Silicone Pressure-Sensitive Adhesives (Solvent Extraction Method, DSC Method leh FTIR Method) te tana Curing Degree Testing Method dikna tehkhin dan

Jiangsu-a’n Silicone Pressure-Sensitive Adhesives atana Curing Degree Testing Method hrang hrangte tehkhin dan PTFE High-Temperature Fabric siamtute an ni

(Solvent lakchhuah dan, DSC hmanga lakchhuah dan & FTIR hman dan)

I. Measurement Principles leh A danglamna pawimawh tak takte

1. Solvent lakchhuah dan

Hetiang hmang hian gel awm zat a teh thin. Sample te chu solvent tha tak hmangin lakchhuah nawn leh thin a ni a; uncrosslinked molecule te chu an inthiar chhuak thin. Dried residue chu insoluble substance mass fraction chhut nan an rit a, hei hian macro insoluble network structure proportion a tarlang a ni.

2. DSC tih dan tur

Hetiang method hian residual reaction heat a teh thin. Uncured sample-a heat release zawng zawng (ΔHtotal) leh test sample-a residual heat release (ΔHresidual) te chu teh a ni. Curing degree: α=1−ΔHresidual/ΔHtotal Residual reactive functional group awm zat a tarlang a.

3. FTIR Spectroscopy hmanga thil tih dan

Hetiang method hian characteristic functional groups consumption a enfiah thin. Hydrosilylation system atan chuan Si-H (≈2160 cm−⊃1;) emaw Si-Vi (≈1595 cm−⊃1;) emaw peak area variation te chu track a ni. Normalization atan internal standard peak (eg, Si-CH3 at ≈1260 cm−⊃1;) chu hman a ni a, chu chuan chemical bonds bikte conversion rate chu direct-in a pe chhuak a ni.

II. A dikna tehkhin leh tihsual lian tham

1. Solvent lakchhuah dan

Physical entanglement leh topological locking-in a tang unreacted chain segment-te chu 'crosslinked structure' tia hriat sual a ni a, hei hian chemical curing degree systematic overestimation a thlen a ni. Chu bakah, test result hi dissolution efficiency, microgel hloh leh operating condition inthlak danglamna te hian a nghawng a, precision chu ±2–5% chauh a ni.

2. DSC tih dan tur

Low-to-medium conversion rate-ah pawh accuracy sang tak a pe chhuak a ni. Mahse, curing degree sang takah chuan diffusion limitation avang hian residual functional group te hian an react kim thei lo va, hei hian measured heat release a hniam zawk a, curing degree pawh nasa takin a overestimation a ni. Thil tihsual dangte chu baseline thlan, side reaction leh ΔHtotal tihfel atanga lo chhuak a ni. A repeatability pawh a tha (<±2%).

3. FTIR tih dan tur

Chemical bond evolution direct-in a enfiah a, chemical conversion tak tak nena inmilna sang ber a nei tih a inchhuang bawk. Main errors hi peak overlap (eg, Si-H signal-a water vapor interference) atanga lo chhuak a ni. ATR mode hian surface layer chauh a detect a; surface leh interior inkara curing uniformity a danglam chuan test data chu a distort ang. Measurement hi Lambert-Beer Law zawm a ni a, uncured reference samples-ah a innghat a ni. ±1–3% vel precision sang tak a nei a ni.

III. A dikna Ranking kimchang tak

atanga teh chuan Chemical bonds conversion degree tak tak a dikna sequence chu: FTIR Method > DSC Method (low-to-medium conversion range) > Solvent Extraction Method a ni

Solvent Extraction Method  A dikna tlem ber. Test value te hi physical contribution vangin a sang a, chemical crosslinking status nen inzawmna tha lo ber a lantir bawk. Chuti chung pawh chuan a result chu industrial application-a practical service performance nen a inhnaih ber a ni.

DSC Method  Low-to-medium conversion rates hnuaiah rintlak leh dik tak a ni. Diffusion-controlled region chhungah curing degree reading sang lo tak a siam thei a, chuvangin highly cured system evaluate nan independent takin hman tur a ni lo.

FTIR Method  A dikna sang ber, chemical conversion chiang taka thliar hrang thei, a bik takin medium-to-high conversion rates hnuaia differentiation atana tha.

IV. Practical Application atana rawtna te

Solvent Extraction Method  Gel content hian service mamawh a tlin leh tlin loh rang taka finfiah nan quality inspection atan a tha. A chhiar dante chu chemical crosslink density nen direct-a tehkhin tur a ni lo.

DSC Method  Reaction kinetics research leh process monitoring atan hman theih a ni. Conversion stage sang takah chuan measurement deviation ngaihven tur a ni. FTIR Method hmanga joint test neih a tha.

FTIR Method  Jiangsu PTFE high-temperature fabric siamtute R&D atana calibration method duh ber. Formula siam leh process optimization atana chemical conversion rates criteria direct-in a siam thei a ni. DSC testing nen a inzawm chuan curing progression chungchangah complementary information a pe a ni.

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