Time-resolved SAXS/WAXS study of polymer blend crystallization

Josef Baldrian; M. Horky; M. Steinhart; A. Sikora; P. Vlcek; H. Amenitsch; Sigrid Bernstorff

doi:10.1117/12.401838

25 September 2000 Time-resolved SAXS/WAXS study of polymer blend crystallization

Josef Baldrian, M. Horky, M. Steinhart, A. Sikora, P. Vlcek, H. Amenitsch, Sigrid Bernstorff

Author Affiliations +

Proceedings Volume 4240, X-Ray Investigations of Polymer Structures II; (2000) https://doi.org/10.1117/12.401838
Event: X-Ray Investigations of Polymer Structures, 1999, Szczyrk, Poland

Abstract

Time-resolved SAXS and SAXS/WAXS experiments were exploited to monitor the development of lamellar microstructure and crystallinity in neat poly(ethylene oxide) (PEO) and its blends with melt-miscible amorphous poly(methyl methacrylate) (PMMA). The low-molecular-weight fractions of PEO (Mw 3000) and of PMMA (Mw 1170, 3100, 3950) were used. Such PEO fraction crystallizes in the lamellae with extended (EC) or integrally folded (IF) chains. It has been found that in early stages of crystallization, transient NIF lamellae of PEO were formed in a wide range of compositions and temperatures similarly to the situation in neat PEO. Subsequent transformation of these lamellae into the lamellae with once-folded chains (1F) or EC occurred through isothermal thickening and thinning. The amorphous diluent has played a decisive role in structure development. The thickening prevailed in blends with high contents and high molecular weight of PMMA and at high crystallization temperature, the induction time of crystal formation increased, whereas the rates of NIF, 1F and EC crystallization and at the start and rate of the NIF structure recrystallization decreased. The retardation effect of amorphous diluent on the kinetics of these processes resulted in tendency to form gradually more stable and more perfectly ordered lamellar structures.

Citation Download Citation

Josef Baldrian, M. Horky, M. Steinhart, A. Sikora, P. Vlcek, H. Amenitsch, and Sigrid Bernstorff "Time-resolved SAXS/WAXS study of polymer blend crystallization", Proc. SPIE 4240, X-Ray Investigations of Polymer Structures II, (25 September 2000); https://doi.org/10.1117/12.401838

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE