[2PS-166]
A New Spin on Tradition: Spiroglycol-based Structural Modification of Poly(butylene terephthalate)
발표자이진영 (충남대학교)
연구책임자구준모 (충남대학교)
Abstract
Poly(butylene terephthalate) is widely used across industries due to its excellent mechanical performance, and rapid crystallization enables short molding cycles. However, high shrinkage, low transparency, and a relatively low glass transition temperature (Tg) can limit applications. PBT is therefore traditionally compounded with reinforcements, while Tg improvement in neat PBT remains clearly limited. In this study, spiroglycol (SPG) was used as a comonomer. SPG units (≤36 mol%) were incorporated into the PBT backbone via esterification and polycondensation to produce poly(butylene-co-spirocyclic terephthalate) (PBST). The bulky, non-planar spirocyclic structure reduces crystallinity and moderates the crystallization rate of PBT. It also offers advantages such as increased Tg, transparency, and enhanced processability. Furthermore, the acetal bonds in SPG are cleavable under mild acidic conditions, enabling control over the decomposition rate.