Struct GlassTransition 

pub struct GlassTransition {
    pub t_ref: f64,
    pub c1: f64,
    pub c2: f64,
    pub t_g: f64,
}

Glass transition temperature model using the WLF equation.

log₁₀(a_T) = -C₁*(T - T_ref) / (C₂ + (T - T_ref))

Fields

t_ref: f64

Reference temperature T_ref [K]

c1: f64

WLF constant C₁ (dimensionless)

c2: f64

WLF constant C₂ [K]

t_g: f64

Glass transition temperature T_g [K]

Implementations

impl GlassTransition

pub fn new(t_g: f64, t_ref: f64, c1: f64, c2: f64) -> Self

Create glass transition model with WLF parameters.

Universal constants at T_g: C₁ = 17.44, C₂ = 51.6 K.

Arguments

• t_g - Glass transition temperature [K]
• t_ref - Reference temperature [K] (often = T_g)
• c1 - WLF C₁ constant (default 17.44)
• c2 - WLF C₂ constant [K] (default 51.6)

pub fn log_shift_factor(&self, temperature: f64) -> f64

WLF shift factor log₁₀(a_T) = -C₁*(T-T_ref)/(C₂+(T-T_ref)).

pub fn shift_factor(&self, temperature: f64) -> f64

Shift factor a_T = 10^(log₁₀(a_T)).

pub fn is_rubbery(&self, temperature: f64) -> bool

Check if temperature is above glass transition.

pub fn relaxation_time(&self, t_ref_tau: f64, temperature: f64) -> f64

Relaxation time at temperature T relative to reference.