I am having trouble with the subfigures in one main figure. I am using the following preamble and coding for the figures:
\documentclass[11pt]{report}
\usepackage{geometry}
\usepackage{amsmath}
\usepackage{acronym}
\usepackage{times}
\usepackage{amssymb}
\usepackage{mathrsfs}
\usepackage{latexsym}
\usepackage[none]{hyphenat} % no word break
\usepackage{wrapfig}
\usepackage[font={footnotesize,it}]{caption}
\usepackage{url}
\usepackage{titling}
\usepackage{textcomp}
\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\arabic{chapter}.\arabic{section}}
\renewcommand{\thetable}{\arabic{chapter}.\arabic{table}}
\renewcommand{\thefigure}{\arabic{chapter}.\arabic{figure}}
\usepackage{hyperref}
\usepackage{cleveref}
\usepackage{graphics, float}
\usepackage{caption}
\usepackage[pdftex]{graphicx}
\usepackage{epstopdf} %graphics in .eps format
\usepackage{siunitx}
\usepackage{booktabs}
\usepackage{microtype}
\usepackage{subfigure}
\usepackage{subfig}
\usepackage[english]{babel}\addto\captionsenglish
{\renewcommand{\bibname}{References}}
\usepackage[backend=bibtex,style=numeric, sorting=none]{biblatex}
\usepackage{multirow}
\usepackage{textcomp}
\usepackage{csquotes} %Package biblatex Warning: 'babel/polyglossia' detected but 'csquotes' missing.
\usepackage{listings}
\usepackage{babel,blindtext}
%\usepackage[T1]{fontenc}
\geometry{a4paper} % ... or letter or a4paper or a5paper or ... %\usepackage[parfill]{parskip} % Activate to begin paragraphs with an empty line rather than an indent
\DeclareGraphicsRule{.tif}{png}{.png}{`convert #1 `dirname #1`/`basename #1 .tif`.png}
\hypersetup{colorlinks,
citecolor=black,
filecolor=black,
linkcolor=black,
urlcolor=blue }
\setlength{\textwidth}{420pt}
\oddsidemargin = 0.5cm
\def \m{$\mu$}
\def \g{$\gamma$}
\def \b{$\beta^-$}
\def \a{$\alpha$}
\newcommand{\unicode}[1]{{}}
\def \PCL{$\text{PCL}_\text{13000}$-$\text{PEO}_\text{5000}$}
\def \PEO{$\text{PCL}_\text{1100}$-$\text{PEO}_\text{550}$}
\begin{figure}
\begin{subfigure}{0.36\textwidth}
\includegraphics[scale=0.72]{PolymersomePCLPEO.JPEG}
\caption{PEO-PCL}
\label{fig:PCLPEO1}
\end{subfigure}
\begin{subfigure}{0.34\textwidth}
\includegraphics[scale=0.4]{PEO.JPEG}
\caption{PEO}
\label{fig:PEO1}
\end{subfigure}
\begin{subfigure}{0.32\textwidth}
\includegraphics[scale=0.82]{PCL.JPEG}
\caption{PCL}
\label{fig:PCL1}
\end{subfigure}
\caption{In figure a, the chemical structure of block copolymer PCL-PEO can be viewed. In figure b and c, the chemical structures of respectively polymer PEO and PCl can be viewed.}\label{fig:PCLPEO2}
\end{figure}
It now looks like this:

I would like them to be horizontally next to each other with some spacing in between, but I cannot figure this out..
\textwidth. Is the problem solved if you decrease them all to0.25\textwidth, for example? – Stephen Morgan Feb 24 '15 at 10:08