Extension of theory of growth of chain-folded polymer crystals to large undercoolings

Journal of Applied Physics

Volumn 44, Issue 10, 1973, Pages 4340-4352

  Lauritzen Jr , John I ^a   Hoffman, John D ^a  

^a NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

POLYMERS;

EID: 0015672949     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1661962     Document Type: Article

References (27)

1. a more general model, one can denote the φ value for the first step as [formula omitted] in Eqs. (12) and (13), and use a different value [formula omitted] for all other steps in Eqs. (15)–(17). The assumption used in constructing Eqs. (15)–(17) is equivalent to setting [formula omitted] and gives [formula omitted] This allows Eq. (19) to be directly integrated to get [formula omitted] and [formula omitted] in closed form as Eqs. (21) and (23). The value of φ for the first step uniquely controls [formula omitted] and numerical calculations show that it only makes a rather small difference in [formula omitted] and [formula omitted] if all the subsequent steps have a φ differing from that of the first step.
2. The value of [formula omitted] for polystyrene (PS) in dimethylphthalate was estimated by assuming a parallelism between [formula omitted] for polyethylene (PE) in xylene and [formula omitted] for PS. Correcting for the difference in absolute temperature as [formula omitted] we find [formula omitted] for PS to be [formula omitted] giving the estimate [formula omitted]