The synthesis of polyisoprene (isoprene rubber) in latex form was carried out by conventional emulsion polymerisation and by miniemulsion polymerisation using hexadecanol as a hydrophobe and the two methods compared. The influence of an emulsion system, monomer and surfactant concentration on conversion, particle size, gel content and coagulation were investigated. Molecular characteristics, thermal behaviour and stereochemistry were investigated by GPC, DSC, TGA and ¹H-NMR. With decreasing monomer concentration and increasing surfactant concentration, the number of stabilised droplets in the miniemulsion was found to increase. The greater number of loci for the polymerisation reaction thus obtained a lead to an increased conversion as well as a reduced gel content.

中文翻译：

---

通过细乳液聚合法合成聚异戊二烯：对热性能，胶体性质和立体化学的影响

乳胶形式的聚异戊二烯（异戊二烯橡胶）的合成通过常规乳液聚合和使用十六烷醇作为疏水物的细乳液聚合进行，并将两种方法进行比较。研究了乳液体系，单体和表面活性剂浓度对转化率，粒度，凝胶含量和凝结的影响。通过GPC，DSC，TGA和¹ H-NMR研究了分子特征，热行为和立体化学。随着单体浓度的降低和表面活性剂浓度的提高，发现细乳液中稳定液滴的数量增加。因此，用于聚合反应的更多位点导致增加的转化率以及降低的凝胶含量。