The controlled cationic copolymerizations of isobutylene (IB) with alkenyl styrenes including 4-allylstyrene, p-(3-butenyl)-styrene and p-(5-hexenyl)-styrene were carried out in n-hexane/CH2Cl2 (6/4 v/v) at −80 °C using a t-BuCl/FeCl3/iPrOH initiating system.
A novel low-k material (Dk is as low as 2.23) was prepared from functionalized 4-tert-butylcalix[4]arene with different numbers of benzocyclobutene (BCB) units (2 or 4) and spacers (–(CH2)3– or –(CH2)6–).
The granular alterations and microstructural disruption associated with high hydrostatic pressure-induced gelatinisation of starches in cassava flour reduced its ability to bind volatiles but it remained stable during storage.
Experimental and theoretical rate coefficients for unimolecular reactions of gas-phase unsaturated organic peroxy radicals (RO2) are in excellent agreement. But the observed products question their contributions to autoxidation in Earth’s atmosphere.
Major advances have recently been made in understanding the biosynthesis and emission of floral volatiles, how their emission is shaped by abiotic and biotic factors, and which volatiles are involved in communicating with mutualists and parasites.