摘要
研究了偏氯乙烯／ 丙烯腈（ ＶＤＣ／ ＡＮ） 悬浮共聚树脂的组成、玻璃化温度 Ｔｇ 、熔融焓ΔＨｍ 、结晶度 Ｘｃ 和溶解度参数δｐ。结果表明：虽然ＡＮ 的竞聚率较大（ γＡＮ＞ γＶＤＣ） ，但ＶＤＣ／ ＡＮ 悬浮共聚树脂中ＡＮ 含量却低于原料单体中ＡＮ 的含量；随着树脂中ＡＮ 含量的增加，树脂的 Ｘｃ 降低，大约在ＡＮ％ ＞ １５ ％ 后，用悬浮法制得的ＶＤＣ／ ＡＮ 共聚树脂为无定形树脂；宽组成分布ＶＤＣ／ＡＮ 共聚树脂的 Ｔｇ 与平均组成相同的窄组成分布的树脂近似一致，加热过的ＶＤＣ／ ＡＮ 悬浮共聚树脂的 Ｔｇ 会显著升高；树脂的组成对树脂的δｐ 影响不大。
s The composition,glass transition temperature(Tg),melting enthalpy(ΔH m),crystallinity(Xc)and solubility parameter(δ p) of vinylidene chlorids/acrylonitrile(VDC/AN) copolymers were studied.The results showed that AN content in VDC/AN copolymers was less than that in monomers though the reactivity ratios of AN was greater(γ AN >γ VDC ).Xc of the copolymers was decreased with the increase of AN content in the copolymers.When AN content in copolymers was more than about 15% (by mass part),amorphous VDC/AN copolymers could be prepared by means of the suspension copolymerization.Tg of the broad composition distribution VDC/AN copolymers was nearly close to that of the narrow composition distribution and Tg of the heated VDC/AN copolymers was increased markedly.The effect of composition of the copolymers on δ p of the copolymers was small.
出处
《塑料工业》
CAS
CSCD
北大核心
1999年第5期20-21,44,共3页
China Plastics Industry
基金
江西省自然科学基金
关键词
偏氯乙烯
丙烯腈
悬浮共聚
特性
发泡塑料
Vinylidene Chlorids Acrylonitrile Suspension Copolymer Composition Property
