Chapter 1 is an introduction to the hierarchy in block copolymer self-assembly from a bottom up approach. To begin with, the control at each hierarchical level is introduced and the influences are reviewed. This chapter is concluded by reviewing some techniques to understand self-assembled block copolymers and the applications from bottom up self-assembly of block copolymers is presented. Chapter 2 reports the synthesis of a range of amine homopolymers and copolymers by RAFT polymerisation. These amino polymers are then explored further as lubricant additives and their solution self-assembly in non-polar media is explored. Chapter 3 investigates the performance of the amino polymers from Chapter 2 as ashless detergents in lubricant formulations using a range of industrial testing methods. Chapter 4 reports the synthesis and self-assembly of a range of pH responsive P(DMAEMA-co-DEAEMA)-b-PDMAEMA diblock copolymers, where the composition of the P(DMAEMA-co-DEAEMA) block was varied by copolymerisation, in aqueous solution studied by a range of scattering methods and microscopy. Chapter 5 reports the initial copolymer blending method protocol, here two P(DMAEMA-co-DEAEMA)-b-PDMAEMA diblock copolymers with varying P(DMAEMA-co-DEAEMA) block compositions are blended together. The structures formed on the nanoscale are analysed and further compared to the structures formed by a pure P(DMAEMA-co-DEAEMA)-b-PDMAEMA diblock copolymer with the same composition as the blend. Chapter 6 reports on the extension of the copolymer blending method protocol, here a range of neutral polymers and different self-assembly pathways are explored and the structures formed are analysed by detailed light scattering techniques and cryo-TEM.