPT (Acc. HPT) process on structural properties Zr62Cu22Al10Fe5Dy1 metallic glass (MG) phase is examined by X-ray diffraction (XRD) technique. XRD results showed that leads to free volume generation in MG. Free increases with the number anvil turns process, while highest increment was observed Acc. process. To understand role latent crystalline pha...

This work investigates the crystallization kinetics and thermal stability of a new melt processable semicrystalline polyimide (Tg= ca. 210°C, Tm= ca. 395°C) based on 1,3bis(4-aminophenoxy) benzene (TPER) and 3,3’,4,4’-biphenyltetracarboxylic dianhydride (BPDA), and endcapped with phthalic anhydride (PA). Earlier studies have demonstrated that this polymer is a strong candidate as a structural a...