Preparation and Properties of a Modified Fe2O3 Pigment for Dope Dyeing Ultrahigh Molecular Weight Polyethylene (UHMWPE) Fibers by Melt Spinning was written by Wang, Xiaochun;Zhang, Liping;Liu, Ming;Zhang, Jianfei;Zhao, Guoliang. And the article was included in Fibers and Polymers in 2021.Reference of 6683-19-8 This article mentions the following:
The poor compatibility between a Fe2O3 pigment and a blend of ultrahigh mol. weight polyethylene (UHMWPE)/polyolefin (PO) can result in low spinnability and poor mech. properties of the resulting fiber. This study modifies the surface of a Fe2O3 pigment with a titanate coupling agent for dope dyeing melt-spun UHMWPE fiber. The effects of the coupling agent dose, reaction temperature and reaction time on the surface properties of the pigments are investigated. In addition, the characteristics of the UHMWPE blend and colored fibers (by dope dyeing with modified and unmodified Fe2O3 pigments) are compared. Notably, 3 weight% coupling agent in regard to the pigments mass, a coupling agent to toluene mass ratio of 1:5, a reaction time of 30 min, and a reaction temperature of 80°C achieve the optimal results, which are a 48.4% lipophilic degree of the modified pigment, a zeta potential of 48.4 mV, and a contact angle of 144.3°. Moreover, SEM images and torque results of the blend melt show that the compatibility between the Fe2O3 pigment and UHMWPE/PO blend is significantly enhanced. With an increasing pigment content, the mech. properties of the colored fibers decrease, and the K/S values of the colored fibers increase. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Reference of 6683-19-8).
2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Reference of 6683-19-8
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics