Standard No.:	GB/T 1633-2000
English Name:	Plastics--Thermoplastic materials--Determination of Vicat sofening temperature (VST)
Chinese Name:	热塑性塑料维卡软化温度（VST）的测定
Chinese Classification:	G31    Basic standards and general methods for synthetic resin and plastic
Professional Classification:	GB    National Standard
ICS Classification:	83.080.20 83.080.20    Thermoplastic materials 83.080.20
Issued by:	State Quality and Technology Supervision Bureau
Issued on:	2000-07-31
Implemented on:	2001-3-1
Status:	valid
Superseding:	GB/T 1633-19791989 GB/T 1633-19791989 GB 1633-1979 Test method for Vicat softening point of thermoplastics
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	60.0
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1 Scope This Standard specifies four methods for the determination of the Vicat softening temperature (VST) of thermoplastic materials: Method A50 —— using a force of 10 N and a heating rate of 50 ℃/h Method B50 —— using a force of 50 N and a heating rate of 50 ℃/h Method A120 —— using a force of 10 N and a heating rate of 120 ℃/h Method B120 —— using a force of 50 N and a heating rate of 120 ℃/h The methods specified in this Standard are applicable only to thermoplastics, for which they give a measure of thetemperature at which the thermoplastics start to soften rapidly. 2 Normative References The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable.