Structure and properties of nucleated polypropylene fibres

Abstract

This work is focused on the evaluation of the structure and properties of the nucleated polypropylene (PP) fibres prepared by melt spinning technique at lower take-up velocities as pre-oriented fibres (POY) containing 0.3–1.5 wt. % of additives - nucleating agents like 1,3:2,4-dibenzylidene sorbitol (DBS), quinacridone (QA) and calcium carbonate (CC). The thermal properties of nucleated PP fibres were determined by using differential scanning calorimetry (DSC). Used additives promote nucleation activity, DBS and QA better than CC, as they increased the crystallization temperature to higher extent than CC. Effect of CC seems to be negligible, due to very little impact on melting point and crystallization temperature. Morphological characteristic of the PP fibres were observed by means of scanning electron microscopy. The morphology of nucleated PP is different significantly from that of reference non-nucleated PP fibre. The measured values of the above mentioned properties were compared with parameters of non-nucleated PP fibre prepared under same technological conditions.

LLDPE film development surface with nucleating agents to reduce fat stains from food adherence on the film surface for easy rinsing before recycling

“…Furthermore, it was discovered that LLDPE/0.25%wt calcium carbonate/0.25% kaolin (Figure 9(d)) film containing a hybrid nucleating agent offered extremely excellent outcomes when rinsed with water one time, revealing that fat stains could be easily removed. The interaction between the two nucleating agents could create different crystals [23], increasing fat stains rinsing from the film. Therefore, the crystals on the film surface, the narrow gap between the roughness on the surface, and the high contact angle can aid in rinsing fat stains from the film surface.…”