摘要
重质碳酸钙粉是一种普通的无机非金属填料，经过超细粉碎和改性，可以将其变成一种性能优越的功能填料。本文选用鄂西生产的超细重质碳酸钙粉为试验物，对其表面改性的试验方法、改性剂选择及用量、改性条件及改性效果等方面进行了一定探讨。分别采用了表面化学包覆法的干法和湿法两种改性方法对超细重质碳酸钙进行了改性。用表面改性偶联剂中的金属酯偶联剂和硅烷偶联剂，按不同剂量进行不同条件多组改性实验，使超细重质碳酸钙粉由亲水变为疏水。通过对改性前后的超细重质碳酸钙粉体的白度、粒度等性能及红外光谱特征的对比和评价，确定了超细重质碳酸钙粉表面改性的较优方案。最后将不同改性剂处理的超细重质碳酸钙粉按一定比例充填在聚丙烯塑料中，利用复合成型工艺制成聚丙烯复合塑料。经过塑料性能对比试验研究。
Through superfine pulverization and modification, heavy calcium carbonate powder ,
a kind of common filling agent, can be changed into superfine heavy calcium ca rbonate (SHCC)
powder, which is a sort of function material with excellent prop erties. The authors collected
SHCC from calcite mines of western Hubei. First, t he authors tested different surface
modification methods for SHCC, defined the t ypes and dosages of modification agents, found
out the conditions of modificatio n and appraised the results of tests. In the modification
process, the authors a pplied two kinds of surface chemical covering methods, i.e., dry method
and wet method, to change the surface properites of the SHCC, and used metal ester coupl ing
agent and silane finish as surface modification agents to perform the test a cco rding to different
dosages of the agents under various conditions. In the final test, the SHCC was changed from
lyophilic to lyophobic. The authors decided the better test plan for the surface modification of
SHCC by comparing and appraisin g the whitenesses, grain sizes and infrared spectral features
of the SHCC. At th e second step, the authors filled a few kinds of modified SHCC powder which
were treated with different surface modification agents into the polypropylene plast ics, and
then produced a few kinds of compound polypropylene plastics by means o f the compound
shaping skill. Through comparing the properties of different kind s of compound polypropylene
plastics, the authors conclude that (1) the function s of compound polypropylene plastics filled
with modified SHCC were better t han those of polypropylene plastics not filled with modified
SHCC except for ten sion intensity, and (2) the functions of polypropylene plastics filled with the
SHCC which was modified by metal ester coupling agent are better than those of p olypropylene
plaastics filled with the SHCC which was modified by silane finish.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
1999年第2期172-177,共6页
Acta Petrologica et Mineralogica
关键词
重质碳酸钙粉
改性
功能填料
聚丙烯
塑料
s: superfine
heavy calcium carbonate
surface modification
f unctional filling
polypropylene
plastics
