Small scale injection moulding of modified poly(vinyl alcohol)
Small scale injection moulding of modified poly(vinyl alcohol)
复制标题
改性聚乙烯醇的小规模注射成型
DOI：
10.1179/174328910x12777566997379
复制
发表时间：
2010-11-01
影响因子：
2
通讯作者：
Coates, P. D.
中科院分区：
文献类型：
--
作者：
Li, L.;Mulvaney-Johnson, L.;Coates, P. D.
聚乙烯醇（PVA）是一种性能优异、用途广泛的多羟基聚合物。然而，由于其熔点和分解温度非常接近，其应用基于并限制了湿法工艺。本文基于高分子材料工程国家重点实验室开发的分子络合增塑聚乙烯醇（PVA）热加工技术，通过与Polymer IRC Bradford现场合作，在FANUC 5t注塑机上实现了改性PVA的小型注射成型。研究了改性剂含量对聚乙烯醇（PVA）熔融行为、熔融结晶行为和流变性能的影响，以及加工条件对PVA注射样品力学性能的影响。在适当的改性剂含量和最佳工艺条件下，可获得结构均匀、拉伸强度为42 MPa的透明PVA注塑样品。这是生产高性能PVA三维制品的方便途径。
Poly(vinyl alcohol) (PVA) is a polyhydroxyl polymer with many excellent properties and wide uses. However, its applications are based on and limited in wet process due to its very close melting point and decomposition temperature. In this paper, based on the thermal processing technology of PVA developed in the State Key Laboratory of Polymer Materials Engineering through molecular complexation and plasticisation and by cooperating with the Polymer IRC Bradford site, small scale injection moulding of modified PVA has been realised on the FANUC 5t injection moulding machine. The effect of the modifier content on the melt behaviour, melt crystallisation behaviour and rheological properties of PVA, and the effect of processing conditions on mechanical properties of PVA injection samples were studied. The transparent PVA injection samples with uniform structure and 42 MPa tensile strength were obtained with proper modifier content and at optimum processing conditions. This is a convenient way to produce high performance PVA three-dimensional products.